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 0xe9de86850c3fab86eef274653f41d9868b3ca9dd13705723eec9191a1f113ca9. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f464b573-3fac-4a29-b987-76f27f1ccaef.json and https://artists.proofprofile.net/proofs/artist/f464b573-3fac-4a29-b987-76f27f1ccaef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tous en cœur (100 artistes s'enggagent en musique pour l'enfance en danger - Live)
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 0x9f36052cf209d1a8871be11f4d1324ceb6f06e89959f405566cafdc0630ef027. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR7Y71300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597ffc6ac0eb0c2600c1e2cbe86f8b7e7570c12534076540fd7c73bb71f3951b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR7Y71300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada381bf96c4190e2a35679adaaac1b90144f286ccabe6e22898a092c3b0be2. 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/FR7Y71300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79563bc524a709427d1b163d436bf42a5332369ce7fc816155f6360879a41192. 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/FR7Y71300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9084df76de76888cf8ff4559d1a79776b3c66fc51ba348bfc07de374913bb9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:47:08Z), 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/FR7Y71300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6461652c1df84c3bde59e4999eb78cdf196a71062aeba2a5e122a8745adcaddb. 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/FR7Y71300014.
Schwanengesang, D. 957: IV. Ständchen "Leise flehen meine Lieder"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7013a28c1987d6918b69f5c06f5d22d6c13f2e7aaa07cee8184a8ef0e5e84023. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR50X1941801.
Winterreise, D. 911 Op. 89: I. Gute Nacht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88137da4838cad258beec8d8877c8b4ab0c1bc5afa594a46355cfd415fd4ce07. 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/FR50X1941802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870bb530d4e9472aeec7ba3227c36cdca9ecf10426ebb614f23aaa972dd85a50. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:21:31Z), 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/FR50X1941808.
Improvisation on Symphony No.8 in B Minor, D. 759 "Unfinished"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd74928585ed76a195cfc9fb4c4c39739e6fbebfa0b1b01dd6a9b44bb66ed35. 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/FR50X1941811.
Moment Musical in F Minor, D. 780 Op. 94 No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf065590b56b3c54e91b7f24a086644aac7268371167cf6f7d9365c2ce76ef1e. 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/FR50X1941814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1ef6d1c419cf21e5e12e338788abc26a1e9c81fc75bc68b69732d2bdba4c30. 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/FROV61410602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28f5f6dea8a9ca68cbd72fc0407abfdaa31619b63b0a22270d830c2508339a2. 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/FROV61410615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed0c08b68b4c23ef2209429a78404c958f4a55bc4ba3fa76299afe13216def3. 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/FRZ131231011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f96d5e1f1ab7e473320724d37a8f156e00f9064d9cd7fe8b24ed92fca21724c. 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/FRZ131231041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3eba4e144c8af1ac7c8f0dd4c0767288c8fbfe8d6e05e0d210b77e643155b3. 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/FRZ131231081.
Fauré: La Bonne Chanson, Op. 61 & Quatuor avec piano, Op. 15
Choral pour orgue « Ich ruf zu dir, Herr Jesu Christ » BWV 639
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d047fcc2504efc041d83a700f9d3fd0ca4e65a0ba3b14993d2cd2a1d2cebe1d. 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/FR3Z51100167.
L’Offrande musicale: Ricercare à 6 BWV 1079
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8a14ffd71a3ce03b0c169b5407b627dde15d41a513f7129fbad870e81c7180. 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/FR3Z51100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e88e7b07804aa90bf09c880efe0b2ad8789e3918f95c210bf545749b6c0415a. 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/FR1P70801560.
Tu vuò fà l'americano (Arr. for Voice & Chamber Ensemble by Johan Farjot)
Schindler's List Theme (Arr. for Viola and Cello by Johan Farjot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e072e1aee037d1e4e56c1930ea89b45fedc1fa6917d420aab9b7971ad23394. 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/FR50X2076303.
Schwanengesang, D. 957: IV. Ständchen 'Leise flehen meine Lieder'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7013a28c1987d6918b69f5c06f5d22d6c13f2e7aaa07cee8184a8ef0e5e84023. 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/FR50X1941801.
Onslow: Sextet No. 1 - Septet in B-Flat Major - Nonet in A major, Op. 77 - Wind Quintet in F major, Op. 81