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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ec4fd2c8b020543df616728f5794847403dbbc57af41c8f0275e3f33ebac17. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d3b35e7-bd13-4231-92f6-c1429db311d0.json and https://artists.proofprofile.net/proofs/artist/9d3b35e7-bd13-4231-92f6-c1429db311d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il Flaminio, Act I: No. 1. Canzonetta, "Mentre l'erbetta pasce l'agnella". Andante (Arr. for Brass Ensemble by Steven Verhelst)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1fa938f2664dc4d877af4c36f74527a928ee438240fd38dec3cc38dc1eff2c. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLA460914162.
Arie Antiche, Volume I: No. 22. Se tu m'ami (Arr. for Brass Ensemble by Steven Verhelst)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52027f46bda52a4e51871d89f989b81b1ae8e34e5636355d8a9af92737b66d28. 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/NLA460914166.
Pausanius, Z. 585 "The Betrayer of his Country": No. 2. My Dearest, My Fairest (Arr. with Trumpet, Trombone, Cello and Theorbo by Wim van Hasselt and Jörgen van Rijen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8706865733aacad0ed08c61232cebc4dd93734d20f590cd2703ad389ed4c343d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLA460912815.
Timon of Athens, Z. 632: No. 2. Duet, "Hark! how the songsters of the grove" (Arr. with Trumpet, Trombone, Two Recorders, Cello, Theorbo and Organ by Wim van Hasselt and Jörgen van Rijen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e48069b2e765bc0c458355ab86a22df5ae9ec3f665176f01c877d8992ddf5b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NLA460912816.
Trio for Trumpet, Trombone and Piano: I. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3449f48292e651a22196f1a1868cfe420c4e7ad515e1b53ed7d8b377cb45c0cb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLA460912818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7487cbf4d0d456378fe339e65c6db2aa2343e80d1cc01326a3e20ec784142f75. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/NLA460912823.
Channel Classics 30 Years - Gramophone Editor's Choices
Imaginary Mirror: A New Reality for Trumpet, Percussion & Unexpected Electronics
Spiegel im Spiegel (Arr. for Flugelhorn and Percussion by Koen Plaetinck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a43b1113b13661aad1687057f676a5be2aa0e4bf5b278f2d587e99e78aecb1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/NLA460914844.
2 Mélodies hébraïques: I. Kaddisch. Lent (Arr. for Duduk, Posthorn, Percussion and Strings by Koen Plaetinck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98556aa721704a7117aad0d2dda7ed0cf25310e40ca4cbcb09698dcd584e38a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLA460914849.
Chant d'automne: Works by Hartmann, Grunelius, Hindemith & Fischer
Eine Deutsch-Jiddische Kantate: V. Grabschrift, "Stille ruhn oben die Sterne"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2153fc6ba708776070b22b500770e9e9d293f39e0cbb6f32657636f78378fc1a. 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/NLA460914061.
Composer’s Portrait, Vol. 1: Eine Deutsch-Jiddische Kantate, Tsuchigumo & Other Works