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 0x023e39bc777b1b4e562e5373d31b67dbe755fe4b6d43eeb96daa8825eff0a956. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15640ca4-ed03-4975-8f41-13ce1e0d9e1b.json and https://artists.proofprofile.net/proofs/artist/15640ca4-ed03-4975-8f41-13ce1e0d9e1b.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 0x589aeac324fb2b23c4b9a9be26de72a0acc5c966652874ee5b01dc75babfcee6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM2PV1606512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b087c68691e40456fdf9300901f19e1e6fc4c655d4af3c4bbc7ccb8b0b04b2. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/CAINH1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1846a22055b548f9a385e52073b8839b27c7f4a1aa52d6913360ae4ebc9140d4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:52:11Z), 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/CAINH1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660829c3f32d1ab5861143a67d2b4db2563b2a83e8c05e9715b8c81b49eca5a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CAINH1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908f10a102c7fa2165d50478ef599b24694fe16cb5c3a46dca9abbee1f91ba97. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAINH2200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4780d1a205a28f00e459fb8c31d56b9e01d59cfc4cd216d7924940ffd360287b. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CAINH2200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c7499aeeea33b421a1943a04c05430ca266b9f881a17cd4cb41cc6668a15cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAINH2200607.