1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73d4a9b1d8e67662e85a4d444f8365d7bb17a7476f820ca399c868837b4d3fa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da7494ba-1460-4d5b-a00b-b8f8f5db4704.json and https://artists.proofprofile.net/proofs/artist/da7494ba-1460-4d5b-a00b-b8f8f5db4704.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99d066544c25fcf17badc4f1da18a589a5dd666f6f847de5db33ca6befa6977. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2021730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aa4f6e299a39772dc187db3693f52378bd4786a416f95c4c7932ccfcffb722. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2394510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975254b94e76240bcc6c4e9b7a1ff173a026476194c7761e0b1cf8666770cd28. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62210003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25376d50e1cd7fbb3fc22df3c227ac877fa4c75527960681559c10d60e80d943. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2116819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06825db2db9fc7366b50379664fb5f7c041b592ff73451072de353b93db6124a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBWUL2053312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1058a733aca1ee8b162e206af1d150abf3dedeb24af05a1379c8ab9b15c4c35. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CLAA22100316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9960092ea35f0415bde977634ba028208544078ceba4f1552b84327725d9b99. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CLEM42100863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc376b8fc4345540170131158ec9a724cccbe469e9663762144c78bf21481b365. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6N2039895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4059661dc45b6b1b29d89f368bc3839daed670843e51d91716271efc2ace57. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2144026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab02a6465cd3bb0f24b66aa8af6b3f7f1c0280961a848da2fe5e71639be1d9c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2420592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32446463cc04bcc0e93b45f8566ea879253caa4edf7df7ee3c85c0d3df2b4509. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2203646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413a0a573759eecb21488e9da7880a9bdc18fff8235b5e141ef3ddd418deaf43. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2588937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf309f4320e7bd0d8f6e0aead636446dd9a935d9bfbcbe4fb2a728419ca2586d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2580007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f9760c3c69ab96274722e702ae0fd0941f9fc15ab8ca434370f7f2119784e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2504522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb670ab8a6959988faa60bd33478cf04b357866acecef48279b296b44fd19d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2421504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73442e1817eb28c2106c6a010217fb7a72549eb29bf99e1c91416665dd51e420. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62470911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172ea79443512627131e1f32b261ce15f578665779ffcba13554899e9bb68e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMBZ92405142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b05f8aaa4b8e74d6fe62c27ebad59e3e36990acfb7a9dfb4b840e6da1806186. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2420674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063925f4e3331b098a4fbbf6dfc3b7e753fa9bdaa33c3ddd491fe36faf142b16. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA62279605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47990f900da5f8435d409bf8673130cd9f993da09274d9311c4a553a59220065. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZG2X2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae079eae6b86ec16759cdab43d94a94232dce9528547eaebec5fc0e2e69a5c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2224676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7a8c0a49306fdb47a1d0937ebe20bce441a3498c2e40ef5133599ef72f1517. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2275401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f428bd78cde32ba6113ea632811531e2d582a2bf175137a16250c741a8aed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA72171771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5f05bf5479dbcebd4de480ca1ec10ef57dc600aa8ccff2b019ab35d3a15212. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2194117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9320bfab5b08329d604f4fc5e092d7123592736b3c819e03c15813256111f66b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6MZ2191304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0645bfd133de5073f04195939cceac6623cfca76bffabdbfc5e6cdbe6af706c1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2134805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a43c955859f24ba107c270a14346898dbe40f9c3f4764dbca09db4216f0d218. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2030260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7014a4a9bc19091471cf21cbdf7260d646fa764725b827fa3845caf3cd160cd1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2078442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed7bdb014696dcd139bcf4e8a071f523ca3fb9cf2e4766f9a35a64d8f739581. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBRKQ2001404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036026b107f07e6a0ce5300db8b4d69b7d588c6648fb555e58430c75f0fe940e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFME2038411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833e8cb100623bae4a709334618c7f5ea1defc90c028bb6abe2b93ba902be3e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMGR32118138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f95bb00dc2dfe3b8c052ab142167d0861d538584c899840f67beeed81789f1b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLZJ2025944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a543d0f02d8cd103a9c9df5fa46ade72607103ebbc9103c0f323cdf3218eb7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2074446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef76e66543388a7038f4c87f039b428d95120fd8fb66ff2e3c2cfe061d03fd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMGR32071724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c87dbcf77738eaaec4cfd7619c48db571f0aea7eee986290ef54dfafa34eb1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2030008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bcd8f0f2d086e8f38053c4a5ae60bcc3e01999a26e2e04114954526722fa26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMFMF2127911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf56c855caa5ecb5551c818df4afe20b16d248bbd2d506e8d2d86d5155c63e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZW9N2256965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08af2a100f0d632978dca45217450a57f179a2d38fd7719b603dc46be57b6d01. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTVM2298156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7deb3c5ffbca35e5875cd65faaf44cd521af9e95744d14890441ab336a8bfafc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CLEM42100878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dbcdebf5413b0f5385b1c3b8af2792dadf3228e4e248009b6dce157a8ce5c6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2086704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d9a6fb928ab9d250bcb679704dd04589271f9f2aab0b9186f831bced40ade0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM7281905007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb7894ca795b216ca87b3906b0030b22aeddac5301303ba704b68efa1dc0c38. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMGR32049169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ab30e1e453f268b28e2162dce698fa0583acca29724ba720792bb1cdc414f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CLKT21901924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45ecdc827650d70933036f1f1cc9e0a35067e1ff8cd2467459068f3f77b46b4. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ5FN2201442.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch