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 0x6fa3193565e1955260a2747c8306d0e277f5a1049523ce2b523b9c1ecc69b0e7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf751ad2-a398-4c44-a541-3ee786aba813.json and https://artists.proofprofile.net/proofs/artist/bf751ad2-a398-4c44-a541-3ee786aba813.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Symphony No. 49 in F Minor, Hob. I:49 'La Passione': II. Allegro di molto
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 0xa208f4503f6107f55a562f7609ad23e78a910849620aca8034aca664bd4d98cc. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR50X2179001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3fcb540164dce29f61d27d759fbea24f048ee8b7952ff15c35b8a9a2ff6fe0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR50X2179002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8b0a714be4693db86f6589fa31dcd3d9db71d40fd178dee07665a3c2e4d262. 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/FR50X2179003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a4dc4ae0ae629958af55ef42c4353f21547fbd3ae3da85aef2f160e8f8ad06. 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/FR50X2179009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049f478b845227a3165c6bf24fe5306332be45e2691f0af329bd9f35c64708c4. 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/FR50X2179010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb9c6a276dd0ed23325c767786fa31c1c3c530134503ab33909fdba4884f2ad. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR50X2179011.
Salut d'amour, Op. 12 (Arr. for Orchestra by Leo Artok)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33397e59b5fc04783c00cae8f779707a9212013ab3375d1dbcea2f49e4246be. 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/FR50X2179012.
Symphony No. 49 in F Minor, Hob. I:49 'La Passione': I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0d236ecb4b4f498c9fff5c667e192abf685e975dbae158e7b00f855c8e16f9. 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/FR50X1958602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4e0675838e302c5b35eb96c4b1da6758f6ed9505cfbe4a796411dd08b177b4. 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/FR50X1958603.
Symphony No. 49 in F Minor, Hob. I:49 'La Passione': III. Minuet - Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b72c77e098ba7fe8e8394a3c214af7f232c66c0466d215da2947a0da258ce23. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FR50X1958604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ce0c5ffd6c64f98f3990f991bcc43d9d93409c0593d653ab7f318afa8385e6. 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/FR50X2179004.
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 0x08c28e8371b1a0f845ee0d94783b824f0769cedaaa0e782a1a50b37f55114ab6. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR50X2179005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd91afc680e9ec388541d8f7c573c7c35cb81dec328626966cc155af6957def7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR50X2179006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d323ae00c064aa1e50445e4ed011048b9a29c67a493b4e730e0509c646b33d. 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/FR50X2179007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7431964d2f51a3c7c96dc72c8ce96b784abab9cf6b718a18d9c0e8dd6bb1af. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR50X2179008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db50676ad7cadc67a603171994c8787eb35fd6f9585d4b59d7a87a2c48229df. 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/FR50X1958601.
Symphony No. 49 in F Minor, Hob. I: IV. Finale. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992abc731cd6bb8dd1e45b934eaf0ad614e5681623e3868564781ac733d24b40. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR50X1958605.
Quatre chants pour franchir le seuil for Soprano & Ensemble: Prélude - I. La mort de l'ange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cfe345c98159614d8093db63391825286a0eac3c496aff2fd178e6eb038860. 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/FR50X1958606.