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 0xd2008b8a9512dc404ece0c0786683e068b82cacbf7d1f9a3364869d0470d236b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b27452f-db74-4e03-bffa-bf33821436b8.json and https://artists.proofprofile.net/proofs/artist/2b27452f-db74-4e03-bffa-bf33821436b8.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 0xa045f110425d6ef1531ca7aee18ca4b639ff6aab9467bfee900d3ff9e83f94e7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CACWV2550033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe63032201b03dd69be41a441500f28790c5ca973710f19b33143f431a743839. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:27:37Z), 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/CACWV2550034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c52c6c3392673244fc491f039b853c176f0478bb8a2e410f5f2fc8f3c72338a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CACWV2550035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02c3a5dc7bc361bc34e82e7f04ead486fffe38948d0b717157d2dadb5071789. 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/CACWV2550036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9fb8d1c3ddc4bb38df5eb6ed87a4bc8025bf27d163c8ba9f1f3e22c394ae10. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:12:11Z), 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/CACWV2550037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4222c9474eabb9a0ff7e5467389e7fa3d4ea1729d3e2aff5182284307b27865b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CACWV2550038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44dcb08ae2e7af76e73367d2b7132ee1a5df918a73e5aedd1f23e8bdd6c8149. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/CACWV2550039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92babf2d6f7f047fd70ae0b4d026143906c70abd24a602b77d0428d33dd249b6. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:59:36Z), 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/CACWV2550040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a601639b0aedc4cc935e6dc1aae011b927270d5c0512c7c8f9d7f87fc1ba17. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CACWV2550041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9ca09c7801fb792359dcb3f91b47415cc9014c73d617843580281bc2e89907. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/CACWV2550042.