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 0x8a1bff65800740e6fbddbfa9d851abb02ea1200fe4cb939bb8179bcb707e0c76. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/baaa329c-acc8-4105-9097-903a5eb69643.json and https://artists.proofprofile.net/proofs/artist/baaa329c-acc8-4105-9097-903a5eb69643.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x04980f65bc764656f4858e2fea60bc09f2a23ab4a23023bea3653821e82be7d5. 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/DEA559321247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6244707874e546cc96c94ea63403d1d7528718eaf59cb2cba5d6bd381cae6fd. 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/DEA559321246.
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
Denn er hat seinen Engeln befohlen uber dir, "Psalm 91"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8b32379554f6316b834e048555af1429b151c9b007ccf4e6ab32462f3a535. 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/DEA550010764.
Deutsche Messe, D. 872: Zum Sanctus: Heilig, heilig ist der Herr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d4d0bba4ca6396c36abe1974ca394e459475e6dab4d7e8b6709051783f255d. 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/DEA550010768.
Jochen Klepper und seine Zeitgenossen (Ja, ich will euch tragen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f4340e4f75f9a6bd8a4658806f2cc099fbb01b60a8b073b3486cbc1ad793e9. 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/DEA550306119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc294357a5d3b3e10a8364e3598f6b6f6206052b95363c5dda20e063a18e67b1b. 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/DEA550306124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e7e3649a1f4f16a16f8e6e0d4475fba52930d3bd882e217710e410bf435b7c. 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/DEA550306110.
Gott wohnt in einem Lichte (arr. G.P. Telemann and G. Schnitter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afec498bbad3888066566747efc2536ac41cc723ebe1cc5e2554ebd3d1a53c4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEA550306117.
Paul Gerhardt - Die güldne Sonne - Die schönsten Choräle
Trägst du mich, Herr: Trauer Trost Hoffnung Zuversicht
Klassik zur Taufe - Classical Music for christening