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 0x3bb0a46fd4c26b7cb9fcc4b660cbc10e1d76d86c14c8f66af2547a72780cf134. 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/f94ab0d0-87d2-4edc-a41f-38ef9582146b.json and https://artists.proofprofile.net/proofs/artist/f94ab0d0-87d2-4edc-a41f-38ef9582146b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anne Boleyn's Songbook: Music & Passions of a Tudor Queen
Missa plurium modulorum: Jouyssance vous donneray: Jouyssance vous donneray
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 0x2879f3cc31e15a0fd8593932be23249534a6461313e48d3e0fe7362f871b768b. 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/GBCJG1402112.
Improperia, "Popule meus, quid feci tibi?" [Anne Boleyn Songbook: Royal College of Music, MS 1070]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3828925e8ad0313e292c05b5fe6eaaf413750c1d3ca27beb50422809c0b07821. 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/GBCJG1402113.
Fer pietatis opem miseris mater [Anne Boleyn Songbook: Royal College of Music, MS 1070]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ff6020a4418661c8c7303408a3a910e0f8c236c4eb92e755163a0faa4a4bfa. 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/GBCJG1402101.
In illo tempore: Accesserunt ad Jesum (arr. D. Skinner for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5df449369bcbebd1f7f5c6ece4105669ca6aa6bc301de2f6271a0689be8793. 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/GBCJG1402114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380fe1ec5b6df8f6d3b87275731f205a09eedddd39890eae6d6624b0d6809404. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBCJG1402102.
Maria Magdalena et altera Maria [Anne Boleyn Songbook: Royal College of Music, MS 1070]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fafcc2e5c0cba8d050b86c7eb1ba0151f6c99ae7ad97ddd2b7e859d972f4eb. 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/GBCJG1402104.
O virgo virginum [Anne Boleyn Songbook: Royal College of Music, MS 1070]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe5d8dae1877295df0c4bba0f14736d483b70b74d80215bfed12fd5d3f3429c. 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/GBCJG1402106.
Paranimphus salutat virginem (arr. D. Skinner for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804a69dffb52f30e2692e143de470cf89b10a94d1835a5fc93ee9451bddc7a0e. 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/GBCJG1402107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bca77dfb8ff12968040417996da23fb0582586a77fdd67f23c1a02af2a1ba23. 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/GBCJG1402099.
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
Sicut lilium inter spinas (arr. D. Skinner for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31520f99e8ee905ed09802faefac2803be8daa31f95de3f11a968ed359f41cd. 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/GBCJG1402115.
Laudate Dominum omnes gentes [Anne Boleyn Songbook: Royal College of Music, MS 1070] (arr. D. Skinner for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628bf57e5d135788dcd0946b6058e02e59d2b3dbb0c0daa7bf8b179f53fdce79. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBCJG1402103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4c4840719d381d3cca58a1d8dbc74a3028714e255843995323cf4eb4cd361d. 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/GBCJG1402116.
Forte si dulci Stigium boantem [Anne Boleyn Songbook: Royal College of Music, MS 1070]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9387323b69c9a22bc3658b4927ed262c759fc5ffa33fee3b1018834ce4e32fdd. 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/GBCJG1402105.
Tempus meum est (arr. D. Skinner for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35accf4e9ee72f901374367705d5fb91c2abf67e742280dce2a44f7b3cb302e3. 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/GBCJG1402109.
Quae est ista (arr. D. Skinner for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad61b3bc908261e113d3b88bce4bdfb3460e8d97857736ba65223ed2455a7fd. 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/GBCJG1402110.
Liber generationis Jesu Christi (arr. D. Skinner for choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f83fee1f665af8e3548b5fe9c6b2477a5febdbe7ff496978e0a71dc29007f14. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBCJG1402111.