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 0x532f3ba2a4a2b79444a64ebdaf1bb6522d38e487f74f0bd3c09b7e8270fa1c04. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84de5d25-56a5-4998-b240-2324b99e7e76.json and https://artists.proofprofile.net/proofs/artist/84de5d25-56a5-4998-b240-2324b99e7e76.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 0x4b3bf8affc463c42e0bbfdd56ad6a1742ad478ac1ad051ebcc44031955ad9b64. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEH742032120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cff10cee2c35f35737adcca2ea8046027684242881c841a2f73cb37a784f725. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZKDK2071979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f022d90b229b3147fcaeec0c8a8994b6e61b92629270d8d116bc9b94271704a. 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/QZMHP2002144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b93f3f773453e356cf5680521333376d39f4387417f1dd0c32eed49d6c3291. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:48Z), 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/USA2P2211766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438fd6f93f2515865289f57ae1163e642901c6e2578f5d37deee2fc33cf29cb9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMBZ92388414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a829b698bde03d557efdda78d628ae362c8f5ab406a440ea3eacd64c0b7107a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:17:34Z), 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/QMBZ92389424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd790a8336a6f3ee317095c373b45171d11171d9b5cfb45d652b443315adfc51b. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/FRX872399628.