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 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
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)
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 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/NLA508211402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f972851411b8c97682770a6c8f125ec4a18ceb98c34145d0bd8208bdcf6bf8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLA508211412.
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 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/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 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/NLA509010408.
Messiah / Part 2: 42. Chorus: "Hallelujah"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde117f88ed16e4fcaa5f53a927742ef63d6101f02e949399b990d43ff1d16afd. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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 0x7fee86f1c8b094bd842aca5626c88e7517c0aeb0bd304dab50ad121a8425d243. 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/NLA508211401.
Rinaldo, HWV 7a / Act 2: "Lascia ch'io pianga"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f20fba75c54a4566680281841198efb145a364012fd6be50c6f122f7506a88. 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/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 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/NLA509200304.
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 0x90c9347f99b2367a1be66245c8f86116f08f998639973d88c1ae98dffd3aba4a. 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/NLA509202708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8924e304ad27249dd157b2d517f2a7e31574d4c13aa004ad7c6477fca48bed5a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLA509202712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b6221adeaa75ec838658885d1a0c534c0f451887e856c66aa00dbd2d86fd6b. 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/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