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 0xc49f5bc2b9bb165235713b4967ec3e6452da78384a9e5a82755e50a3a386edda. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b90cce79-e6a0-417f-aa02-e6c0d597b0b8.json and https://artists.proofprofile.net/proofs/artist/b90cce79-e6a0-417f-aa02-e6c0d597b0b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Psalm 42, Op. 42, MWV A 15: III. Recitativ. Sopran und Chor "Meine Thranen sind meine"
Mendelssohn: Psaumes (Psalms) 115, 95, 42
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 0x41fb47a35270cb3c9e691af1f7d43aeab501bc8161521740c7b72774a11e6bba. 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/CH1407263512.
Psalm 42, Op. 42, MWV A 15: VII. Schlußchor "Was betrubst du dich meine Seele"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec83f14af5f611f963d4d3efda67a437a84608a50ab460b0a1429834ef520b51. 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/CH1407263516.
Psalm 115, Op. 31, MWV A 9: I. Chor "Nicht unser Namen, Herr"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e3a6b22122dbd94ca3623a9d21a81d565e3ac2241f5e4e2a27478f5f0908f1. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/CH1407263501.
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
Psalm 115, Op. 31, MWV A 9: II. Duett mit Chor "Israel hofft auf dich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6238c595f20f67cea06b6eaf2f1cb1ad894f9ca20a4676faa3721fa66645ad1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1407263502.
Psalm 115, Op. 31, MWV A 9: IV. Chor "Die Todten werden dich nicht loben, o Herr"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ed808c7450857117982eae8c20ca657ae4914d8abbca5d5c5151dca39ae036. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1407263504.
Psalm 42, Op. 42, MWV A 15: I. Chor "Wie der Hirsch schreit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab34b67ed6498d99a6484634797b9df2550bce7dd145abddf528a5b6f6e58159. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/CH1407263510.