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 0xf864b207db6e390bdfda9319c3c3685e80d4a2a4c7cb75a1b1a4509b0f57fa42. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91d6522b-855d-4777-a6b6-517587bd904e.json and https://artists.proofprofile.net/proofs/artist/91d6522b-855d-4777-a6b6-517587bd904e.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 0xe311baebb7c70b3cce0c966639cbee64413bd94ec31e49c30e25acb3f528eb1f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2P2219816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62ac2b6e722231d0ae114b8e4b30e0b2a8fa9463debf1b1aff4892fb0a1bca0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2219819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3404b3d2f09977bda92fe67ad73288bd2ccab942f21fbec6e7e133a6c54406c. 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/USA2P2219811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011d286ecd612d7ad5da2f1b327c013b66bd875efe6ef858cb3547b8ff16f53f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2219806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66c9fd283b2f30dc04b0be138aed443e8daacbe6e12d83f96248d39497f4a28. 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/USA2P2219814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65147d2a4d57a1338392d9a529fb935ff0b9710935001b19ba1e76004aa2a9f8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2219809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61c5ff382ded66776afd79b53a6d727045fbe11139d1675c7d62417b2b88a35. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2P2219813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c411486ea078db066633249bc754ee6879be90ff9b87da850ce841e8c4a9a2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA2P2219817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bfd1cee2e6e543242fe9f4b809ce015eab9e1a79a7028b5215dfc6c3ba7301. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USA2P2219804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1360b396f208aed0a4b91429d9a8eb278c0f097248ba04eaebacb59d6ede9781. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2219815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea4257feec6c883bb58fd951f883996df38b60e7c2fe42d0f79012c18ef1408. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USA2P2219810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa572b0d1eceeb0c6c46ba509d1c7a878663ed704eb4f149c9199dd8c7e28bcc6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2219818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4024e6af272188b17b8ab62053b947c5d9895ec9b812040522b8800fc947ca16. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:38:24Z), 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/USA2P2219805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12d5bb94752da0df11c5684bd5695ae27e039a44e7a602059d2ab6a516a31b6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2P2219812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062444d05600eff75f1eb4a6bbc6263e5961da4773b33b1f85a69885899f7a72. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2219808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b32ecb1095d90b36531ebe51f9e4f9476733cf0d91dd0e11cfe0990319e539. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA2P2219807.