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 0x3c20286ff40dbfdb73c3bc50fe92139f6033aa21da3f6f74655f1c35e932b9e9. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2391909c-79f7-4efe-a6e3-1f396c05b4fb.json and https://artists.proofprofile.net/proofs/artist/2391909c-79f7-4efe-a6e3-1f396c05b4fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Weissagung des Leidens und Sterbens Jesu Christi
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 0xf8304bb2bab71722600b75918471f06adc7bc3626b1b929ebec0af20e4dc968d. 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/HKI192336402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c2d772aecab0da4c771d134bc82ac269876438149d60dd9b192416bc6a20e9. 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/HKI192336403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948005268451a7f7a2f72c3409fcf41c36b7f6857ee3575f570d55e6597ab22e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI192336407.
Christ lag in Todesbanden - Variation 1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ca65683c9352675b4f272198c10d72ac91fc96049af35b0d7e758f93bc8152. 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/HKI192336413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad11413e9ca6c34ccb57d61597ce0963c5b2daaa8377b2558c2fafe30f481e7. 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/HKI192336416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2573d7df34e7156afbf0f280d59a8e1c16bc2e5c48bb6abdea6a3c3b467cf290. 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/HKI191820403.
Jesu meines Lebens Leben, BuxWV 62: Jesu meines Lebens Leben, BuxWV 62
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c4bab7c2b4652469ed79618acbb15bc91734e0736548b91069787c0568664f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKI192336401.
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 0x1514241299d2ce4f08a9276b4c702fc633a435a55fc6c85f6fd40985e72dd27d. 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/HKI192336404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04387e009225e148d558d088b525b7cd0c3ae811a682a8efcd43518ab7d12e07. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HKI192336405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6054cd96b507b68d8d59c19e5091cd8040bebe02d1d72e1594949634ee18518. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192336408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b112ead35848d9c592dc19247705abadfeb73edba9c00666dcf1d222e984e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKI192336409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaefd180a6715d7798982b69384a4715b64ed36ef98907d6346c5c659c72d728. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKI192336410.
Christ lag in Todesbanden. Victimae Paschali Laudes (Gregorian chant)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe949f433160522526872becbe157a6ece2df33269300aa8e6c71cab06fcfc7c9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKI192336411.
Christ lag in Todesbanden. Victimae Paschali Laudes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03756c5077681e21291d0c7badb880cc599797eb665cf57a76cc558e4d72ce73. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI192336412.