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 0x1527fef0f6351e90e07e697a4a2e8ddcc602eca21b96e8b7198205c0efb87c12. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/864346d5-5831-49a8-a791-042ef68302a4.json and https://artists.proofprofile.net/proofs/artist/864346d5-5831-49a8-a791-042ef68302a4.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 0xcbb4c9d4801e0ba20bc69dd76f43a772424ab8e16b50c7d6b5f2986963fd4173. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:26:34Z), 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/ATUM71800249.
J.S. Bach: Concerto for 2 Violins in D Minor, BWV 1043 (Arr. Janoska Ensemble): I. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825c9b3c4e9cda6c2160238b9242f74c0f841163cee557482e9b1149f8bebebe. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATUM72200233.
J.S. Bach: Concerto for 2 Violins in D Minor, BWV 1043 (Arr. Janoska Ensemble): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb76942222035a7e81d185a99bf4eeff5b7b899a5e964be3cde389605db118fe. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ATUM72200235.
Beethoven: Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique" (Arr. Janoska Ensemble): II. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af01d078ce0130e2b76ea6eda8c9beb35fae0f04ad2612fca02ead6b9df7675. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATUM72200223.
Souvenir pour Elise (Based on Beethoven's "For Elise")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176f77a135c2adee8224b7ed1d466c367ee0822544aa818f043a184a1769fbdc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ATUM72200221.
Bartók: Romanian Folk Dances in Janoska Style: I. Jocul cu bâta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb081a112dab7ee8ff80423c344bf6eca9fcf890f4caf0c2a1527a25fa3057c72. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ATUM72200224.
Janoska Bells (Paraphrase on Jingle Bells in Janoska Style)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0596a08c78a697dea4b7d947a8e9c502f4e8c7524b842033bed1af4d7c3fe8. 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/ATUM72100155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7ed9c4bfbbd7901a14cd9cefc930a6e7794a89411a31e4830e15a1359147f7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ATUM72100149.
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