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 0x07178f9ffaf08aaa9bb82824c64e0361128b25c62bdd957513d1ec075025b734. 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/fc6f78a9-516b-4818-a828-efe1a098abf0.json and https://artists.proofprofile.net/proofs/artist/fc6f78a9-516b-4818-a828-efe1a098abf0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Biscogli: Concerto for Trumpet, Oboe & Bassoon - Sammartini: Symphonies
Concerto for Trumpet, Oboe and Bassoon: I. Largo maestoso - Grazioso
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 0x28a494dd88bfb21e8adecdec1ef9aacf0bdef19336f8f8bc40dc7152c969a61f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ70056061 — a six-check JSON result.
Concerto for Trumpet, Oboe and Bassoon: II. Largo e staccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecc6be754df6e5f5a213747d3b574ba61462fc9e81b1f3f0ed3b5278c585d71. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITDQ70056062 — a six-check JSON result.
Concerto for Trumpet, Oboe and Bassoon: III. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575a1b18f63435c1dd505a73d6c712c9037ec2cf999a9fbb0647fa26d9233f61. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ70056063 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90489333d4542461a1b15318b3dda0bad1f11afd9fdd80b06cfb1610240f5528. 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/ITDQ70056064 — a six-check JSON result.
Symphony in A Major, J-C 62: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc292b43ca90aaf63a324466698c59d12be41c6a04297696a7cc1c6c09338f298. 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/ITDQ70056065 — a six-check JSON result.
Symphony in A Major, J-C 62: IIIa. Presto assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b519fd3e20d0d64c4071b2e04c9da8e97dddf816fb51dfbcb14e97df75e50fb. 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/ITDQ70056066 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af3e788ca3179a8cd7381d9d0e7513bbf53bfe62c1dc879e95b6b5c58fe5b0e. 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/ITDQ70056067 — a six-check JSON result.
Symphony in F Major, J-C 32: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59e98cea288d8da6615c9370dc8b7a9444ffdd1257ac858893576367133dbfe. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITDQ70056068 — a six-check JSON result.
Symphony in F Major, J-C 32: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79ca49188964b92afe510ebf1c85ff70a1de3aa035c52f5edb709bdccb7c551. 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/ITDQ70056069 — a six-check JSON result.
Symphony in C Major, J-C 4: I. Allegrissimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca34c08c62b14f612ba410aead06dfcbb7439c24410b21e400f2fab2e561371. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITDQ70056060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c672b43d5478959803e558ab489689e0f71d41f04f4bb2a92e1a8db3c582b. 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/ITDQ70015606 — a six-check JSON result.
Symphony in C Major, J-C 4: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee510c3653fa11ae801c3c7e1a4940c117c3187007aa10e8b496c0a976bb6878. 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/ITDQ70025606 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf3b474d28cebdc353a3d02bbf443aad6ea530a6f1573e02cc9b8dcf83dc17d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ70035606 — a six-check JSON result.
Symphony in G Major, J-C 48: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf589d815f818e3a8f3e7996792666a4eb5b3c90ec2ec6f56414eb171ea78c3c9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITDQ70045606 — a six-check JSON result.
Symphony in G Major, J-C 48: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497f53130e6622db7148a3eceaa15e5df9767bea51807141891e9e92e188e47b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITDQ70055606 — a six-check JSON result.
Fontanesi: Four Brass Concert (Trumpet, Trombone, Horn, Tuba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c05e8d34b3fc15eac555328fc4b821496d51fd0ab1d5f9fce1c6f6ff59477b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITB281200070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c05e8d34b3fc15eac555328fc4b821496d51fd0ab1d5f9fce1c6f6ff59477b. 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/ITB281200070 — a six-check JSON result.