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 0x78348e7976389b715f49773185929e27049320ceae726adfc925c6270656c0ec. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85523514-1218-4d12-9601-f4f3d0fff4d3.json and https://artists.proofprofile.net/proofs/artist/85523514-1218-4d12-9601-f4f3d0fff4d3.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 0xfe55a023ec357f501d1739eba4f8cabcb915dbb10093034c068cb3f235f6c7d9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6MZ1703449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e501ff6845074018e194edc06b5193fe8d2a430f1c6477a6246cd1f60f2686. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:27Z), 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/QM6MZ1703450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e61c760c36f8a95d0b952cfd66c69b738843e623e275d58d3a8ca8aef91720b. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QM6MZ1703451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8971b6861db8d437332ad35ebcc8cadecadafde4219125a96dfdda277187c75. 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/QM6P41804493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360f76539742bf8a8abe175277585de624230f188ac8c873ae4df93ccedb7f63. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6N21917604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035ed491f56768cd747a2a686a156c776ac1ffeb18d6fabc6d4942de2aec6bc2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMDA62157289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7167fa0af355e57827a084b4b974220c5b701d7a56c7f7eb7fd78d6dd5593e. 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/QM4TW2132485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168cd08633ffac2c9104c8819b4e06f9b00ec84bb33f8e1405958d62aa3fc639. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:21Z), 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/DGA0R2486499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47769bbc9b5a06ddee7c48f9caf96731d9196d007f69ed0cc0a35393f2f69065. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:03:15Z), 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/RUA1D2539705.