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 0x34d06b36a2a1ea8e15860c28627a41af9a2c539a7f2e7eea3fbd1b319519dbc0. Chain 2 (Bitcoin): anchored in block 954046 (2026-06-17T04:53:03Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41492ae9-2584-4df4-a753-36214a394206.json and https://artists.proofprofile.net/proofs/artist/41492ae9-2584-4df4-a753-36214a394206.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orchestra of the Württemberg State Opera
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 0x2b87c5ddb8beb96c64853f46ea6f20d2484976685bcddeea0d3c7b30a2d677e5. 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/DEA580900462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcdb569b004d4c7cd9cc4b6f364ac2b333a2b6dd878c82f6b550c4a6a11855a. 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/DEA580900461.
Eine Nacht in Venedig: Komm in die Gondel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a707fc3dfd6265e246a8ff49e55f73ee28d56b0db4ddd5fc4f98c4377ecfc63. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEA580800349.
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
Boccaccio, Act I: Hab' ich nur Deine Liebe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe003d777baa71d0ffb23e7a943a25cbd0a5cd49c1dbace75a4c74bdb2aa3b8. 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/DEA580800285.
Die Fledermaus: So muss allein.../O je o je
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0293f624942cd7757271e544cb789afcb3347983880b56b97f666497488bbeb. 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/DEA580800561.
Die Fledermaus, Akt II: Klänge der Heimat - Czardas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0109674106275e71fabd7bef47785c2de5b9c84269972ecfedeeb75465ab9e. 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/DEA580800554.
Der Zigeunerbaron, Act I: "Ja das Schreiben und das Lesen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d2edacd74911bc37aa5f5e4dd8738bc175617f065136de5b85715534f13995. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEA580800212.
Der Bettelstudent, Act I: "Und da soll man noch galant sein"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557e105ce3548ee32e1dbc99318c82c404a5e49b5a3ad06312f961771216bb25. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEA580900463.
Eine Nacht in Venedig: "Komm in die gondel"
Los Grandes de la Musica Clasica - Johann Strauss Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22aaa91a8deac848c7d28b6337c078c929f990463afed6ddb6118dcc96b9273. 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/QM6MZ1517458.