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 0x3cf2620f6ede6d352201bd5093b8b16f1365c314c880d9a4b61797a094196c2c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ccdc114-3596-456d-baa4-26b0ef410364.json and https://artists.proofprofile.net/proofs/artist/8ccdc114-3596-456d-baa4-26b0ef410364.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 0xa6c943deeba8a224ad440064190121d34ef1655ad1f4e6e7355bde0bac72ca0b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USA6M0403901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7b2e85e4c0e4d6e8e20f95f754750878ad14d789ffce55a9476f37fd27c5aa. 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/USA6M0403904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dee1c30af05f21d660879521d30115d506a19c0e12a52898cc4cd4415be2f4. 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/USA6M0403905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798b21ba505ef74660711f2a765d158e00a8a6daa69662c5fec934fd2bf34efd. 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/USA6M0403906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee106993f6db8d9fc21ee74b2c82e3b39c2b32d3f5819fee95252702a6f62882. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USA6M0403909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63e3d95ed578df6a18f9d89abedbdf868743413b5a11ad5abfeaea5b1562dc7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:31Z), 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/USA6M0403910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63d228d589916032e3e7032793ba6b54d5ba3e7d32a452eb1911aa86515511c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:36:49Z), 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/USA6M0403911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833ccef1f724d6cb1d2c2cc423484fce1d4018832eded27afb48079b0681d23. 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/USA6M0403912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc343131ad79fba43480a1c202d59554f530e357b427f393c2da43c0f89bfdb3d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:05:29Z), 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/USA6M0403915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb02cfa4c1e0fa3c89c7a148eaa1fadf89e93ed89ea49291675898d887134e7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:06Z), 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/USA6M0403917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c76cbf8472c19166ff7778183849bfc276a90e1b3d372822f86c8dd8389cd4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:18Z), 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/USA6M0403918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638427e31157fdfdf549b3e73382c1d2c92c866caf3d51eb0d4921c7b0ae7afd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA6M0404501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05010733107c2fcdef797f923c7e428af600ebc321c44bbd2c446b4b5decfc7. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/USA6M0404502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0be3718ab0927b3ecd6170136767f80f75a784a671449f562c35e7c87f31ed7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA6M0404504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3535cf9e169d6ddb1171717f9920c5283deee601e8650aed9774f01852f733. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA6M0404506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace917c11681a9dac947484e376423f99d43e7441fa113741dd48259a87d83e1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA6M0404507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5ef03caf05527b7b2776150de5807a664114c3bb8d88cdbbc8c022566de855. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA6M0404508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0adb600e467710b4c131889fb3f1dce9efcd8cf212fa2bfc32f191b47a959b7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USA6M0404510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f9b0528fe85d5d5d0a567fe002a95b26792ab1150e2afc89e5a070e5a9a72a. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:06Z), 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/USA6M0404511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8edf94f2f08644713231e59b3716183a8a0b7bfdfeb55119825f7eff0c53ae. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USA6M0404517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a4ef95740ada22716ffa1769c7496268a02359753f181dc23c21bcbebb7476. 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/USA6M0408502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dfa729b3ea84a79ee33641ec90a4e97c4c89d9eac4ad3a7949ff634cceef10. 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/USA6M0408503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb090a17dda23620082b7ffefa4230cd3eb8a60a1f2361f0902f905a7284b420f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USA6M0408505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e0b9f6286fc08db6d680dcc017f45118e746a2bee4de559bae6b9af17a5206. 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/QMFME2110336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36dc5c3b967e3e2d197440d1180de62939d0a3084237efb9efea19ee17edbfc. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBAJE7500382.
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 0x949d10aad1ad8ada1be40d8efaa7e45a647174b7d6e48c33f8654a0eb0546d25. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TX2583021.