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 0xebf0012ed20ed6bd419f99aa0bd977bfcb5255e0fd1479dc449a63aec5143b52. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7945d5a-4e5f-4831-a065-5e69907190b2.json and https://artists.proofprofile.net/proofs/artist/a7945d5a-4e5f-4831-a065-5e69907190b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Christ lag in Todes Banden, BWV 4: VI. Aria "Hie ist das rechte Osterlamm"
J. S. Bach: A Life in Music (Vol. 1). Arnstadt & Mühlhausen (1703-1708), Early Cantatas
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 0xf5634b42862bc9c6641fe73da1f95760b5e6ca6a6ac1468af6515929bcaf1918. 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/FR7JM2387060.
Nach dir, Herr, verlanget mich, BWV 150: V. Aria "Zedern müssen von den Winden"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63de3c7ab0e16a98e28ab7a8cf9542ca0492350a655ecd59f5ed8d7eae6e85e. 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/FR7JM2387230.
Christ lag in Todesbanden: IVe. Aria "Den hat schon Christus vor der Welt"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5322338c96d3bdc685ee8ddea3fdb6b53ccf1ffb7f78c25ea79fbdb98a131602. 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/FR7JM2387160.
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
Gottes Zeit ist die allerbeste Zeit, BWV 106 "Actus tragicus": IIc. Aria "Bestelle dein Haus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d8dea80cc87bbc6ab31e0dae7577149de0506a4e14fd4705b69c7ddde9fdd9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR7JM2387290.
Gottes Zeit ist die allerbeste Zeit, BWV 106 "Actus tragicus": IIIb. Arioso e Corale "Heute wirst du mit mir"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d250d685329853856544289c773e37c032e910075e1e8e3e2c8c6427deab8d7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR7JM2387320.
St. Mark Passion: Hymn: Sing, my tongue, the glorious battle (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab466f9ae2e74f47b3a00c31b5ed7eebf4cce6591e1dc343789066985744961. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKI190831401.
St. Mark Passion: Second Gospel: And they came to a place which was named Gethsemane (Evangelist, Jesus, Chorus, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22183ca0e6e3e8187fe108687981c74f486e1b6a705b19a94bcb5739d63da985. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/HKI190831404.
St. Mark Passion: Third Gospel: And they led Jesus away to the high priests (Evangelist, High Priest, Jesus, Chorus, First maid, Peter, Second maid, Servants)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd012a5599281482c56dceeb475c8fc1334075505bfcdb4cda52056d488006c3f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKI190831406.
St. Mark Passion: Fifth Gospel: And they bring Him into the place Golgotha (Evangelist, Chorus, Jesus, Bystander)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4086cac339bda18542805d4138201feadf8a211594b10e8b9600b7f995fe0d83. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKI190831410.
Arise, my Muse : Then sound your instruments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8cf4b0262d1260d370110498ac57cc3ae5a679b162d1c03624cdf590a9cb77. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBQG52112204.
Arise, my Muse : And since the time's distress
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957db522b5d4a1f02808d90880ccd9b7e7e67ba04269cbf4afe02f7db65c5f9e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBQG52112207.
Arise, my Muse : To quell his country's foes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c872d8d1dd44ed92cff66d4087356edb7fa7cff6978efa3697039a5e82a0e7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBQG52112208.
Love's goddess sure : As much as we below shall mourn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827f5956022d7adb3918d3951ee4be4264f737630ddf6e37106d66297212efb7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBQG52112218.