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 0x8e4eff3e0f144847fced647a72c8d53273b0399323edeed28b1d524f8fe2e8f3. 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/d5105252-d6a3-4345-9085-7c25d70bd72c.json and https://artists.proofprofile.net/proofs/artist/d5105252-d6a3-4345-9085-7c25d70bd72c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Massimo Colombo World Ensemble (Chamber Music)
The Piano and the Other Side of the World
Relazioni e rapporti (feat. Paolo Fresu, Franco D'andrea)
Acoustic Weather (The Music of Weather Report)
Romantic and Impressionist Piano Masterworks
Merry Christmas From My Piano...and Surroundings
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 0xe6ae3bc27b874ea2afec0380449cc5e7bd234ebb9696647f5d3b7a9156aa9c94. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBAZM2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5862898c161da8579f4ae181fef4d740567763f0ea7df80e3b645585604332. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:48:48Z), 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/GBAZM2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf5887a57c36e3559cf0229bdb2e2c367dea5e06c8eb186f019cc53bd43f779. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBAZM2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caaead65514623742b8cab596122ac5efb371374127e362f9606ada7af9a3dc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBAZM2000015.
7 pezzi per la mano sinistra for Piano, Op. 269
25 Pezzi Facili for Piano, Op. 231: No. 17, Americana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7eca2b15a3cd2f1384e7baafa9fd0974651ae9419846e2e34ab87fd0dbfbdec. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ITDC82000121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e061e6b0e710e7afea041cabd5f8c6b490d3207c5e5d44f8f7b6d90b02313. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/UKAZM2300068.
Concerto for Piano and String Orchestra, Op. 733
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0845d90a4a54212c2502e67113c1e6d730239cc0adfbb2372adf96f1821bdac. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/UKAZM2400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb700a82f4f74f8805e662fc70d284b0f9bf9626fb937d33dd28165e13b10ab9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKAZM2400156.