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 0x37c96d56fdb263ae6d3ae0d8ea7a9e506e2ef049d767b03888aa727c56b1fda5. 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/396cd527-8625-4271-9343-77dd373cca3c.json and https://artists.proofprofile.net/proofs/artist/396cd527-8625-4271-9343-77dd373cca3c.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 0xad8bee4146017453160290ded11fef896b71882344195dec03fdd491b2265f9b. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/QZ4JJ1982027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a6b76e7326345092b7e61e11d780a28821f6c5f7be7faefc9f117accb80ff3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:27:47Z), 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/QZFYY1951161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254d6f7f2ddb863a01d74cf774c6a55a738c2c5226e32d8806b7c79e9d32780a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:58Z), 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/QZK6L2204567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366d1bcf44801788cc894f4c8300edd18f8ad7cc77c11ab149f03710a7edbe6f. 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/QZTAU2256467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd926122ebec23ca97df0616093070f39846fd4d3a2259149fa8294c61cdd1e7b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:20Z), 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/QZES92357617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5768c4d6deddafa4dedbf60301c347e5e733ebde2f22abf5107eaad0df6a3e01. 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/DGA062467130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf534c0e966b121995b7d898b365cfbedb3cf5a2a9291e66ffe50d41e71a5e86. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRX762599831.