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 0x914e89a867efb0328253097140d1bc04a35706018c3c2c8a387955b95e27e3b5. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d647cd8e-ca60-487a-bdaa-4a028db3c034.json and https://artists.proofprofile.net/proofs/artist/d647cd8e-ca60-487a-bdaa-4a028db3c034.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Praetorius: Missa in Festo Sanctissimae Trinitatis
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 0x5c432f58bff54f28cbd9953b15c6925c3cab9f9bd6b5787225b75fbaeac7fd2c. 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/DEB201495408.
Missa in festo Sanctissimae Trinitatis: V. Credo. Wir gläuben all an einen Gott
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552ff01a1c422c99de4e0a12147817a067faff47717582f05e4a9aa8d926a324. 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/DEB201495409.
Missa in festo Sanctissimae Trinitatis: VII. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e7240e10f85ebb8f1cc8a49050b571952969b0bbd330a394a46ba1e4a5440a. 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/DEB201495415.
Missa in festo Sanctissimae Trinitatis: I. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a682cedda3febb1ca53d72f14dd6c1faedaa8ee476b03da7549f4c6a94cba6. 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/DEB201495402.
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
Missa in festo Sanctissimae Trinitatis: II. Christe eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906e611f11ac163d60b3f34feeecdc68191a3fa0a8907fc62e809df0b840a83e. 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/DEB201495403.
Missa in festo Sanctissimae Trinitatis: III. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7666bb5af3b18295d4c83d2922b9c0d8218ce2345576948f5ef4ccb2d61a73. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEB201495404.
Missa in festo Sanctissimae Trinitatis: VI. Sanctus, Benedictus "Sanctus Dominus Deus Sabaoth"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e2c87f414665e2c4f7632f58b9fc0824b1628d53694a2d5a1af777e6b6193f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEB201495412.