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 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 0x3e2adf66d38527ba48d891ba8339adffbc53c29880019a0d62777d57f279c030. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a11bdff8-7316-42ff-a3e5-0e5e751e0a59.json and https://artists.proofprofile.net/proofs/artist/a11bdff8-7316-42ff-a3e5-0e5e751e0a59.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Blanchard & Colin de Blamont: Guerre des Te Deum
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 0x951b24307dfa51e371bc644cf3efbbbc84769b5b952388ea9de77e062b648934. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11827275 — a six-check JSON result.
Te Deum Laudamus, FCB.001: Te Deum Laudamus, FCB.001: IV. Sanctus Dominus Deus Sabaoth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1098b7788b94e4ced449b5565f8506c2e9d8539abff46b3d6a05a618b639fc6d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11827290 — a six-check JSON result.
In Exitu Israel: I. In exitu Israel de Ægypto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9c26a0aaf543e209527371f3f34fa17c8381bbb00e02b1272e769638246d6e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205429 — a six-check JSON result.
In Exitu Israel: II. Mare Vidit, Et Fugit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce83fa4bc5ab133c0edce8d26843bc938e77158ed3c9ec48d4fc78ab85e6f211. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205430 — a six-check JSON result.
In Exitu Israel: III. Jordanis Conversus Est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebe14b6a2fa3f3bd835812f6e6200268c6de83f523d1b64f92e9fbd2396adb9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205431 — a six-check JSON result.
In Exitu Israel: IV. Montes Exultaverunt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52cbd3101d391a5e5830a456d1b7c444dd2dd9f759d0e947c6b9b96cfae4e91. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205432 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5984300a67adc90a4d4bba13c6b0948dadd1509576480f56223c857c91fe2b41. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205433 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6b3672f6f02fe89945856a8465edba13221d3cca19564853675bc9fd1fc408. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205434 — a six-check JSON result.
In Exitu Israel: VIII. Non Mortui Laudabunt Te Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807e5f3d248121c68e22db2ad51f45737bc8ac8325a705d2d1607c401ba4c529. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205436 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2107b866475c8318baa1130794993377a28a9daf73e0924ccfa86eeb8a8f7e18. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205437 — a six-check JSON result.
Dominus Regnavit: II. Etenim Firmavit Orbem Terrae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcb28d4799c9b88c50c7a2758dab64ba402a5fcd9bed9b460290b91f523b35f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205438 — a six-check JSON result.
Dominus Regnavit: IV. Elevaverunt Flumina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e24412a47da15c6d79333021cbb3d14aafd9612ab7ae48d081d13ca5ca9ef3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205440 — a six-check JSON result.
Coeli Enarrant Gloriam Dei: I. Coeli Enarrant Gloriam Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740979d832b63314a90e8d6d71df084700f23262ede0e03b3abbade77eda37f6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205443 — a six-check JSON result.
Exaltabo te Domine, S.66: VIII. Audivit Dominus
Messe du Roi Soleil: Lully, Couperin & Delalande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc258e3bea6f490dbe5a969c0d5724597e80897c2c3e88c0efefa803cb05d82. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11828942 — a six-check JSON result.
Exaltabo te Domine, S.66: Exaltabo te Domine, S. 66: II. Psallite Domino
Les Grandes Eaux de Versailles (Musiques des fêtes royales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79311015a019ff74d6bbe74270bbded1aaf6be5e2a1dee465d1ace0308908c12. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W11828936 — a six-check JSON result.