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 0xe7056db01d8d7511c3914d57712cc8a26f12dd306e81302f3c0507971bcd3633. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bec9922-2e5c-4f08-bcc0-da01240445cd.json and https://artists.proofprofile.net/proofs/artist/6bec9922-2e5c-4f08-bcc0-da01240445cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestra dell'Accademia Nazionale di Santa Cecilia
Coro dell'Accademia Nazionale Di Santa Cecilia
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 0x1cd679d66807921bd129dfdbf90e3860032d1e4f51b53c147b3a8a83868f370e. 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/DEF059830115.
Vesperae solennes de confessore in C, K.339: 5. Laudate Dominum omnes gentes (Ps. 116/117)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faa5f1427c603260481763e7ad30895125f5decb1a66337a507b0368334d09c. 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/DEF059830103.
Nabucco / Act 3: Chorus: "Va, pensiero, sull'ali dorate"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807a3d663417b8eb1c70b1e5c0b3e4dde5efe950e5100e43e89e1249fc74d033. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEF059830108.
Requiem in D minor, K.626 (compl. by Franz Xaver Süssmayer): 3. Sequentia: Lacrimosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d3acacc60f53c451ea375240c89aa07a04e787c2139dd2590d9c857689f571. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/DEF059830104.
Die Schöpfung Hob. XXI:2 / Erster Teil: 10. Chor: Stimmt an die Saiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3c7933b1b34a2d0660aec3de797ca88fd72686abcda25c0a39720d394d17af. 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/DEF059830105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4a1f9bcdbe2db84dc71961047dce61703963544fdd3c33e76b38aa3d6172d7. 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/DEF059830111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed11d95e3b7aeb06c73a87c42ca221eb0dc36f5576c2b86058d5be80129e9467. 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/DEF059830112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735bb65da691087974fca8af83ebe0c261d8daf8a8617b00d565a9ca6f5d823c. 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/DEF059830113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953bc202ba04e5d98c22e04463eb095a3e88c2df248676aa726250b0ef19abed. 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/DEF059830114.
Vespro della Beata Vergine: Domine ad adiuvandum a 6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc339aa525e9b6091f7853ac096f361099cf706577b4cfe701c05b1da00503ed7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEF059830101.
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 0x4830f5573f06768830854391d765074d45af73c7c19beb3e5fea8c3fc2e07d1f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEF059830106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43faf3bb48f65a24c715bdeb5f9d05a3a1ebb0bd69ae738c99728059e4b7ed4c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEF059830107.
Requiem, Op. 48: 1. Introitus: Requiem aeternam - Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f5f3e29708c9c7f878ec637cd7151d49521af83e462c6e6e4428fd8d0b71f8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEF059802461.
Requiem, Op. 48: 2. Offertorium: Domine Jesu Christe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4d6bd2ff97a0329a5615df3574f47f6cfc79be65d2709b651b78f1f42060f2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059802462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66d1810c0620ca1fb54c71dc359f5e06f75a623df72808d1a16c9d215f648e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEF059802464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b15254871287b6be1f2ea25be7d5974424be82b12269b5eb5a30ccb56ec434. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEF059802465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a51e860c80d0a03ab845455dcbff4bc26a38174eafb39cb562ee6e70041d056. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEF059802466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc5021a0598e46a2fcc1dbe4c6c6afe915cc18329c6086b272095314b3c415e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059802467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7ffb31b4a11dfed618664598dec0d9cb7c061a7bcbbdfaa9c324b0f181b20e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEF059802471.