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 0x1fde657a6d2411a8f05c5274b100360ee82674098bf30d938f7da065cf5be76d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12bc6230-5cbb-4e26-8de3-f43b475d2e0d.json and https://artists.proofprofile.net/proofs/artist/12bc6230-5cbb-4e26-8de3-f43b475d2e0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Come, Sweet Death, BWV 478 (Arr. for 5 Cellos)
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 0xf320fcb0c69bf11402723ecb765bc7986f48329bc0307f489c087378b8cc37e7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBBBC2200367.
Elégie in C Minor, Op. 24 (Arr. Parkin for Cello Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29057bd4e38d730a686c90e3913fceccff04faca39f8b6e37749e91434c20e. 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/GBF071900780.
Bachianas Brasileiras No. 1: 2. Prelúdio (Modinha) (Arr. for 5 Cellos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128b938de05b581f4fb56339d5c9c8d20410506d7b909bb1d6b00567ac5861e4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBBC2200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf320fcb0c69bf11402723ecb765bc7986f48329bc0307f489c087378b8cc37e7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBBBC2200367.
J.S. Bach: Come, Sweet Death (Arr. for 5 Cellos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf320fcb0c69bf11402723ecb765bc7986f48329bc0307f489c087378b8cc37e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBBC2200367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29057bd4e38d730a686c90e3913fceccff04faca39f8b6e37749e91434c20e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBF071900780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde168a1c2ae2994457ff50e507a4d318ed94cd4871b7c586593488f5b40976d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBF071900790.
Fauré: Elégie in C Minor, Op. 24 (Arr. Parkin for Cello Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29057bd4e38d730a686c90e3913fceccff04faca39f8b6e37749e91434c20e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBF071900780.