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 0x56b0e5ad4dbac6a0ff40e09369624740555624b67f207e16c87c188b2151c7c9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9389bce3-c52c-46d7-8a84-32d67f047b46.json and https://artists.proofprofile.net/proofs/artist/9389bce3-c52c-46d7-8a84-32d67f047b46.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c489b204eea58ffe200c44bf798173317cea6507657de4f388d19b900a9d22. 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/GBC7N1042401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81becba7d3c7a3b362dce3a4683022804d64a9675a0be1127a78d14105c14c. 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/GBC7N1042403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a733b8149238a08183b86240e0370cfd45b44f327a15b4a9b8c2c501788151. 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/GBC7N1042404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc099c4698920ddc3e220ecc94f59ae133082defeb34b40014d995d3626d26724. 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/GBC7N1042406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ecbdfb612f209c4ebc9976915e5428e4bff13a627896897b4eb05136944326. 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/GBC7N1042409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a524417553c2b71fa2fe6eefb0313b80a753320282b3ab2b78400b1da28fa6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBC7N1042411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367ec0e6bebfbe1e673a84f546e17ec7615490829d3a62702a744d8a5a77055a. 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/GBC7N1042412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d10efcbe5d7d701b17c8caac54499b9702431c82c99018178fc1b1dc50d9d93. 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/GBC7N1042413.
Battle Hymn of the Republic "Mine eyes have seen the glory"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5020e9d9fd4fdf959c86485bca440c77df4a231a1451ad527e69d25535f3c4c7. 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/GBC7N1042415.
Wills: Te Deum Laudamus & Missa Brevis & Ave Verum Corpus & Caedmon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5b1295b75a2a9c0160590cb0e25cd2bfa9781486ae4dd3c4f4ff65f0293437. 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/GBCRS0112606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7853c0277bf3d8cb529220dbc6a41f346f11f9dee6525e0fd929aac65e89b487. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:57:45Z), 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/GBCRS0112601.
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 0x856db380722003c0c96cf1382973a5ab236812c06b2caf52930b0211ae3bf6f1. 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/GBXUX0859201.
Evening Service in G Major: II. Nunc dimittis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25214ffe9443b34368847f1eef6eb95f4a5bfb01778546f62718dce808964741. 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/GBXUX0859220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d13917a4450d83b25c5bcef4c4865c1782145df7107d147a91961acdbd405c. 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/GBXUX0859202.
Choral Music by Villiers Stanford, Noble, Jackson, Bairstow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db7df5cbe8993d60e57eadf85295adabbaa395715e3e6451b1ed3388f3c197. 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/CH6639671705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf056458ad62107eb781735c5b3f5f597e0120e53299c3b041ddebff04886fe5. 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/CH6639671706.
Psalms of David, Vol. 8: Praise the Lord O My Soul
Communion Service in E Major "Collegium Regale": I. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afcb44ed7bff71af939cc1ecbb5719391f8501d67d1560ece644f13a3d308a4. 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/GBXUX0827002.
Communion Service in E Major "Collegium Regale": IV. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffc984b25e57a4e89b2e96fdbd531d506b5b98eb9619f4c47deb4a71d36b885. 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/GBXUX0827005.
Communion Service in E Major "Collegium Regale": III. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11c44d891f3eeba98afb35c6a9e27fcdee79bfc5db7a25d0a34b55a31368e75. 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/GBXUX0827004.
Communion Service in E Major "Collegium Regale": V. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e625424c0a25a2cd119c0b7d92b4ad8f9b232a16b18da99b0d9e736ab60b8c. 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/GBXUX0827006.
Communion Service in E Major "Collegium Regale": VI. Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af449928e45f42e483b78f05437bb6d1ca418bfcd4e11609dfe671c878fe373. 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/GBXUX0827007.
O Taste and See How Gracious the Lord Is
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f7e4255b4d52be3d37b26b2e7bf9766f25d13efdb4b8b22d06da37b10944ac. 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/GBXUX0827009.