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 0x1feb01ec3f9e0a0ef717461e765d04a0887b59a3ee854b5d0735cddd97f0cc7a. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08c50d45-d08f-4815-9ae9-b40742d4d362.json and https://artists.proofprofile.net/proofs/artist/08c50d45-d08f-4815-9ae9-b40742d4d362.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 0xffe0d8a104299ac8358f08bcae64b026e83181e7264eff3d1549fb522628b8a0. 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/DEN962303270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd197069b67b8dbb920a9cda37a39e8585032db8c903259d89e06ef67df77814. 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/ES33S1500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e6f6d494a66d02ded0d530dd70034379ca7e52d28925c51f3cda936968d9e7. 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/ES5700400783.
Concertino Para Guitarra Y Orquesta En La Menor (Opus 72. II Romanza, Andante Molto Cantabile)
Orquesta Sinfonica de la Radio Television Espanola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb6abc0ad09d4a3c11704d4b3a76d928213818341846741442146604a4f7335. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ES5681403463.
Diego Araciel: Obras de Cámara para Cuerdas (El Patrimonio Musical Hispano 32)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c7ec81eaf56d6ad115d66342a63e294d9cdc58984b1fc33c750668845d1639. 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/USCGH0744703.
Siete canciones populares españolas - Arranged by José Maria Gallardo del Rey: V. Nana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77f53a75e3f274a88cc9d9c650e36f9563830bc3c00008dbe4b5fbc86ab31e2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEN961000550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77f53a75e3f274a88cc9d9c650e36f9563830bc3c00008dbe4b5fbc86ab31e2. 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/DEN961000550.
Canciones clásicas españolas - arranged by Juan Carlos Cuello: El vito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cbc91a2f9804aeca21a6afab6faea8c966401f899f1942f4d033be8af36540. 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/DEN961000630.
Mersedesa (Transcr. for Mezzosoprano, Guitar and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1decb7e1c65cc16fdc98d597ec21c1960c791cec3ac86f904f0c4d3a6f17e39. 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/DEN962303280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e6b353952bf5a4346e62ecabdb6bd79ada9a32ac10ceaee3d76d22e6988f9e. 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/DEN961900390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0d8e223981574d57a82d8b430f9cf3fbef890f1df7c5692260fe7d00afc399. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEN961000590.
Siete canciones populares españolas - arranged by José Maria Gallardo del Rey: IV. Jota
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dbe4f3d0b974d17ab923de127d01e9b6888f6682c029252d2509c85738dbb5. 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/DEN961000600.
Canción de cuna para dormir a un negrito (Transcr. for Mezzosoprano and Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1e59e218861c0ad71661ff77dbc4d72e15c4d1fee9921a9289f9905de43860. 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/DEN962303220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278043cde13701f1c4202340f877845625e05229c8b2a51fb445e2585528ce37. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEN962303260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac97ee5afd6cd0ebcb78d672fadec28be8a7a91cd0403cb58f149c542da9c57. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEN961900380.
Maria de Buenos Aires: Yo soy María (Arr. del Rey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2c3ebe50ed97cad0325fad4e6ecebf05c7319b5031629fe05d83d166ce193d. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DEN961900280.