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 0x68f919c481ba49da2f33b67c1330fb16156b39d9191b0979e15ab5d3071dd5e8. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c1458f9-0f5d-40b2-be98-db7d6dbb87a9.json and https://artists.proofprofile.net/proofs/artist/8c1458f9-0f5d-40b2-be98-db7d6dbb87a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Membra Jesu nostri, BuxWV 75, Ad genua "Ad uber portabimini": IV. Quid sum tibi responsurus
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 0xd0e0c1d4e45d1e55657af62df9865e2669e99208c4be561c1fd907527ab130ba. 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/ES59G2230211.
Membra Jesu nostri, BuxWV 75, Ad manus "Quid sunt plagae istae": V. In cruore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b70e1d6ed145003c1dd56ecef9ee52d5166c89114e8eed5ce1fa719c653ae9d. 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/ES59G2230218.
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
Membra Jesu nostri, BuxWV 75, Ad latus "Surge amica mea": IV. Ecce tibi aproponquo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a8bd943db9825545433be5c00184c5a429d5c1e66a91eae67a21e2255ac04. 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/ES59G2230223.
Membra Jesu nostri, BuxWV 75, Ad pectus "Sicut modo geniti infantes": II. Sicut modo geniti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cc0db145f2ef62536ed6a937a3194c35be6fd2d532b8201b17de3bc1ff9c05. 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/ES59G2230227.
Membra Jesu nostri, BuxWV 75, Ad pectus "Sicut modo geniti infantes": III. Salve salus Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16407777d21c715569c5339de81aeac994014ff34fbdc04ac74ef53f7879adcb. 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/ES59G2230228.