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 0xceab48b3b3b82c99c235396793dc05749b79ada1b3d1dd975aafcf8af338fe58. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb5574e7-2fc8-4ba7-827b-d97f5d1ab075.json and https://artists.proofprofile.net/proofs/artist/eb5574e7-2fc8-4ba7-827b-d97f5d1ab075.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O du fröhliche - O du selige / Weihnachten in Wien
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 0x8ef42646af9da37d58651cdfcdd6c88640c67dbe66cddd491a02427d28958787. 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/NLA508809410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c013b19a169b4ab8dfd65869c88c4fd2aad1707dc94249a644e41b8696d4f4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBF077941204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb73aed2173c3b2a043f660525ed5986dfdc4619291d5a5aed5cb57256ca5b07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA507928411.
Eine kleine Weihnachtsmusik (Eloquence Junior)
Ich steh an deiner Krippen hier, BWV 469
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ac07c4884490bbd7b7b0353a03d0697adfb327f6986c78c8cd6807e233a06a. 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/DEF079304500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fee86f1c8b094bd842aca5626c88e7517c0aeb0bd304dab50ad121a8425d243. 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/NLA508211401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ea35ca42b369f010d9245f502528f76f8b9d2433d8ada12083e44be05fa494. 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/NLA508211402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f972851411b8c97682770a6c8f125ec4a18ceb98c34145d0bd8208bdcf6bf8. 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/NLA508211412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e31e0ef1c5107bc13d34abf11edb23a480a690396fd72901f1235861664ccb. 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/NLA508211501.
Herz und Mund und Tat und Leben, Cantata BWV 147: 10. Choral: "Jesus bleibet meine Freude"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b7234d562a709989459da01f50d814b6f3cdee446cb61006bf7e1fe70e2924. 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/NLA508305710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf832121bfd77a81e359fe3f66212f11cda0fc4b3361765eee3c60219bdece30a. 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/NLA508809504.
Hear My Prayer, Hymn for Soprano, Chorus and Organ - Sung in German
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88227f547055b867cb3b6c90020e5cf59e57e284f67553cdfc7cf1d48a740a25. 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/NLA509010408.
Messiah / Part 2: 42. Chorus: "Hallelujah"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde117f88ed16e4fcaa5f53a927742ef63d6101f02e949399b990d43ff1d16afd. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/NLA508305701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4129ad296d781aac2c1fc6823b45820aeab35998708c0e44c04e5f817d1b67c1. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/NLA509010406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf66a0b42137971e33ed6a7e21213af358d12cb9f5a6ee74f3c67141dacf284. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/NLA508809510.
Samson, HWV 57 / Act 3: "Let the bright Seraphim"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c571d37face94000d4d0f7e1b3ebffd6480ef704b2d85b16a3f9e9cbe8e5f7. 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/NLA508809501.
Rinaldo, HWV 7a / Act 2: "Lascia ch'io pianga"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f20fba75c54a4566680281841198efb145a364012fd6be50c6f122f7506a88. 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/NLA508809502.
Zadok The Priest (Coronation Anthem No. 1, HWV 258)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c7a8bb9fd086466e2c84651fccef12159c946297f9fdc3101e505d8ea7a8a4. 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/NLA509200304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594b117d4e90e70dc463d283b4a6ab8bef11834b2670522c64059cf863f6fd9b. 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/NLA508809509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20356e46c656be0e2144e4d811c3588916cbbe2f12cc53f5b2db5f3f9ccae01d. 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/NLA509202705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6b0b163675f918fb261e2653a9bf4aadc65a6d5aef328f6e02d6fb3f6d28c7. 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/NLA509202706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252ebd7ec61073567f46c6efc9bc764c4b4167d77e99f7a689e3d27971ff5f69. 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/NLA509202707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c9347f99b2367a1be66245c8f86116f08f998639973d88c1ae98dffd3aba4a. 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/NLA509202708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8924e304ad27249dd157b2d517f2a7e31574d4c13aa004ad7c6477fca48bed5a. 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/NLA509202712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ebe4469da1e60ce39bd99e4dcbb442a7dea2e51660ac2a3d3aae6778724215. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLA509202721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5bfb7c41a917ff46b6ebc77e6aa88b7c34038eba5ca489ee8aaab2b2e7b68b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA509202724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb0f9eb8b8c05339248244f968d5e1e1e9b979e85ad17037f4417128da52df1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLA508120907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b6221adeaa75ec838658885d1a0c534c0f451887e856c66aa00dbd2d86fd6b. 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/NLA508120920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b27035618e147099f2af1567484640bb18fa1167b965aabfab8c0622b78caee. 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/QMSMN1131819.
Mozart: Missa Solemnis, A. Salieri: Te Deum
Bach Family: Chamber Music for Two Flutes