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 0x82d30d91b2c55884a0d8bdf0834c89028d26fad6d6b6389ed7e40ed99139f9bd. Chain 2 (Bitcoin): anchored in block 953864 (2026-06-16T00:30:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0417b267-06f8-4f46-9cfe-ef5e10dfcb84.json and https://artists.proofprofile.net/proofs/artist/0417b267-06f8-4f46-9cfe-ef5e10dfcb84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hugh the Drover, Act I: Pt. 18. Who'll Fight? A Fight! Who's for a Fight?
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 0xc3bb34197ce27addb8d22c91ec0e4e2ae994e160ce7ea077c16bc3ca23c1ba40. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJY9490118.
Hugh the Drover, Act I: Pt. 21. Alone and Friendless, on This Foreign Ground
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9657942388a34bff9c82802abc47d164a8f10af248113785d6369cbeb51730. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBAJY9490121.
Hugh the Drover, Act I: Pt. 22. Are You Ready? Go!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b9578142e18d373ee82350585f570fd40b311ad486824ed76ccbafe06c4e53. 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/GBAJY9490122.
Hugh the Drover, Act I: Pt. 24. Oh, the Devil and Bonyparty
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82919db7721ab58af51984f27f5d864267d9d339078e643a8eeafb44035d1c5e. 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/GBAJY9490124.
Hugh the Drover, Act I: Pt. 2. Who'll Buy My Sweet Primroses?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17935e8e3870c6bb3141731d4cef1bb99e66507d17c84f51e1c15cdf511305c0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBAJY9490102.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Hugh the Drover, Act I: Pt. 3. Cold Blows the Wind on Cotsall
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e5897ead55bb74450bce2b9cf2e80b7dafde29f3ed4d2f124c5d61c2fa4428. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAJY9490103.