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 0x49f5dc9a8b7dbcf637610146996e66d50e0e6271b2c9496b6281bfd17d8051b9. Chain 2 (Bitcoin): anchored in block 953678 (2026-06-14T19:23:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63a0b736-bd2b-45ec-9f3b-dd1445273255.json and https://artists.proofprofile.net/proofs/artist/63a0b736-bd2b-45ec-9f3b-dd1445273255.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004acb7bac5579d1210067bf78a83577ce34b5ac7d6415ec303faf92b408723c. 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/FR50X2178701.
Philippe Hersant: Musique à un, deux ou trois
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.
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 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.
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.
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.
Chill with Brahms (Enjoy the coolest melodies of Johannes Brahms)
6 Duos, Op. 63: No. 2, Abschiedslied der Zugvögel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f9c61474daf6387a8efbd7e6c537e31746dccc9d3dcc65495fdafdbd6a3871. 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/FR00W1900194.
Concerto pour clarinette, alto et orchestre, Op. 88: II. Allegro moderato
Orchestra Philharmonique de Liège Wallonie Bruxelles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96420f99a829cd9febf79b67013bb2070927d3ca20837f3d24d5d5ebf0cd6e2. 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/BEE640971102.
Romance pour alto et orchestre, Op. 85: Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00825103f46096a4fbb8abb8ff1afeedd323f8b50b79d7a513f570df114b841. 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/BEE640971104.
Huit pièces pour clarinette, alto et piano, Op. 83
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338b9660c90c0d689b05f2a72025432745e8b9fee163af8f0baf0fbdde95589. 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/BEE640971109.
Arnaud Thorette . Brahms . Sonates et Trios
Auf dem Strom (Transcr. for voice, viola and piano by Johan Farjot)
Auf dem Strom, D943 - Transcr. for voice, viola and piano by Johan Farjot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d9582d94841e905e50163db15517050e6392427a2136766a0535c5acd1e4d4. 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/FR00W2000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004acb7bac5579d1210067bf78a83577ce34b5ac7d6415ec303faf92b408723c. 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/FR50X2178701.