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 0xb7c32c26465f2ea622c3bfc6050345d819803d81cdf03d552ac7fb787eff022d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c8a5077-0eb7-4803-bf2d-0a1f8ea954a7.json and https://artists.proofprofile.net/proofs/artist/9c8a5077-0eb7-4803-bf2d-0a1f8ea954a7.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 0x3c9c5efb089a3d972e56df998188aebed75c03a28e911e0b34c4e2998133fb13. 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/QZAKB1910108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5d7131304834c295f6d8b5f85adc39229245a8debe886469256f5eb0764b44. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6N1984444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4264aca8cf4df004cf4955752a1219070aec51d3e9a50fbf9fd828e200bb76. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:54Z), 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/QZHN82000280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca12e89bd13d74c37461b1aa62b4d2bc0da3368534e4e147e4f1c786c4f0ae81. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:31:25Z), 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/FRX872425489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f35400092beb763e1cbcee9132face866058d05e4e16b8862f9298702928154. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USANG2007684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66812f95268b864ea1486992e1ae17530dcd42f7ece7a01f21a25b45130336b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL1LE2102196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856b2c06386b634596c693097d2331828ea7035f5a8dcf1619e2d6151dee2a7c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZAKB1910650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c2ecd0bc277d07ece0a24999f32975405055db42a8559fd91b7394c9d92f81. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN42424726.