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 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 0xd55adb9b39747f77bf7b56ff533b46c5cd8c33583f18ee22a24f973fc2cdbbbf. 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/f2e41353-ca9b-4740-93a2-783717b89224.json and https://artists.proofprofile.net/proofs/artist/f2e41353-ca9b-4740-93a2-783717b89224.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 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 0x66a63e16de3d36f2c8c67812af149b18d5bbc461e799bbf4f29c9ca88fea83f9. 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/TCAGB2283005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea287369778e6ba1455ce27bc21eb7c5ada8f9bc845cd2337ac50cf75bd58cc5. 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/TCAGB2283017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd401a999b08995d01a5368cfa3209362fd0e33ad278f72750b510e809f08798d. 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/TCAGB2283022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fb1c46eac38b1649f639bfadd3f945495d11e39e652c7e931aa197e1b5500a. 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/TCAGB2283031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9974f49dbf0da62c681b3e578652cd36913932e1fc76dc2097035077d528e8. 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/TCAGB2283034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54aff211993fb21e41e953e12f75802afc64bb12209eb7ecc01023552600fce. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:15:45Z), 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/TCAGB2283038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804365d4d01c843a2a932b5e710a2f376f6f3abc756258d454ba7f03dddbd209. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:39:28Z), 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/TCAGB2283039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363b9edde87a3d2f1ed99bfe2770860a46b06c7d0b7c9cf75105d10a5bb5cadd. 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/TCAGB2283041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52562caaf83c9e7308d40d83ea2e1735bb0898c693ed0a7b6f284dcb9a9c0f2. 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/TCAGB2283046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b09821228a247c7bda6fa97068b4daf48875ea07d6a5c2967dd39fe8166cb6b. 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/DER651718901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dd196f8b59e581f42ec6dad4e6c9c1c56650263d18db09bfcf2b9667d4b760. 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/DER651718902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c31c6b094156416e1f625d64d5938616cc1d28229c252263f436cbfced513c. 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/DER651718903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a991bfd4b0bdd30e489e3024a6cd5b053bdaeb645536ded4ecdbb6b8305eaf9. 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/DER651718904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5cc1cbde9827c4dd5f0e4bdc1f3e971f53822a5c84a281e2e9637a0a95d9b3. 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/DER651718905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f38ff37b3da45483536e6b1c7d0c18db904a2123f6dcc908e539d673ecf3c5. 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/DER651718906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077770b408f90b41d76068f5f222ba61c2fa28b56c5b65dafa6742082b9c38e5. 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/DER651718907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4150e05b2791b90d1279b8dcf358599c5669a50a2aae9b2dd260f30d9174560. 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/DER651718908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8085d1dae9aa23705302db27dc657bc0300096c27744ce152f99ad973d7f6456. 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/DER651718909.
Ansamblul Folcloric National Transilvania
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f497ba2e7f0897fc3b9d3e2f02bf4d6b59fd8d7c77edd3f8d0790348b5ab3. 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/TCADI1735325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857b7ea83fdea335357929df0f92eba12268a3e800afc0acb4e67557403813aa. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCADI1735336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71eb79011e3e84c4aefd073e4b1e8b1d5efd6f4374b8f57ab05a95865962bbe. 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/TCADI1735340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a41eec2152f05ab343ee2269ec977a84684cc2edc8a2b572982c3388b716e1a. 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/FR26V1522855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307874df3ffd857427fa74dfb4badb4f83668daab27ed6e0ef3867563eb87dac. 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/FR26V1522856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ebe1dc36ec0adf4c184cff2250eecee7bd7c9baa2d82e4cabd31c015d0889. 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/FR26V1522857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a5c3a98969d1d435eff73f3ac736dde774e438dea88b82f08eed50857fea10. 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/FR26V1522858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b1d1983ca3820926a287ac72e6634f2eb19a506a70a9a4ef230a40767307f5. 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/FR26V1522859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f89cac90ab815a2fdc95c969a2464f5fcf0eb564f67788c544831df9514bde1. 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/FR26V1522860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd768e119028b14c34a0962287792f828651f715f2b24717cb4d176d288f3ad. 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/FR26V1522861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f44140e333be5b51fa680d4fe1182314b4e6f0a21063c3ec9a3eb21212c4d0d. 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/FR26V1522862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24598adc969177ac8a8e64d486b151e2b8543f21553cc3f07dfa21d7ad48ad55. 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/FR26V1522863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d79515b4d675ada2fb74f04c37f66876b692050287f2a72b8b62f6184a2584. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FR26V1522865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef4d083afa3517856c76e84262dee132c40746a983a3d5f9e5a1914c7d0c9c9. 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/FR6V81667251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8836acd253f0c166bc0e624e46790c0541b25195fa8fa0d84180539408d6b7. 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/FR6V81667252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd17e38dece08c7f942ea5095683046651d15c0bd768ce2cd9b9c1eb7139396. 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/FR6V81667254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85835d90328ad97cb621aad3575875320f639e8abc0fc4ef20875aa3b1ca2be4. 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/FR6V81667255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5072e3d930d4447911e6820f1802aaafb182198ee1d7feb56720c0b02f1727. 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/FR6V81667260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31fffeb498cd7b3b69bc036043fb937477a2c5353f5f7792b5144a4098f1c4d. 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/FR6V81667262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e694f54d461103c596c86c483566e5995093f9566ae8a6307d0d6cc03ea644. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TCAFG2014529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564ed218ff8447beb6abe6932a787cf43e370804d746e834eb9f8a07f4754ed6. 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/TCAFG2014580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2ad685427cc6d5f42cf568ef51182f46c4b88db79934a57c8a5eb40437196d. 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/TCAGB2210235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b352dec0453ce9d33b5bbc810e5a73889c1cc67d26df7b76f13f4e70c9e8df5. 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/TCAFP2119293.