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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d2c4a4e1ac936c2c08cbd2a96048cac827098bb27682fd12a5a25069cda8fb. 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/5eafd766-8d14-4c35-8914-537c257f18f9.json and https://artists.proofprofile.net/proofs/artist/5eafd766-8d14-4c35-8914-537c257f18f9.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee56f03bb89c20fc998a9869c13671457a8bffe6ff61ed92dc67cd67033b884. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAFP2187976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670189d0daa56a6cc1d450846942416d1e284babd46bcbf4b321674fb04f2783. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAFR2143682.
Chopin Nocturne in C-Sharp Minor, Op. 27, No. 1 (Arr. for Piano by N. LaViolette)
Chopin Nocturne in E Major, Op. 62, No. 2 (Arr. for Piano by N. LaViolette)
Mozart Sonata No. 2 in F Major, K. 280: II. Adagio (Arr. for Piano by N. LaViolette)
Leo Toccata No. 3 in G Minor (Arr. for Piano by N. LaViolette)
Vivaldi Winter: II. Largo (Arr. for Piano by N. LaViolette)
Bach French Suite No. 6 in E Major, BWV 817: 3: Sarabande (Arr. for Piano by N. LaViolette)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697988d1bd8789683bcb651f5ccc12b2d852bb3b7405ec2457f9a0503e738438. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/AUGBT2402867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5627c73855841957c37699eac12346dab40606cdf3b7271f8a8c28ea7a45264. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/AUGBT2419581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dbbbc661e3c0673ed2d70b71dc7611a4592d78c40e1abd21f68d1c545b5bff. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/AUGBT2459028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dbd8e38a1486d4a76a0b4b0deb5dc2d7140d88adeeccc7416a08afceede1d0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUGBT2461524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f38f3c08372d8809768dfd408c5aaa5f48fa4d0bbea7496fde9e9443990a7c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/AUGBT2488931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110e661dac86060a46204e70327da32ae599dcd9e1699afa829da8c56e612d95. 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/AUMEV2542580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779dbc0f65e551c2ea99f5be660856e48b2b5400cce77149f751a055bdcfdf82. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/AUMEV2552755.