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 0xf3c3effe400caa174e5433d3d1017a1d78ff3793ba3806748c856606e739ff7b. 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/df2f5de2-c618-4d6b-9ae3-08d17c8bebae.json and https://artists.proofprofile.net/proofs/artist/df2f5de2-c618-4d6b-9ae3-08d17c8bebae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trío Rigoletto: Chamber Music for Two Flutes and Piano
Vaughan Williams: 3 Studies in English Folk Song (Arr. Flute & Piano)
Lumina: Flute Transcriptions by Katrina Penman
Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): I. Adagio
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 0x6824ba45adc5a1d50320da49587e11f7ea00a9f91715563180989fed05f9fcd4. 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/DEPI82450010.
Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): II. Andante Sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57600f5e72fc2cdb4461c75513fd83411e5b0b95a698565d2acf0e042824412f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEPI82450011.
Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): III. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2903c2b926cfb9bef895dfffdd8254f57a7a1dda49bf406072180adbf6e22b. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/DEPI82450012.
Six Studies in English Folk Song (Arr. Flute & Piano by Katrina Penman): IV. Lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee1421040e55821fab23bf210d2521f658ef9ec6ee5d254170ce5701ca9f052. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEPI82450013.
Ave Maria (Transcription by Katrina Penman for Alto Flute and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8508ac59d2ee686ea054c207f4ec16ad80304463926fbf90d7ddd991c1817aa. 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/DEPI82450017.
'Atalia' - Contemporary & Classical Masterworks, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2903c2b926cfb9bef895dfffdd8254f57a7a1dda49bf406072180adbf6e22b. 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/DEPI82450012.
'Atalia' - Contemporary & Classical Masterworks, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e089c256f04c55de092388aeceffa003744063b5a6ff755e3eafe54b802cd6e. 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/DEPI82509611.
Grand Concert Fantasy, Op. 5 (Sobre "Un Ballo in Maschera" De Verdi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340a18009a73e9f7199b9ae6aedc2668460ad2c4259c401335987f03cd6e4cce. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEPI82509613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe285bccc07c2d28903bf16afa767fd0b5e968865f412a8b563ece21f697eea6f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEPI82509616.
'Atalia' - Contemporary & Classical Masterworks, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d32e3a32d3e7d8dce7962196fc90172a974bc429dda0d8a4247365c936e0a00. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEPI82509612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee1421040e55821fab23bf210d2521f658ef9ec6ee5d254170ce5701ca9f052. 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/DEPI82450013.
'Atalia' - Contemporary & Classical Masterworks, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2132bc39d7a5ae30592261047aa5442dc52d3a4d250d1c31b2f751a6f24b55e4. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEPI82509615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57600f5e72fc2cdb4461c75513fd83411e5b0b95a698565d2acf0e042824412f. 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/DEPI82450011.