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 0x02f15546bbb14ac993c7088dafc515b14a4f147bf7df4c73fd310d1c9880bdca. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2c1b69b-4669-4f7d-b857-0c55b244c524.json and https://artists.proofprofile.net/proofs/artist/e2c1b69b-4669-4f7d-b857-0c55b244c524.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trio Zedern Mussen Von Den Winden (Nach Dir, Herr, Verlanget Mich)
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 0x3b5c6cc57ed8d80c982a9dce4e734c84391d6779a6e01ff175060dcf390679b7. 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/TCAJK2557540.
Sinfonia (Nach Dir, Herr, Verlanget Mich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3afba7101211ec050c1bf6c50b0e7af37c7f8a9b1110652943bb9d0d3f1bd64. 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/TCAJK2557493.
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
Coro Nach Dir, Herr, Verlanget Mich (Nach Dir, Herr, Verlanget Mich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92063b7040d33a05bd80c0d9bcb05b8a067cf9700da1f2d28b273a2927735ef8. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/TCAJK2557505.
Aria Doch Bin Und Bleibe Ich Vergnugt (Nach Dir, Herr, Verlanget Mich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf0215aeae973d580e2b6f3b9b09b57941cb2ce987e00ca27774ce683eb11c9. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/TCAJK2557522.
Coro Leite Mich in Deiner Wahrheit (Nach Dir, Herr, Verlanget Mich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a552f1dcca28dea75ccdb3bfa693d798310c860ddc407d8b13ecca36af24f01. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAJK2557528.
Coro Meine Augen Sehen Stets Zu Dem (Nach Dir, Herr, Verlanget Mich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550903427dba6bccf811752b339ca5629427e2102f81ef7112027d8fba1f4d1b. 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/TCAJL2557545.
Ciaccona Meine Tage in Dem Leide (Nach Dir, Herr, Verlanget Mich)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c49951e08de347fab90576a3432e5da89aaea37fc6f22c3f681f699f8d87e1d. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/TCAJK2557556.