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 0x8a212ad010ce89bd4ea545eb9d86c2b29074cf53ebb8371daf89a88cad0b690c. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a26a8217-45a6-4c99-aadc-9995ebe23160.json and https://artists.proofprofile.net/proofs/artist/a26a8217-45a6-4c99-aadc-9995ebe23160.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 0x89df001083edb664f74f334a5da252b2ce47c017f6d5f13fcb4919a15d182da3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBRKQ2455129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5b3d32a4560779b337e168959ae347c0e9d63607a461154d2c782fd4b46fa8. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:02:34Z), 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/USLZJ2552067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe445fd86e7028388748b61f03538c593d419718c05b59175b4ec103567144d8c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USLZJ2552108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf5ee96dcb6b7334622f9b4f57a549ac67ffd98e5ea8b3985722687eccb96d5. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZWDD2421678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d18819e653b94a33b09f1596d23ed12f2810d03f9a3deb02451d7cf9f71e533. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:03:24Z), 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/USLZJ2558194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89df001083edb664f74f334a5da252b2ce47c017f6d5f13fcb4919a15d182da3. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/GBRKQ2455129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947818fea225115f4800e1db213d0c17c5dceb95b83466d354b959aac5c01d78. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/GBRKQ2513338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e1a9f7237e54783276bac5a0054e82ba888d46b12d86ef4345322099265faf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBRKQ2513778.