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 0xdd699fda7473b13ec7c97a50eda3626134174ed3996bc6077f66d587b55efd16. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3482c71-6642-4236-9289-8f01aa4f8462.json and https://artists.proofprofile.net/proofs/artist/c3482c71-6642-4236-9289-8f01aa4f8462.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Caccini: Nuove musiche - Piccinini: Works for Theorbo
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Requiem aeternam
Michael Haydn: Requiem, Symphonies P9 & 16
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 0x2e149c83f164cd3376f8d9db8833369be56426f57291d73c8189d39517fecec0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEA140424501.
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Domine Jesu Christe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235fafbe574240918e9dc816f0ee7afba0ed8a7d33c460fce1d8db558dcbc1b5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEA140424503.
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Versus: Hostias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85e39a85476cad9a90f9119aedc8564969bfae9b13ae810296c7dc395b69b02. 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/DEA140424504.
Sinfonia MH334, P16, G-Dur: Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee11be262c0385248325b420af1ed3886b9cf79e26fdced52b5ee937146817e. 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/DEA140424511.
Sinfonia MH 82/184; P 9, B-Dur: Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f259f6244442a90800547316918067d67fd269958a5361a65dd91b0fdf10a00. 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/DEA140424514.
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Dies Irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce11fcf897bfb3a4e750a48a62b9077ecc51fa92bc30059d41e2450aadce274. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEA140424502.
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
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25351cd6e3c69063f033d162a300e97c62db6bee249834e17a0d20719f39f4b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA140424505.
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ba488c4692b1dadc29c17fdf1293c345f91bdaf16918a7a6f3bed18dd0796. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/DEA140424506.
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Agnus Die
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190cb54cdb4c1d57572853bd907aa468437865e670381022b9acf5062fa56b08. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEA140424507.
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Cum sanctis tuis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87558c6bad85989fcf9a7672d7df074a798480aebb42a92278c2e4d1f7f99241. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA140424508.
Missa pro defuncto Archiepiscopo Sigismundo, MH 154: Requiem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396ebdbac74ff2d907a25e6d4a551fc9b722821f37f65504bf8b060a32a06cd7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEA140424509.
Sinfonia MH334, P16, G-Dur: Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a1fdb29a9bfcb0ec228cfe0da05c8eb5b5142fb922a836acda7fd82223a77. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/DEA140424510.
Sinfonia MH334, P16, G-Dur: Finale. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af74e029ffa386a5d7e96339847934f2b9a74de357501a8209f796b20bf6be0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA140424512.
Sinfonia MH 82/184; P 9, B-Dur: Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f291314065239f1a520622bcc13ae91fb835b14aadb1c36709c6811f957d04. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA140424513.