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 0x8a390c8b976464614a7e60da70a180c2f0f95ee1d26051762df4c644f74a6495. 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/8877b34b-ddd8-4f7e-abe2-6d64d3ecb387.json and https://artists.proofprofile.net/proofs/artist/8877b34b-ddd8-4f7e-abe2-6d64d3ecb387.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Te Deum à 8, MWV B 15: II. Te Aeternum Patrem
Mendelssohn: Te Deum à 8, MWV B 15 & Other Works
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 0x44298cfed4be68f1927b78c1bdbbb14be0e26669e5afb07fac179312fc1f557f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEAD62003402.
Missa Gratias agimus tibi, ZWV 13: Vb. Agnus Dei II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c56703e9d3d4893e1691de1da1eb6d5418e24a3a7deb32ec8d53907e08c59f. 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/DEB112406016.
Des Heilands letzte Stunden, WoO 62: Wir schwören! Wir schwören!
Louis Spohr: Des Heilands letzte Stunden. Passionsoratorium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89bfac4e300ffb637445e247b43aeff37544c5bce55cd0586013060dd4cafbd. 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/DEB112500215.
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
Des Heilands letzte Stunden, WoO 62: Jesus, himmlische Liebe!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bdf56b36f7068fa17c6970f13b894f18ec9a947e5790e2dcb35af98e2a29658. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEB112500229.
Laudate pueri Dominum in F Major, ZWV 82
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a256958eaefc2691761fe759d194e2600b80aeda2230225c67e7f75df87f4cc. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB112406021.