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 0x331d5f7a2175c589053f8ca95c7cac5f31dc02fd5bbb1568c35ee562063279d6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c9e0a8c-bdad-417c-82ee-2432b012a20a.json and https://artists.proofprofile.net/proofs/artist/7c9e0a8c-bdad-417c-82ee-2432b012a20a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carissimi, Donizetti & Schumann: Mary Stuart Queen of Scots
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 0x3e7b2a31672c9ceef35a410564285304c0e7dd12d0ea222f1f71e9393c1e4209. 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/SEBAC9513110.
Maria Stuarda: Anna! - Io vi rivedo alfin - Deh! Tu di un'umile preghiera il suono
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe672615e106fc0d8fb7611cc12d58a04c49395ff16b3e880474e81e9224f0e59. 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/SEBAC9513120.
Maria Stuarda: O colpo! - E già vicino del tuo morir l'istante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1198f8a3016490eb6a9f3551d7702252fc588ae77266ecceccd40e86cc83d5. 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/SEBAC9513130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71e354cffdd6ce79c01216ade7b00e9a14b69b57e39bfaa78a275b4b59d8806. 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/SEBAC9513140.
Maria Stuarda: Ah! Se un giorno da queste ritorte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362d27c8db6e74e670dd518e6611315c1ec2ed971ef9cfb9862344105de32347. 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/SEBAC9513150.
Maria Stuarda: Act III: Anna! - Io vi rivedo alfin - Deh! Tu di un'umile preghiera il suono
Maria Stuarda: Act III: O colpo! - E gia vicino del tuo morir l'istante
Maria Stuarda: Act III: Last Scene: Giunge il Conte
Maria Stuarda: Act III: Ah! se un giorno de queste ritorte