1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x1338b20a75c22ade7dc2937d0fdea3b8d5efad701fda9413b1f40741942c0240. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/397ddabc-2eaf-4cef-8170-9eb702ed5f0e.json and https://artists.proofprofile.net/proofs/artist/397ddabc-2eaf-4cef-8170-9eb702ed5f0e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sonata 7 (Allegro Poco) - Antonio Vivaldi
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 → block OTSBitcoinBlock must exist at that height 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 0x19e2b5ef7623c8542f8ca964d55457b9211241059a83f7087ac847c77f69d108. 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/QM4TW2039238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0f1222ad5ef2d03c6959bcdb60765d774b15e6d89ba7496108b375c366035d. 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/QM4TX1809251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360754e3b9999b07b9520277a5c4acdf14333240b49e55ca3b8e93aaae90979e. 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/QM6N21735690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2584a67ff53c05ab50f4193d38f2b81a2a362a61cee7972a0d8d9c3e99339065. 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/QM6N21735691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c05486c82119645785c562a93cb506ca132d9dc744cb5abec5353866bf17cfc. 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/QM6N21735695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7133a2a812ccbe59c8e682eaabda1a6bf5916ac57e9054c166df57c8f43fe594. 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/QM6N21735701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1550dc6e0b20bd9c0176781991703c01755c20e961606ec3d8527e298b99e574. 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/QMFMG1579702.
Guitar Concerto - second movement - solo version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909fb26b3d4c1eeb0c9f6bcbebd9cf57afd0a36853f6f4f7fdc8b7a3424cd271. 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/USA560602344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2623a262a58a81ed9be01041bff9082c29f7812be5687cc1a9e5eb9d5077889. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA560602345.