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 0xf37420b0359e0d9a01adc40e8b062dd7d7e5c50b9036b66d136bf0d29a73e170. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be117c35-bdce-4921-b9b7-89309a27b3bb.json and https://artists.proofprofile.net/proofs/artist/be117c35-bdce-4921-b9b7-89309a27b3bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Miserere: Works by Gregorio Allegri, Leonardo Leo, Giovanni Moro da Viadana & Francesco Scarlatti
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 0x67500f25f063ec7379f9d046d94423780d058feb5e9e727c1ba095f7ab1a5ab3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ130100651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b43fd2dcd684db9745a74a6b2255e7e584d866ebe6c9c673101835bb79058de. 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/FRZ130100652.
Miserere a 5: No. 3, Ecce enim in iniquitatiibus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8264ea075217c2e905f275e82dd292a6546d306c93e14c4363c16699869f73f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRZ130100653.
Miserere a 5: No. 4, Aseperges me hyssopo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59247275783ba5dfbcea293d9509e8c7a22eedc258881d5354c7ec8a80f82dd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRZ130100654.
Miserere a 5: No. 5, Cor mundum crea in me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd824c0930647a481910aedf91de320d1b676db82826345472e358c728af32e6. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRZ130100655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0780b5aba3d7ecd712185c140874c202afa3b33a61c558bd553a172e085f38e. 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/FRZ130100656.
Miserere a 5: No. 7, Redde mihi laetitiam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27e71bd69ab876bd69a3ebe5cd8adcb665cd7e01ea59514ffd3f7672f129d80. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRZ130100657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a08411cb8f97ee115d5799299dd2c13ec77cfeb99bb415c0f04b1e5d791861. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRZ130100658.
Miserere a 5: No. 9, Benigne fac, Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b413247720ce6b54271627b6b01ce8851532e71cac5a6e40f430eea205cc57. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ130100659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d6bb7516a67e6839801493345fa0e93d52e3b6ebb657ee81a1445c6f23799. 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/FRZ130100661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744f2c1dbdebffde1b5e9d60ddefb05a1d0c814ac77d5de0a771ddaf0b0f8d2e. 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/FRZ130100662.