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 0x876d8dbc96a68b7ca8984e1422b302a0fc400d08fddd6acadb53e2c56960fa5f. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a032eb15-cef6-4672-90c2-01e8a06fbc2b.json and https://artists.proofprofile.net/proofs/artist/a032eb15-cef6-4672-90c2-01e8a06fbc2b.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 0xf6c03abc73f990f1b4f14b80e9593a8d5a03e3fa4417c3e343175e8123a99f93. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMQME2000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80528f1efb9f92bb13d4d33860ae49e37565342cbc0dec8446b805770e3d9d31. 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/QMQME2000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd7b9827a47fe46a21d54e8d9d486c0060e05663f50fc39812440c902275fda. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMQME2000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923ee81bf9274d75e3b0ba81a6333f07fac8e4b2e306093c82835988b54b3699. 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/QMQME2000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eead34eef89804fb1c029973aef2c406fec8fee713eae972a2b341951a16270. 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/QMQME2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03e292895a0b235e3d5466d3f562ec89b59631407a4cb96c83d9c9c374744cb. 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/QMQME2000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d5b55f0e7f55c74cc70c4a35cd5393341555198716059bee55a96f7cf2bcbb. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USLF51602013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd70bb8e916fbb48e578b7c85ee8055468b5ab1dec721351cc40c1152fc6aad4. 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/USLF51602014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866d01a4eee653c852c42e8a5da92a8b1f881136c626f86c283912a0f8851acd. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USLF51602015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152101c9f41034b08760e3e39054d30dad4819b60048ebb4d9d2c2036f4b0b41. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USLF51602016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d51ee190edd041ed9d382a2c588a4fb2f0b987e55ce84f159ec14cdb1aeb9f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USLF51602017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159e181bfa98a5c692163defc17535544445c4829b8e7871e1b88f199e749b3f. 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/USLF51602018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb03592b980864541a6f871d8a31d09b6785aa58b0422d5432f923dffc5dc12. 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/USLF51602019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0d9c8e1f724469eb80bc48e3f6c1a225d20eacc2243c7a108346add4dd5831. 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/USLF51602020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfd976a6ea6b8f68454671b9d51bb885168c4045b890fa7f03c755ac7c3b74c. 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/USLF51602021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d67bd724232da05ffb60f0743aef8dc1b9c34fb2fdec185e717ee367c19bb51. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USLF51602022.
O God, Our Help in Ages Past (St. Anne) with Abblasen Attributed to Gottfried Reiche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3ce2ad299cd9dcff5f08d019159b99b3aad8bde190c36b7574d27fe70a208a. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USLF31501840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1773a00b5e53c7b46b3cc86b2526a735eda7126e64a1f4af441e6c97c101b4c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USLF31501841.
Praise the Lord! Ye Heavens, Adore Him (Austrian Hymn) with Haydn's Trumpet Concerto in E Flat Major, Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29a743f72e0bf16d7c8cc994ddf1d5f6f9d1bdfaf8f8dece3177a0c677eb9de. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USLF31501842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d4a06fa9db3ead2b9e6936fd6715b1a72433cc1044d029ba6a0d289daa89fd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USLF31501843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e37e467d392edabd637969ead965d0a0dd9919a061f45d7c85f7f7f65f24f1. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USLF31501844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbf45cfa448fdd70c6e5f2dc49881ac3a346f1039a4a80c6544f133433e9333. 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/USLF31501845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0659bdb3866d471bb91a0e4dc902f0d4e4be7998ae604896510f65f8089cdb9e. 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/USLF31501846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712ebdb83d9a8dbd5765332f59f32a67044e8d123ea734e138a318d728f94125. 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/USLF31501847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ac72426659e366eef22a0fb2a554325162c7a79783f2fb89f7269a1b2caf94. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USLF31501848.
Grace Will Lead Me Home / Amazing Grace Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91a99caad31e277e85cadac745dced13cf22b383b9c0924454d9516f3059d2c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USLF31501849.
Easter Prelude (Christ the Lord Is Risen Today)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3621975648c4bd86f289054d2d3ef213aedc82c4c24fe2a7bf48af914ac38fd3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USLF21501830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1805b5106437f36304706cd41c5645d9850a431f9e2cb1697176deee74169d42. 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/USLF21501831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa880eb3da7046abaa6db5f82e787c14be311e2c4f23bc9e83dc04acd4a815d1. 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/USLF21501832.
The Old Rugged Cross / Beneath the Cross of Jesus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1b9d6fdd3296c54b22fecf79b62223af970d4485c00dd59a080ef9b7b4468c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USLF21501833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe757b5903089edfee288110202102a3274896370732430e2f7a08b60494785. 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/USLF21501834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b2ab1a7aaa1a1df548f6dd9c016307452b2ae542cac44950a9501d17923286. 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/USLF21501835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792cbade675179d24e23912b43a6e9af7cfab0f9a2dde45ce73b9b2bf2f6a4ec. 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/USLF21501836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e9240c16d83ec03ef4a040082d3b374fd1563082c9ccad2dfa60ff0f8cd7b1. 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/USLF21501837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b93f00e25edde44b9c67dfca0e922b1b033ca11e00e7e2ca8d4646f3b7e9ea6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USLF21501838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359678aab7bff6f7d202c3e54269ea1e5ea77f8266354c7d3385243008a9f647. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USLF21501839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef658bcb5b57d511193808cdcc45ae19b8ca93d930500f15ccc0b312d34e840. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/USLF50801491.
Come, Thou Long-Expected Jesus / In Christ Alone (My Hope Is Found)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a244d24f8dae3ba3e26ee2245822a29eba7c113e212e671d60a41c1101b1e7. 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/USLF50801494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91e7b4a2d323c832f00688f45c624fd6ebe88289cb4ecc90789c450c7eb45cd. 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/USLF50801495.