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 0x57acf9fc150b6570d7bfada8409cd588e10edb550b875ec1e6504b339a17cfff. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e9b6d44-3e67-495d-9ca3-540878a85c1c.json and https://artists.proofprofile.net/proofs/artist/4e9b6d44-3e67-495d-9ca3-540878a85c1c.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 0x5c138c0e5fe1d7a509f90a46a5d472cee795546893cb27a1708cfc12a27cb9b3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:06:58Z), 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/EGA010549720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd9011ecc6ed982d3320f617f081cff21a16207cbbf84fe24ce1b9dcd281230. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:53:00Z), 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/EGA010552097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198a3a1f96f22aa60701735b165aa53439914f3b997a4b7755406c804014f23b. 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/EGA010554303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521814929f8818aeffe3bc508bb5f75a63f84abed8819283bd69e1a61bfa081d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA72396007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2647fd6a395b0f7075c187c2d04c595da80d7ef01335fed88ecbb34d02c0c6b1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:46Z), 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/AEA142400523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e748728b10a0eaaedaaa80d5f9baf776a2fb1fa0f186cf366acc0b1ca82485. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/EGA010562573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f2e92a0e0ab9bf97155b10c9cbbedda82cc981f11d14f8f7a510923493607c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/EGA010563024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59175a14af1dd506b1face9f7c9cc1e29a98cf7eff2a810582e00781332ec8b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:14Z), 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/EGA010564596.