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 0x7baf80143abf9fe3173ba251b464501a427601285524cf53070ff043ef1cd335. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/265a2034-06b7-41d2-826a-da6e2da17308.json and https://artists.proofprofile.net/proofs/artist/265a2034-06b7-41d2-826a-da6e2da17308.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xe602ae2c10b5f18b09a659350de7a106541f60f23b644d02a7d44c3c15319055. 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/USUW61050025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fdb5e73b2b6afd5fbd132a0ec06ff2182dcde3cea30add2f54ce0395a46e19. 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/USUW61050026.
L'enfance du Christ, Op. 25: The Shepherds' Farewell (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d2d562ba3da925dbffe6cf3c29b39594087ec4e3d58d18bc9605682b0e9e0f. 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/USUW61050027.
Il est ne le divin enfant (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759054c9cf12ef7e6a69ed345892ef8c00b0274b6112e6e4277363a4bd4eb609. 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/USUW61050028.
In the Bleak Midwinter (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53073f54823e46bad0688fe5cb0f8af2bc975a348221e643916bfbb5d04fb3a4. 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/USUW61050029.
Was mir behagt, ist nur die muntre Jagd!, BWV 208, "Hunt Cantata" (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5800fe6726799c501fc1a18baa6337a6f97a10fa24f20b34fc4da523df007840. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USUW61050030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18397c71e82aa6069d76553ce2cde1e44752ee3b2b117bf14230f4084219b1f6. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USUW61050031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a29d4788747f3b70b599c6c35f5e207b445e98d5f5b43656bea7ec0dc30655. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USUW61050032.
Once in Royal David's City (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c671448bc8407fb8d0e26718bb0e8aa8f277764bbef4295c0e2f0073f136266. 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/USUW61050033.
Ding Dong Merrily on High (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dbbcf1c57fc951542d1b88d5e5b64b49934e37ddc6878cc5a56242a18dc3e8. 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/USUW61050034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ad029301ad1337df4fafe1f657d9ba9ade9fa9f9eff95a84e9370ec637446c. 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/USUW61050035.
Ellens Gesang III (Ave Maria!), Op. 56, No. 6, D. 839, "Hymne an die Jungfrau" (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc278afbdff2265c4f48f4bde19c9c63a953265da2e7f88540f5193c3eddfee9b. 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/USUW61050036.
Herz und Mund und Tat und Leben, BWV 147 (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b92575d339bc485f554e80fca87d1244f4b3e475a2c05f8b77822ac59d490b. 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/USUW61050037.
The Eastern Star so Bright and Clear (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20697b6847354877e9fb19b13fd745779a206a47df08bb837a510523534f9cb5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USUW61050038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1608876502e8ba41aef675bac8f680495d3387d9c137e5f3b23d8d8fd63235ea. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USUW61050039.
Innsbruck, ich muss dich lassen (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc1c630363d2fa3ba711fbf35ff2e2ccb23edcc9f931ee8160d4456a390bfa4. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USUW61050040.
He Shall Feed His Flock (arr. A. Delmoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780d06989a8f02fc0bd8c72ca3d079c0fb2905e8e693a9cab8b1941adc2472c9. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USUW61050041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91602dd4cdd5d487f6965fadb8e541a9bb313e2d535d0ab3f845144e984652a2. 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/USUW61050042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32bfb885b170b5d500766af144e0e1ad298e5c9a6beafe9d6e84b25a88aa3b2. 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/USUW61050043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68369002ccdf092f2b7705723ba0cb41f967f9186216fe85f72ca9cf27f1e9f6. 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/USUW61050044.