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 0xc7faedac98e5700fc6a72c7709edfaf6cd10b7520bb12ca859cb56e2f2b93cf2. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcfd734c-e290-458f-b1b5-b70fb19882d5.json and https://artists.proofprofile.net/proofs/artist/fcfd734c-e290-458f-b1b5-b70fb19882d5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ein deutsches Requiem, Op. 45 (Bremen Version): I. Selig sind, die da Leid tragen
Philharmonisches Staatsorchester Hamburg
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 0x821e3d24c73b6452e9954b3a0a4eb0994b006f0ccf65e28d6c48128fe703c9a8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEAED2420010.
Ein deutsches Requiem, Op. 45 (Bremen Version): II. Denn alles Fleisch, es ist wie Gras
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd475b378ab7ee6f9630a1e98eed982c2c54fd9c50752b65f805086d9ba3d58. 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/SEAED2420020.
Ein deutsches Requiem, Op. 45 (Bremen Version): III. Herr, lehre doch mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4a7d52cce786f23f98b1860695b56cd50fc9f3c9f794794d956050259f6649. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SEAED2420030.
Ein deutsches Requiem, Op. 45 (Bremen Version): VI. Denn wir haben hie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7168fb5642f9921a832c99e43306e7d549084871870c4a0e85d75818063abacf. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/SEAED2420080.
Ein deutsches Requiem, Op. 45 (Bremen Version): IV. Wie lieblich sind Deine Wohnungen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c70eab3a4d6919b860799d5b4b6d1aaad23efed0a47405af17a156f11243b6. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SEAED2420070.
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
Ein deutsches Requiem, Op. 45 (Bremen Version): VII. Selig sind die Toten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1c3586d124abe3af07fc2b8f3cec5ede85df8f0922dfbb0f955b24a06d10a2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SEAED2420090.
Der Messias: 16. Kommt her und seht das Lamm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e4ebf6a05213ae5f8923d80af8bfa302e9f90e65b391a36dd8866b857e9fd9. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEAED2420110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345ceb53fdcdd93c1cdc1c8ddb2b2aaafb76ac9e82f80e73009b3f7833065d5a. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/SEAED2420130.