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 0xb25e7b59b8521748dfb62706cff8c9760b54280df0b9aca5a92fcb6993849a1d. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae5e7035-1715-420f-86ae-4ccf509339c6.json and https://artists.proofprofile.net/proofs/artist/ae5e7035-1715-420f-86ae-4ccf509339c6.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 0xf210c03b9b4b0335f6f1ab5e4996812bfe14f6757d774d944545fbecafb284c4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:48:53Z), 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/QZDA42374612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca2fa51bea6ca02a2967565611f7b8a193d80002b26e0ca586e9d9b100a1cd8. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZDA42374617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74cca52a532e60b1cd94ba6d41e8946e1b4b3449e25ed6017d5b295229b3a7b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES72311119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73007ca82d978740c43e71bc15620b74b9471b44dda5736e764467e86bb8a0de. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:48:16Z), 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/QZHN92595946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c77c939e82f31721291864b7fc4515853012bc625b04d0a97eb57d3f13b8ea. 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/QZHN92595947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c60321c78c26bc06116b8f4a59244f4d9e6641ef5117358bef29547e92610c. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:04Z), 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/QZHN92595948.