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 0x43a78264ced502331009a0a3e0368dc7b43d91bbe2fc259673fa24941af59007. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fced218-5ce1-43b3-86f2-911bf42cb5ea.json and https://artists.proofprofile.net/proofs/artist/9fced218-5ce1-43b3-86f2-911bf42cb5ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piazzolla: Oblivion (Arr. Barker & Balsom for Trumpet and Orchestra)
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 0x23d7011c1d7cc442589cfd6048b97ad8639a908498be2776e951c3e131bcdeeb. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAYC1402142.
Satie: 3 Gymnopédies: No. 3, Lent et grave (Arr. Barker & Balsom for Trumpet and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8e5b45d4c0113c8f91134081db6668af826550651dec82eb859b68c3c6f8a1. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/GBAYC1402149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9dfa3ee2977f9a3c67ed5ed1d621390e5adcdffd84d7e5f0fc23915518a56e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1402150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8e5b45d4c0113c8f91134081db6668af826550651dec82eb859b68c3c6f8a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAYC1402149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d7011c1d7cc442589cfd6048b97ad8639a908498be2776e951c3e131bcdeeb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC1402142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e61c32d828e3488e869f3384df7ec28032cf4ddec7d84365d0ce1cbde926f90. 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/GBAYC1402143.
Messiaen: Vingt regards sur l'enfant Jésus: (Le baiser de l'enfant Jésus): I. Très lent, calme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5aa9525a8b308b449151604a481c92a188cfab82e085d8b7e2eee95ca26499. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1402144.
Messiaen: Vingt Regards sur l'Enfant Jésus: (Le Baiser de l'Enfant Jésus): II. Modéré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4c2a3a014c3678b0032421598c93b8f8ec8d0b66efae77b9fb7ff35fb2c7d9. 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/GBAYC1402145.
Messiaen: Vingt Regards sur l'Enfant Jésus: (Le Baiser de l'Enfant Jésus): III. Modéré
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46062b8a2e15cc52a3b655fb4c4cff22a03a87cdd28a3543807398853e7b6c1a. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/GBAYC1402146.
Ravel: Vocalise-étude en forme de habanera, M. 51 (Arr. for Trumpet and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4462f5c81f3471c6743682bbede175abe6a3e946d095ba9bb516977cef6d620. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1402147.
Ravel: Piano Concerto in G Major, M. 83: II. Adagio assai (Arr. for Trumpet and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545235e631aeafcd5c57950bd2f3e61d332b6208214d8c2371bb4afcc3f4c799. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1402148.
Satie / Arr. Barker & Balsom for Trumpet and Jazz Orchestra: 6 Gnossiennes: No. 3, Lent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85040e89801067febc31021a12dd5445923dad1a6fd2488428efa4e508e5f0b. 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/GBAYC1402140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9dfa3ee2977f9a3c67ed5ed1d621390e5adcdffd84d7e5f0fc23915518a56e. 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/GBAYC1402150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0717eeed80835b4895b4700b0ae380772082bb976639bc301374964eeb168b02. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1402151.
Satie / Arr. Barker & Balsom: 3 Gymnopédies: No. 3, Lent et grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8e5b45d4c0113c8f91134081db6668af826550651dec82eb859b68c3c6f8a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC1402149.
3 Gymnopédies: No. 3 in A Minor. Lent et grave