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 0xc01a2775d1d32ecba01126763864ffc035929d06456e3f5c655f2fca41b3b731. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83442dab-870d-43a8-83d2-5e2b8321f1b9.json and https://artists.proofprofile.net/proofs/artist/83442dab-870d-43a8-83d2-5e2b8321f1b9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi: Flute Concertos Op.10 Nos. 1-3 / Mercadante: Flute Concertos in D major and E minor
Sonata concertata for flute and guitar - Allegro spiritoso
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 0x4cebc4eb388ee72bbd7428fe41f6c63a99d512f77549a66c5612e343968813f1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:30:18Z), 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/ITH000500054.
Sonata concertata for flute and guitar - Adagio assai espressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3174d2df96cd43399933c20c46a4e88a7f2cc17b038c40e0cc699d83411c9f7e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITH000500055.
Il barbiere di Siviglia: Largo al factotum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38ae47707f7b0ca5b4289897606196150b121dc446eb866e30378da58be1c58. 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/ITUM71901254.
Orchestra del Maggio Musicale Fiorentino
The Three Tenors - In Concert, Rome 1990 (And Selected Highlights)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ffbfec5c1fa555eb659716411836c151cdc0fa1e1d75ce02614e9c5bff07fc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBF079040305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910079fbc972ef482c885ba906fef3a4d0e778dc77bf8fca2b69496e4179f212. 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/GBF078400120.
Funiculì funiculà - Live At Central Park, New York / 2011
Concerto: One Night In Central Park (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08730515a406f588c99291fead9b1b5f009407c83237002e8722e1527e820ab8. 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/ITZ041100037.
Concerto: One Night in Central Park - 10th Anniversary (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08730515a406f588c99291fead9b1b5f009407c83237002e8722e1527e820ab8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ITZ041100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cbdf73ec51e4024d19204d9c0efe64d68ea4bca8b5bdd0cd4ad67b521ff984. 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/GBF078400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910079fbc972ef482c885ba906fef3a4d0e778dc77bf8fca2b69496e4179f212. 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/GBF078400120.
Orchestra del Teatro Comunale di Bologna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7908b747531c2955b128d333e9630a7530c3574938f5c88b3e0137549578d0ed. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBF078740202.
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 0xf753a818bf03bbdcd3d70edd2dd6264fa83e8a0ac62e81bddc5f656d7cbc57df. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBF078740207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a481d5e95d06a2ecf6387e1f93e2002096342be94475ecca1f0cbca3aab5eb. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/GBF078740213.