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 0xf73b426152e996031aef7d1910d91233d740555f59aa0dabb43b96411209698f. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0ea184a-8a8f-42d6-ae4e-4e4a071414ce.json and https://artists.proofprofile.net/proofs/artist/a0ea184a-8a8f-42d6-ae4e-4e4a071414ce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 2 in C Minor, "Resurrection": I. Allegro maestoso
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 0x61fcbb39d0fad7d868700034c4a4b88862420e1f6b9a7314e698e8370568971f. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CDAD60704001.
Symphony No. 2 in C Minor, "Resurrection": II. Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7ca284d8d2e069f3ee8e7cbf1ce9a5c3ec71a9d340ffb122bc1f6d011e2a0f. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CDAD60704002.
Symphony No. 2 in C Minor, "Resurrection": III. In ruhig fliessender Bewegung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd778a15adaf69a3a17c5b677360d4fb6422fd1609d136bb3b2e00f3570cab5ba. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CDAD60704003.
Symphony No. 2 in C Minor, "Resurrection": IV. Urlicht: Sehr feierlich, aber schlicht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e4a3daba130425cc2ff86f7f9350f6d197c4e9da3c8f3470de6678435f5ba9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CDAD60704004.
Symphony No. 2 in C Minor, "Resurrection": V. Finale: Im Tempo des Scherzos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7f64a6901df9d047f7fb75d104c249f1a5742ae5188f16294ce3d33cc879af. 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/CDAD60704005.