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 0x96bfc41469c8c82c2001801ec0c7c701f567ab8821f8813616131ca8bfdf7e7e. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cc6af86-5e47-4d8b-bb1d-642bfee56e2d.json and https://artists.proofprofile.net/proofs/artist/1cc6af86-5e47-4d8b-bb1d-642bfee56e2d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mass - A Theatre Piece for Singers, Players and Dancers I: XVII. Pax: Communion ("Secret Songs") - 2016 Remastered Version
Leonard Bernstein - Soundtrack to a Life in Music
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 0x62922593f1b5b0159120dd9794375e17af8f01efd9ade49cc9e4c0708b42a4b8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11605272.
Mass in C Major, Hob.XXII:9 "Paukenmesse": II. Gloria: Gloria in excelsis Deo. Vivace
Haydn: Missa in tempore belli; Missa in angustiis "Nelson" Mass
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf8725cd8889b8c8e449feb4c7eb504adcf84a163f05d596cb1c603bb4dd94a. 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/USSM17300567.
Mass in C Major, Hob.XXII:9 "Paukenmesse": II. Gloria: Quoniam tu solus sanctus. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49895d97ed670fe5982ba2b2d81369095a4c3d9926e9d5576f29222220004d7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM17300569.
Mass in C Major, Hob.XXII:9 "Paukenmesse": V. Benedictus. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c61ae8dc4d40640623a6ee886477d0003562ee7506c304211f8134a4d8bffb. 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/USSM17300575.
Mass in C Major, Hob.XXII:9 "Paukenmesse": I. Kyrie: Kyrie eleison. Largo - Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe535f515a06e088d48714b02c3d2bbb4f6f6b063f2208135f60ef740df1de7ea. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USSM17300566.
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
Mass in C Major, Hob.XXII:9 "Paukenmesse": II. Gloria: Qui tollis peccata mundi. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2db4d3a257955753020d849e8f149a8db3016320b7a893b7936bee20af5024. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USSM17300568.
Mass in C Major, Hob.XXII:9 "Paukenmesse": III. Credo: Credo in unum Deum. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8d83b7c8cc2736a2d361758d0cbaa6bd351fb5fe2ad8d9526787e14d27530b. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/USSM17300570.
Mass in C Major, Hob.XXII:9 "Paukenmesse": III. Credo: Et incarnatus est. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e709bcb7980db32832435bc86eae44fd806f4f72db1af1c4e2d1bd4de4b8f5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM17300571.
Mass in C Major, Hob.XXII:9 "Paukenmesse": III. Credo: Et resurrexit. Allego
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2689d5b1974c9c11bab05ea4dde2017db4da058ee41d99fe79a37318f2fd812. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM17300572.
Mass in C Major, Hob.XXII:9 "Paukenmesse": III. Credo: Et vitam venturi. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb7f48e56a6d8855f6397ae0d9c2e53ca05fb4570ead27196b2f0612cd86e73. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/USSM17300573.
Mass in C Major, Hob.XXII:9 "Paukenmesse": IV. Sanctus. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85918f8cff96245897d6bcf8aa89953748343fd91a1afe408b61c999db2e3e5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM17300574.
Mass in C Major, Hob.XXII:9 "Paukenmesse": VI. Agnus Dei: Agnus Dei, qui tollis peccata mundi. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af818296aa2711695ccc6a7489a6db40dc04b1ed65bad6e3af8232267748abf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM17300576.
Mass in C Major, Hob.XXII:9 "Paukenmesse": VI. Agnus Dei: Dona nobis pacem. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b852519bca87ebca2cadfd77cdc1c30550549e5deacbe3aff93bf0b19489733. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USSM17300577.