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 0xa13671a134f6f3f385dc859169054d8e982981d2ccfabebbb9130cd6e17a2eaa. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5893ab70-d0d4-403d-b2a0-ac8c9fad327f.json and https://artists.proofprofile.net/proofs/artist/5893ab70-d0d4-403d-b2a0-ac8c9fad327f.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 0x7c214be6d4be26380e0bba6c9f1e62554bcf1aac23fa3fdfcab9a1bc4be2d012. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMAAK1991698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9005ac85c2da008b743e206c8f81204e2a6d0584c70fbac1aec53f08f74dc9bf. 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/QMAAK1991700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1808f8c4ea872105269f69ee6781405e20eeb829fa7e617310305995ebf2d630. 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/QMAAK1991701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed2ad06c7227eee3fc4966927c68c81e9c6a571d67cc7d38fee4683b52e3fa0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMAAK1991702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac04748eb8a7950b3d0c779ce584269fbd4bf6d27bb1f5a7e1c2f9e68d62be4e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMAAK1991703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08d69518155f2143b6f1af7684d15620b239c9a52071d35f1452cb107e3d0f8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMAAK1991704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e90eb392343ee4c8034587ab1de9236dad78de36760e3ca8516e2cdb3451f74. 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/QMAAK1991708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb568c449da8f130e0af861058ff0796751a0b4359c19d0cbe7d0e18f6764d9a5. 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/QMAAK1991709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb1872f8699126d03e382270c4dc94161ad8d5067b88c8845a17a525f628d8b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USCGH2590224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abd379a06935b25f6a5496faba15c5b2c1bb751487afe03d93151631e27f31b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH2590226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0715956d6a1427fd04606aa91cc07584b98f69006d8e43ac3da1db8f079f7234. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGH2590223.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb166ef48294543386a38767c3b6011094a51514702904755979904ea9795d3c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCGH2590225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc39c9756528213b90f4d09c0cdd9ead403ad8d199cbcd8847ade54d39a6f3f0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH2590227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823c2163a196f84c1b8b07fd3bd4fd7d6d7b875b5d936950a747ee07e0c7d722. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USCGH2590228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45feee088ea6d40c282c040193ce1ad7bb244b5af9871945676891da170dd3fa. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/USCGH2590229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fa00c314807bf5f08a9d4634cb78fd897c2022f07c513926084b2555819c5c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USCGH2590230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c93899bd2369d2ce1d5fc610c9954f55e79145c02782e0443cac13c075fe08. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USCGH2590231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78a95944c183c357c80cd88829138c230cba385245abc77f74cc2cf16ed48ee. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/USCGH2590232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcbab5500a10f98534d9faa37389a8f2037146b35f16c7729f511f384547352. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USCGH2590233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d52a8d9214088b998f0b43b3f9f95c99cd08ea9a61189df997098395dfb543. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH2590234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af50739a9b9dfa3932caee3f7370c36d1d049a00f3947ee66b24cd6254d8ef6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGH2071596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd69bea6e45b068b63a8312c50eb5920da846786a27a0731658a2befd666a3f. 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/USCGH2071598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04d9ddba111982e90d63e934644e2e93abf9d39716d83669a323bfdb1912818. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USCGH2071600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78a1f7555fb8cbbd22dd19ed3262c4ea7839f4b4eb41a385e5caa7fadb3fe64. 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/USCGH2071606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8076c09e7b14d2e69164a3fd3d7a2110b84ab32b9d99b9bd17f24a841e2366cf. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USCGH2071597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dcf272125e5e275df65ef34a9369019e978a58ad7c963f5d62ed8366d2af9b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGH2071599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4313ea0fbc91ef57cf90f0effc25e1be59b2e014ad7082d3687f1ce9c2e5e8cf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH2071601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e2599e4efbf0be47c5fbd6abcc50d75ed52c13e6eab8311f02fb7aa9872b85. 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/QMD7N1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9205a38cbe895e02abda8ac06fc8a348f107f92c81df57c2ba7af27853cea984. 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/QMD7N1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ec9dfab1a0943ecf4b07c581bbf103cf236b2c0361dab716c829ee06ffaa78. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMD7N1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef00c8bdc4a080695073e292084dec6fe2865fefadff552204290c2cff07ded. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMD7N1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd4cecc5fffc957381e6b0bb4ab1df9b1a0db268261e7f1792bc816a75f678a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QMD7N1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f3f2ff3d3f1b0ff3edbab743b916bee5caa25a92696928b0fcf5c969d3af61. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QMD7N1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa82a91725913daa9b6c338e63b467caf55a8f763b8ebb0b784df7a947a5d4b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QMD7N1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea66bf07782eb98908ccfd3099aacd4deea01dba8459ec4f28f23b2101f4181. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMD7N1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3730314e1efe5578e027cf5dc50c2f29ffdea65470a0d947461d3358d73bf01b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMD7N1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a55fdf3145dd7d0436c673a40b98febc0caa0ad73cb7adfb2acc8ec03183f7. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QMD7N1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b13e83759e08e3f5f2792299b3c75c313e8e78c879d5febd5260516520b514. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM82084952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb257e3660eaf02be96d7d0aab71aabe515fabaa9258e87ec3a63bab1d534ca7d. 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/TCAHJ2334899.