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 0xacd5585c5bd0f0651200e6a46fb92a9f5305a8a79e043c49387e0404daacabf7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eda9c638-b894-4dec-9d7b-4744cdfa44a2.json and https://artists.proofprofile.net/proofs/artist/eda9c638-b894-4dec-9d7b-4744cdfa44a2.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Stravinsky: The Soldier's Tale (English version), Élégie. Duo concertant
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 0x10b4180809ff3bc01541e0e29fa7c11b70e5481269544f3ce6e1b8b9c386d6b2. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1980010 — a six-check JSON result.
Stravinsky: Histoire du soldat (version française), Élégie, Duo concertant
Histoire du soldat, Partie I Scène I: Marche du soldat. Airs de marche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0211e17bdd82b934986bdeeaf13779a90d710c1e479b152f4e6e731326ae98ea. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1980070 — a six-check JSON result.
Stravinsky: Die Geschichte vom Soldaten (Deutsche Fassung). Élégie. Duo concertant
Die Geschichte vom Soldaten, 1 Teil 1 Szene: Marsch des Soldaten. Marschmelodie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057f5caa5edcc81548976e82311eb6ee597370fdfeee6b5aa8deae69de6a9253. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1982070 — a six-check JSON result.
Via Bottesini: Concerti e pezzi concertanti
Bottesini: Double Bass Concerto in B Minor: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd164f2de540e0694173ca18e69d3a463a64c0caa1732cbbfcace43a96e3d5de5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEA031900110 — a six-check JSON result.
Bottesini: Double Bass Concerto in B Minor: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251b903e3a9ba0f1a10b2f4c76fe25616e28ad36a81676eb5eabe44c8503d565. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEA031900111 — a six-check JSON result.
Bottesini: Double Bass Concerto in B Minor: III. Finale. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e1d406521c80fcd763c50a9058bd3256f61b4f695366294c62dfa9f61dad6c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEA031900112 — a six-check JSON result.
Bottesini: Grande allegro di concerto (alla Mendelssohn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bdfdf804b106205ed121e308f37d8ecc39738c37595dd4993a6f75145198d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEA031900113 — a six-check JSON result.
Bottesini: Gran Concerto for Double Bass in F-Sharp Minor: I. Allegro Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6868c67496d3821d91647ba53522edff1eed4b18ecff5528adb19054a76298d3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEA031900114 — a six-check JSON result.
Bottesini: Gran Concerto for Double Bass in F-Sharp Minor: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a6b72fe6a6d6f612e941c39fd15141b95fc4a9391e9844860ef19c0773c503. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEA031900115 — a six-check JSON result.
Bottesini: Gran Concerto for Double Bass in F-Sharp Minor: III. Finale. Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa097c859cf5ae73a66f8b2bf37182af4f98452f34bc58564cdfe8effbe647563. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEA031900116 — a six-check JSON result.
Bottesini: Gran Duo Concertante for Violin and Double Bass
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfd838a9f50aafb24dcb5e4f58e4b6956e6dad35696e5c37e12979389c075a9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEA031900117 — a six-check JSON result.
Glière, Bottesini, Jongen, Hauta-aho & Piazzolla: Chamber Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8068e71baef0cb62bb206155fb437bfc5d1a544d9b2d78d93f9af92c09bbcceb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901643301 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fada1af502d9757454d28177aaa2e95c82cb28dbb02fedcb56a74a33a0b92d9. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901643302 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4527030dbd943664067bce18a3a527f7ddd4fbad66588b4a93b3142f41b503e7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901643303 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32314eb448c00475d112461131ffbaccf014e42eb1aaf5d101b3708f9378ebf7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901643304 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a65fd96ece2413693f39ea328f2ad31b2939e968b0f6c758688c999501f57c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901643305 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec2a4e525368cbcfbe9552fd4692006cca34bf0aa19f874dd26780ec6318e35. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901643306 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133c521e9269f348445f10125ef89039414fe3d2653a3145c0193e865fd7dcfc. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901643308 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd499af999a5e0ef258de6f92fe18f5c3aeff74096b35bce4e9a37e845f204d. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DET901643309 — a six-check JSON result.
Rota: Divertimento Concertante - Chausson: Poème - Ravel: Tzigane