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 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 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 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 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 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 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 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 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 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 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 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 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.