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 0x1b4d41aaad95957252cc52cc995ec8231be7b9dec0157338e0433460e8bdd996. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f67fbe07-d575-4177-96bf-0442a8169eb4.json and https://artists.proofprofile.net/proofs/artist/f67fbe07-d575-4177-96bf-0442a8169eb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christian Hymns for Easter, Organ Accompaniments (The Church Organist Series)
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 0x10574403c56cdc3f520490286000712a2cfc7a5b1df2d1443f7919e07cb24b9f. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GBSMU2362352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c9d1ce6130be8e65130721198aa5defda6c9cdd4a9a5ecba15634dbfb35e7b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/GBSMU2362353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e71de2f3d9699a7f328e973779a2d48bf06db31f423c7675c94246be23fd35. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSMU2362357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16795c479ef31f971150fb46c38413d9ef54661cf85f9c1342ad28ef7f683262. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU2362402.
Christian Hymns for Pentecost, Organ Accompaniments (The Church Organist Series)
Christian Psalms, Vol. 1, Organ Accompaniments (The Church Organist Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc761f5658be652652f41ae434c63098e43fa23de7febd0122aa42cb17b672f0e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU2377463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaff66ef37f2da6543062aeb5baa0361d3c6fd4152eac3c49c0f6d7b14cc32e4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GBSMU2377464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc053a2879e8cc8c87926f7b894ea073d2100b040703501a98eb2f68d747625e8. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBSMU2377465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee1084041c4647e8a4433ff53dc4e48648c3b8cc3103a89d30a62619f9c5059. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBSMU2377466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf3c4caf71253f74b7dcd56321c97f16540b485c2859cc4b61b6a0f5e4f5bc9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBSMU2377468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a785cbda41c9edd96b0f9c2b8dd5ae14e5a4664bf77548981941dd6f89153d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBSMU2377471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33a757e9193ea7597cc3da7f8add2cec225f25f093208581fcc5ffed3d98a23. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBSMU2377473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffb8101f2e787bdf342ec44f07c91e4e7bc592cd5996c743c73f9042ef58355. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBSMU2377475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45500535518950d21e990eef03f594952ffcdaef9efca7e742fef75dd99dbbe. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBSMU2377545.
Christian Psalms, Vol. 2, Organ Accompaniments (The Church Organist Series)
Christian Hymns, Vol. 1, Organ Accompaniments (The Church Organist Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe607b0ea49fa957d2f9cf3f527b704aa820f764f72aebbf2c3ba357eeeb84747. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBSMU2407270.
Christian Hymns, Vol. 2, Organ Accompaniments (The Church Organist Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83dcb6a263f26bcba439e5b7093c54765c0ce6d70e9b591afdca649d5ddcf19d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBSMU2415998.
Christian Hymns, Vol. 3, Organ Accompaniments (The Church Organist Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e0382d5037d0d49a0d3c2ae005ba67529b17e3a247d6620fc51db87a8280a0. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBSMU2518765.
Christian Hymns, Vol. 4, Organ Accompaniments (The Church Organist Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85510414b83b4711f4c0f533fb66c9b2402e142c63aebc93e234bc9eaa8faf5f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBSMU2531813.