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 0x71c54181e6b28b9fb82785985952faa1f32f1e8be53ead8037bc4c014bea215e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2a243bf-d01c-4eff-9880-022575e88ba7.json and https://artists.proofprofile.net/proofs/artist/b2a243bf-d01c-4eff-9880-022575e88ba7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nocturne: Rachmaninov Vespers & Byzantine Hymns
Vespro della Beata Vergine, SV 206: Faux-bourdon Domine ad adjuvandum me
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 0xe07ddbaa3341e63d2b0454a77a42df836dcfb328df17aeacc08111ecc92732cd. 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/FR50X1855201.
Vespro della Beata Vergine, SV 206: Toccata et Domine ad adjuvandum me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24ee63a3f9143fe113da6759b0f9b54094b4857d4c99a45ff483b4467ed7b0e. 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/FR50X1855202.
Vespro della Beata Vergine, SV 206: Antienne Gaudeamus omnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25beeb7db27913b69ef0bdf50d4752c1dbb547662b5d7ac17da696f3d6826183. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FR50X1855203.
Vespro della Beata Vergine, SV 206: Dixit Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa5c30f9fee1a807fd8eadc8432c3ca27f5efb7b7a2bb50247150213e0a5405. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR50X1855205.
Vespro della Beata Vergine, SV 206: Laudate pueri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee5527006b453347c40d1d28a4a81a6e277d3708b0ef5785183ed09bdd0526d. 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/FR50X1855209.
Vespro della Beata Vergine, SV 206: Pulchra es
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4381869b41aa874ac89f25b72d8d85b03188b3e8a5fc7c0ff70dd59b0f2033b9. 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/FR50X1855210.
Vespro della Beata Vergine, SV 206: Laetatus sum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c4cc895f812da7cdb3b2ec3c4febaf382e54963584dd881537660a59df02cf. 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/FR50X1855213.
Vespro della Beata Vergine, SV 206: Faux-bourdon Nisi Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc614bfc32d6bf2d8ac1339429f92c0644d40c44d0ef6449f3073df952e61394d. 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/FR50X1855216.
Vespro della Beata Vergine, SV 206: Nisi Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9d31b8ee6ee3d2b7b26f7bd9a57dd1287fbcf134c099af678cbdfc36f1a8bd. 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/FR50X1855217.
Vespro della Beata Vergine, SV 206: Faux-bourdon Dixit Dominus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbbf12f47e12a4a5472052c4aeffd510232713e9b31cc98bb2dab2bdf8d0179. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR50X1855204.
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
Vespro della Beata Vergine, SV 206: Nigra sum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130975de06bc053c9d9978873cf644e99be8deff8ed0dd4cc738800caf6f1555. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR50X1855206.
Vespro della Beata Vergine, SV 206: Antienne Diffusa est gratia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbe5e577a6e84f324bada5e417f77845db22fdae3258068babb367217c9ad4e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR50X1855207.
Vespro della Beata Vergine, SV 206: Faux-bourdon Laudate pueri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4416b0d0badf120019328e04d7da790ca67ffe2fe71cd108878968ee55916d0c. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR50X1855208.
Vespro della Beata Vergine, SV 206: Antienne Tota pulchra es
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe745811042ed2a1bf312475e64644e87ef40ffb6d2375f8cd426fae260d4d17. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FR50X1855211.
Vespro della Beata Vergine, SV 206: Faux-bourdon Laetatus sum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c80845be7527ae984afeea86680ab00f07b8bfaa160132877f4d928247fd6a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR50X1855212.
Vespro della Beata Vergine, SV 206: Duo Seraphim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c8bf8c4cce961ce7b6acdeafa6d65eef61870c4e9f8afbbed2c7a7ba2de16f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR50X1855214.
Vespro della Beata Vergine, SV 206: Antienne Recordare Virgo Mater
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12988400f84167376797d01bd48a8b22b6d93e6a49c7c76e2f515242bdd07c6. 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/FR50X1855215.
Vespro della Beata Vergine, SV 206: Ricercar sopra Sancta Maria (Frescobaldi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe67e85fa30a4286c4ef9ce8ab0bf9bed15ff84457fa44eaeafbf78b335aee0e. 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/FR50X1855218.
Vespro della Beata Vergine, SV 206: Audi caelum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5dc8a8c6cca1835bf10d0f8ae1d22219336a596097288feee8b50cb1c46fbe. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR50X1855219.
Vespro della Beata Vergine, SV 206: Antienne Felix es sacra Virgo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67835890d14b10ec05a5f29495edde892a1154e3dc2c8b763180494a7be0a82. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FR50X1855220.