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 0x551e3c578d160eab532baeecd1f2335ac9a53e6e776b4d96350c84f294818d79. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80f9abdd-204a-4a5c-b92b-95fa22b19223.json and https://artists.proofprofile.net/proofs/artist/80f9abdd-204a-4a5c-b92b-95fa22b19223.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Corelli: Christmas Concerto / Tartini: Cello Concerto in D Major / Vivaldi: Sinfonia for Strings
Concerto Grosso in G Minor, Op. 6, No. 8, "Christmas Concerto": I. Vivace - Grave
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 0xfcdbc75babc4618532b2102708f606439ca649a61ce279acf1c7b419a8579612. 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/HUA251012001.
Concerto Grosso in G Minor, Op. 6, No. 8, "Christmas Concerto": II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf960723abba3e37193987e78d2e7139e6d2a352acacc58e112aab75f86f967. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA251012002.
Concerto Grosso in G Minor, Op. 6, No. 8, "Christmas Concerto": III. Adagio - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4d15732f7e7d20cf69a38e10ae2d68c118cc3f1af1449ddf3fcbb88ab21374. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUA251012003.
Concerto Grosso in G Minor, Op. 6, No. 8, "Christmas Concerto": IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a7c98341286c1a46fdb82eebbf0f71c0195db73a7ea9970deb8d7ea16444e6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA251012004.
Concerto Grosso in G Minor, Op. 6, No. 8, "Christmas Concerto": V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f174496695ecc648ebe24fabe643403da3a9988de453e6a3678d3e2eb2149d7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA251012005.
Concerto Grosso in G Minor, Op. 6, No. 8, "Christmas Concerto": VI. Pastorale ad libitum: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ee4d6b00e3c1fcf6fcc69582d6b9eb32d8cecfa53e3ed10803d3193b73ae83. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUA251012006.
The 4 Seasons: Violin Concerto in F Minor, Op. 8, No. 4, RV 297, "L'inverno" (Winter): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d522c34918dabb10390df9b65b816b9b47f28452a8fc30495a0249c4b8a2291. 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/HUA250100514.