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 0xe5aa430ce0fab0bf6c3b85c76826dba73fd59f1c35dce90c8315ab625588c5b5. 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/7e4ea594-65da-4f0f-9de3-0331aebf8364.json and https://artists.proofprofile.net/proofs/artist/7e4ea594-65da-4f0f-9de3-0331aebf8364.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x41819c09fea69a4b9cecb3fa96b16d0e13a827ffcdcaeca131467ef1825d4868. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USL4Q1841242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50baa39a06847d81fbad42a791fdf28554bdd6076abf7c979fd01d2f35bb635f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGWW2093522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8769cd0adfe795d5b8bec63b7305b15981ab1d3b699b257ff07792b446fd22. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZGWW2093523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfe80bf11aec2e692f58a039ccbd5228ec86ec4276ecf883c7fa22c1716c1e7. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZGWW2093524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97962ef955deeeedc925a72d0571bb570a4f2b76e550fc444149a5f74b08dc7. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZGWW2093526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024be2c0ba49b28eec0dee4c891cefe2fc6e278173391b63810c086e7eb714be. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USLZJ2061533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc404d13bdda4dc7728ab8c3cd7bd0d1df26b8eacb4b2b7035c5ea8d614c87123. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPJ32234886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0b061c358b03fe3e4ed1e305d10c8aa8f8adad7e5f3f23ea362896b7c95776. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:26:56Z), 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/GBRKQ2385571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cf388c4490749a7338b9fae1f16bee8fd5ae283726f6e4fa072eed79c3584a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:01:35Z), 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/GBRKQ2385625.