thumbnail|right|250px|The Stridon bishopric seat in the Roman province Dalmatia (in today's Bosnia) on a map of the Roman Empire about 395 AD, from Historical Atlas (1911) by William R. Shepherd thumb
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 0x0b97c28a2470730c9c20d165354f40175675d19e1ae7d234f8c463cf72cd1dc7. 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/fd6cf2cc-30ef-48c8-939b-7eb0714f636c.json and https://artists.proofprofile.net/proofs/artist/fd6cf2cc-30ef-48c8-939b-7eb0714f636c.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 0xc176851782c43a001eb89ad0fa52e137fb315960110a9f3957ca6080278243f0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ROROT2304940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cdc31747b32f2b1005df67bd1780832e4816c21ed33bdefcaf8ccf366ecd6e. 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/SE6XX2377922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f3c04afd332b162ab39537888c022a596dacb5fc02fe998398c5b3a77a1746. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFME2392600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed6846114cd9bc6bbe0d21fb751bf496e1dd28e6a7485f2e6de7ff78901f675. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV62402661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b5284b150d3203e7096a3bf0f10c96b8e0c9936e1b1af4d35cfb8dfd22115. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2467991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb316825de1aac934267777555e5b08923fdd5297fc0781782b029c8606a8618. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA62387117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db58edd01ff265b49ae8316c916e9824a8f1e86044c36134ef533330fb3d093. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ROROT2302580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1603409af9697512ffb45d96ff4f088e15254cbf59a9e084ad50c760d98c3916. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL2QC2101016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116d924d7fa03a21932ba1a3f1fa0e4f39f711939e738ad6256140e8805afaa4. 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/NLT2H2200719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ae9cfc0296470d92ef4f7ab467652d7e7e725741e961ca33f87ab9fc4e71bc. 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/QZES82139717.