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 0x530e9cea257bb18507e6cd8d525a99e649b628cb5b760c0e806f4e9a702a5217. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6f6e87f-019c-424d-a1bc-ae9dab5638df.json and https://artists.proofprofile.net/proofs/artist/f6f6e87f-019c-424d-a1bc-ae9dab5638df.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 0xe654f1243c110e16afc4ced2985a14fd5958e6852b77a72b8a113bce166fafb9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZYFZ2343604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9709c71b4d65156e1735d137631155969758f1731f734df3f64e4ca48761b0b9. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:03:25Z), 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/QZYFZ2343601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c2be5525034d842c27067756e4ebb900c9fab273a9f94a7dfdb6988932825f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZYFZ2343609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbc23e665d0dfa3ce6bdc43beeb89b05363030b606ca6453f9fb6c01e8bcc48. 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/IDA832404002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7265148852d312d89c8d0aed6d72a9c0f695ec5110c354886e145780fc1a0117. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/IDA832404027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215aea809cf873be683b14455fe397e0664fea8d8258f795c46ba8a8d56794c3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:39:39Z), 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/IDA832405149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcd1b09f6c4dd6c1dffeb4eb976ea8b4a07de17cb9732ae126731671009aa31. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IDA832405152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7655d0ba117aabefc4943e3282b637f0cdafb2d34b70bb94272f6e30268f5957. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SGW502234687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a40ec38b7f5692f1f50dfc5d45649dab85756536e75a08710eb111984ee377. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/IDA832500952.