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 0x1eb1871eff35e044b1443ec7b4054eb0cb14eeb99ff44008bb14f08980b85db2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2db10741-acb7-46dc-b3f4-9cf900aeb91d.json and https://artists.proofprofile.net/proofs/artist/2db10741-acb7-46dc-b3f4-9cf900aeb91d.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 0x6f9ff549e6c0c9fb0d365af1bd63ef9a848b1b0606dce383c2e7e1eb7c09280a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GB8KE2407168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5592eca8c882e9467e0ba1df51255bc8b4ec606bf7eb9286b217aa57d6af5fed. 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/GB8KE2407169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f6ee05371a309c26642b13309c7f7ef3088df2cd843ffa1f0f4c2c7ae29ed4. 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/GB8KE2407170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4845ce93665bb11b97a1b59860344585f5393d8247213678a309827fc2e7c8b3. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QM6MZ2409821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9adb44131144536500b6b3e2199256e806ebf88c7d5446720a3bc9cbda02be1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GB8KE2409124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc128ed7f33b91f9786d0e9839a40ecf2fdf20e2d0e01eedd643d0e070de991f0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAY2455299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30add95485032765088ee602ed470b776477d89c7585520485019320b31345ab. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NL3M12407294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0769ebd2a12faed67b3e843881848358e3d9405cde17f956603687eec609d07. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:21Z), 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/QZHNC2552645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc62a59adfbace067e8b631e525f87c46db40c32f470f417a8f1a63fffdcd9f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHNC2552647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ab6bc690296eaa684e0d746e4c8c6bff8d01ef8227ac93bf99c56359e97c86. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3DF2541056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad749c59619b0ea981d9801cc8b0f9509be45d33e69c2da64c597f08c90e9e55. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF2541055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b504c38b87850ec0930b4410f36edc9705db6c505cc30085290c008e7ce5adb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF2541057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5bf84df3829327a23f3a9942e573e64cdf99d696163bb1aac5c89db6d82931. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US3DF2541058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad749c59619b0ea981d9801cc8b0f9509be45d33e69c2da64c597f08c90e9e55. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:54Z), 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/US3DF2541055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744d12f0ace1572a91153b0b7e9f0157eb9cd31ce9e17fd5de60225a32fa7d93. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3DF2541054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c62cba5bd753e750ae3a7654d1e4de44f63dcbe5de21862516f34f274ac8f3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM7282510980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24606aaf999a7d266c118f02e04ae84e1abf060dc3adb140f97f1841959e667. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM7282510984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bd7a88b7a85e8d8d13630f2366e56ccb5cd5fb66df7fc569778b75cfc8c805. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/AEA3A2196079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb021fbec96e2a6cd3ef05acdeba805567f28553f50c5173b9b80d0767855e679. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA3A2124873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abfdebf23218d41f24aebf7d80ff92506a9f28f148a4df4bce74a2129ab9857. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:40Z), 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/AEA3A2171004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd76534e20fd32efb2546895499c760dcf784c3346b2a1375074c507b10182c9. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/AEA3A2171820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8144c006433fb2a2373907ac0fb1d2471ee5b76da1a81e2ca51ffe0093608de0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AEA3A2153712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877cb7b93d5590a9e2a3e561d087f93d559424b1b8c1d0dd8c4cc0138fb238ef. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT5M22528575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e89ac65bdc589fdd4ea436010bdfda7fd43dc699b922fe9ab1e77ddf52f5eea. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT5M22554464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718c46c35299dc329198e8546bf4a7a36322227aa5b540b43f7a41b3121e1d19. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT5M22585253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565972216fb0f32217153b2278cace9a20f6e4935b0317cbf3f6406b5a0abab1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USANG2531169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85c4c79ad88e7fc3b5642c82c83c6460e6fd92049f3802bc3de4b7e02fdde56. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USANG2531171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a4c65e636f357b4e5933ae7cc5bb5d2d7576c69e04cb3cce52b417ec72e3d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USANG2531172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e87e10cfd0f3b8e7bc6a85f3bbc2373799424cf89f10025865e92a45ffdb093. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USANG2531170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc7f8f46cd173c214372238c36f2521bab357ebdcb7401795a22b7502999abc. 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/QM6P42420455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45dc093a0a8ff3aedf8938335658a48ebe18a62eb8167a866082a295119c97d. 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/QM6P42420456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd958914b41626b1cea2660e3fb7f6b9a83c3254795f7a362369978c1fc0f953d. 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/QM6P42420458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaea0b2f0d44c18215ee9a49c4861eb7f567e635fd3a96e9435d1f0de666e52e. 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/GB8KE2325378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02137723ce21f06bdf346ac7c8466a0005876866f144ba57083bb650a9b35af9. 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/USANG2418732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054c5741e0fda9d1c25a47e6c8dd7a047a0dac3a7d5603bde68bed68aeaed345. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6P42420457.
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