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 0x44d6878bc8e67b060a5d582e38f8523430d458d358799949473ac9e195e1e276. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58eb214e-b3d6-475f-9c28-5fa14da6910d.json and https://artists.proofprofile.net/proofs/artist/58eb214e-b3d6-475f-9c28-5fa14da6910d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Salome, Op. 54, TrV 215 / Scene 1: "Wie schön ist die Prinzessin Salome heute Nacht!"
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 0x25f22482046f734c6e812be68755bd6b5a45f64e0d4cae656486001b21721182. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GBF076130201 — a six-check JSON result.
Salome, Op. 54, TrV 215 / Scene 1: "Nach mir wird Einer kommen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d01a8531a8fd1ade1a321102a3d189ff31a9481e39c7eb3d7f56ad0adec9a6f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBF076130202 — a six-check JSON result.
Salome, Op. 54, TrV 215 / Scene 2: "Siehe, der Herr ist gekommen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7984a187de3ab6b8df9e8c19256e726de73aee68ff8778f998d9ed7d0bb8053. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF076130204 — a six-check JSON result.
Salome, Op. 54, TrV 215 / Scene 2: "Jauchze nicht, du Land Palästina"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67084b237a5546f72d612646f5225de1117524c98855589cdc92b94fa58f49a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBF076130205 — a six-check JSON result.
Salome, Op. 54, TrV 215 / Scene 4: "Wo ist Salome?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad04d6eb8e2aacc1e5f04003fd9dff31b87749a63057c702f26f4a06fe2c2127. 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/GBF076130210 — a six-check JSON result.