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 0xfe95894d9ea2c9cdb22e5eda66f8221bb735c1ce1a1caf25cf3efb00f5b93598. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99c2ab4f-f461-489d-a71c-d8f73750077e.json and https://artists.proofprofile.net/proofs/artist/99c2ab4f-f461-489d-a71c-d8f73750077e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Passion selon St-Jean, 1ère partie: Trahison & arrestation (Saint Jean 18, 1-14): Récitatif, BWV 245
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 0x8ee93700711af72ec879c4c26149a2a0680fa463ff8574acca368262cece161e. 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/FRZ299541040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc616e5dbc910c579d5d0c776f678acd23b71a6290b753f6742bd6c277e8655. 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/FRZ299541080.
Passion selon St-Jean, 1ère partie: Trahison & arrestation (Saint Jean 18, 1-14): Arie von den stricken meiner sunden, BWV 245
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7187aa088880b94bad91cff1a45f3c270c5fa16f7a15ecea2bf0b24bf4978432. 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/FRZ299541110.
Passion selon St-Jean, 1ère partie: Reniement (Saint Jean 18, 15-27 - Saint Mathieu 26, 75): Arie Ich folge dir gleichfalls mit freudingen schritten, BWV 245
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d33c90422c706405ab5201c94dfbe00489baabe67450716154a96320d6a3413. 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/FRZ299541130.
Passion selon St-Jean, 1ère partie: Reniement (Saint Jean 18, 15-27 - Saint Mathieu 26, 75): Récitatif, BWV 245
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc350d68f363ed687b2baab234616282e520c49d8481c83dc79875b3484582b7. 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/FRZ299541180.
Passion selon St-Jean, 1ère partie: Trahison & arrestation (Saint Jean 18, 1-14): Choeur, BWV 245 Herr, unser herrscher, dessen ruhm, BWV 245
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d94a3e390f059568281ee11e30c6b1cf79a7eb17a2bf7d7261ebb943fae0bb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FRZ299541010.
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 0x6c6f209ef454337c8b607449daeb81468c0d9a6c40f0460b59795b7c5651d2ca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ299541020.
Passion selon St-Jean, 1ère partie: Trahison & arrestation (Saint Jean 18, 1-14): Chorale O grosse lieb, O lieb ohn alle masse, BWV 245
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705c589a14f41e5bdab3f4f095e0e9490b569c4bd20cd2cfdc26a998a97f69e3. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FRZ299541070.
Passion selon St-Jean, 1ère partie: Trahison & arrestation (Saint Jean 18, 1-14): Chorale Dein will gescheh, Herr Gott, zugleich, BWV 245
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe453ed4f2dd06513ae9e1688628307dd31a705fdea1fd1f5889e035c6bc92425. 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/FRZ299541090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7768be99eb9e210f0736afb87dd529c4576a277285c9aa6055f19b26eeae9f9f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRZ299541100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed77b2f999a57de5b777e3aea9eea73e980399aaf2eefd6b17ea049e2fdd1f77. 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/FRZ299541140.
Passion selon St-Jean, 1ère partie: Reniement (Saint Jean 18, 15-27 - Saint Mathieu 26, 75): Chorale Wer hat dich so geschalgen, BWV 245
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50de669e4be813e65888325489ec42f4a2d29b969de97712e5c8e9b0b2cd8c96. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ299541150.