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 0x3515ce72055831818d50232e45d87d006501518ad1d1a76d56edb7021b241f2b. 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/df60e7f9-00e4-46d0-9a46-ba4dc10ef56e.json and https://artists.proofprofile.net/proofs/artist/df60e7f9-00e4-46d0-9a46-ba4dc10ef56e.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 0x43e0688c495e17198ef720c30c5cd104e358de2293e5eeb49c2f4ce1f22d109b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBSMU6603517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96e7baefb00d1f2c1f8eab6af06d5cd27183b4e4782075295e332ca20581ee4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBSMU6603519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee7a65ba13a8aa903f20e3c318ad3a2a0bbadfd7eb12152f51b1ba6ca4051e2. 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/GBSMU6603520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c1f1ca91b40463a3c440430a65b32fe85b03f9963d6e8f81eefd6ba74ee5ff. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:29:07Z), 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/GBSMU6603521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab9f7c991178143276310445ef79106138d0f299d36bf1ddf82735a7c362524. 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/GBSMU6603522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d93d487a5b26669268176ab03c184084557061962db58d987a6b875355f3f6. 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/GBSMU6603523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36bd59a230b239c8bdfcb32944bce197b3f849864ecab4999b42ec1d0038962. 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/GBSMU6603524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9cc1384c7201b1575d7a90250d15c6aab73a304b4dbf66a256a6b97630d19c. 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/GBSMU6603525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a573e62eb9ba44de876845407d416549a2b451c7a4ad39cd9fbdfb34b9b340. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/GBSMU6603526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26711b540b2a1b0317c88ab2458321bc8b5ab6c010c5d5206c65081dad5b320. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:11Z), 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/GBSMU6603527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a5845ac731d2e53e658ac0fa9ecfb6eba45977f9b1e4e71bb73ca09990c5c4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBSMU6603528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0051aa3d09cdee28b543e7ba6f8c512d73779e6c891a4d2c8130cca6421c763b. 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/GBSMU6603529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b93d5e88ccf3ad8e7b44dfca50d0f200623ae372b9bcba48e93d463004620d8. 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/GBSMU6603530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631febf99055fbf0576e610ffbf87d7967e9ee3c5997e8518ae27943094fce44. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBSMU6603531.
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