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 0x7a3fe7de2cf6e00717fb0cf9013b8c103dace55c0edba6ea6f771739d7e5e1bb. 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/20e5300e-1a44-40a9-8dd4-5101aa65148c.json and https://artists.proofprofile.net/proofs/artist/20e5300e-1a44-40a9-8dd4-5101aa65148c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trial by Jury: Oh Gentlemen Listen I Pray (Defendant, Chorus of Bridesmaids)
Chamber Choir of the Royal Welsh College of Music and Drama
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 0x5cf296087140d52764959522393b71d43f20b07e415478a65efc6f21aea2e6c3. 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/GBLWD0506827.
Trial by Jury: I Love Him - I Love Him (Plaintiff, Defendant, Judge, Counsel, Foreman, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b2c0999d36a440516218652d4979b4f78fb5d7501f9e3dff8fbd15ad79fd31. 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/GBLWD0506830.
Trial by Jury: That She is Reeling is Plain to See! (Judge, Foreman, Plaintiff, Counsel, Defendant, Usher, Foreman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83a287ccbdb37f71ba7b98b33b8837264243fb2ac04ecb9e79a2251af1fd77a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLWD0506826.
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
Trial by Jury: Oh Joy Unbounded (Plaintiff, Counsel, Defendant, Usher, Judge, Foreman, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88c91b8f333829614d4b0c155ff5f7eeb3b65502409f0b5e0d90b9e002f1056. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GBLWD0506831.
Dido and Aeneas, Z. 626, Act I: Cupid only throws the dart - If not for mine for Empire's sake - Persue thy conquest Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f85671468041cfc741caed0c7655af22a9f6cff7abbe897ca13191d5ea205. 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/NLE422303206.
Dido and Aeneas, Z. 626, Act II: Behold, apon my bending spear - The skies are coloured - Haste haste to town
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd08a2e9dfb59328e6dd1e19296a80f565a5e9fd8370b49ac5d7319bbd9f777. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/NLE422303215.
Dido and Aeneas, Z. 626, Act II: Stay Prince
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558ea45eab4f3329231e00a824f4a6474c91a697f0a0866ee69d98857c3df693. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/NLE422303216.
Dido and Aeneas, Z. 626, Act III: Your counsel all is urged in vain - Great minds
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45511731ad34df4a3ba88008e0dacd3ea52247a1774b0846c1fc132e56877150. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/NLE422303220.
Matthäus-Passion, BWV 244: No. 16 Evangelista/Petrus/Jesus "Petrus aber antwortete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd10763fa3e2c5590f9f4043d9909873580a1727adf7952baf989934170c185. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH1262001224.
Matthäus-Passion, BWV 244: No. 22 Recitativo "Der Heiland fällt vor seinem Vater nieder" (Basso II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c41563d704707978096109c8775bf8d8545f44d1e28d8bb28244a2b4ec61c8e. 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/CH1262001230.