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 0xd1390dd68b5dfcfddd4627e610f583351adac68b5d0610eba76b627072df04ec. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d865473b-78a3-4a2e-bce7-389ac3280d7d.json and https://artists.proofprofile.net/proofs/artist/d865473b-78a3-4a2e-bce7-389ac3280d7d.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 0x2ff07fa4a9c88c57d9d7e26eb77dbd42a6a83c350fb48b2e7fd38bb1cb2b0a02. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GXBNP2305018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11afb216b1405efcea2ebe13301b17d7765f4aa14765fe3f7f3574f41e433491. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJY2439126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82565bcfdfb75c62025438cccbdf9ce08341cb20a134f4cc1a382dd131cc3905. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZTPX2429372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3d2d3d24b4f0aeb400afb1019d987dcf193e5d554914458b069fd8a48f119e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:01:33Z), 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/QZW9K2491110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066b1364cb61c460043689e194b7742423473c8fccd63d49bc928847aa0944c9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US7VG2536886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f05b51fe43ec2f0630f18f96196f20f23a03e7c0166a0f145fd253ed8224ac5. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZGLM2534178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3692edf34d4ce43e7b7e64bd8a55e5ade6d479cb9e2869bdbcac3b29149a13. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:19Z), 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/QZGLM2534179.