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 0x78da8b67c9370fcf20563188b4b6699845916ba6853b34027ac62a5109abc323. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7e6faeb-6a67-480a-b50f-ea25ed1c0719.json and https://artists.proofprofile.net/proofs/artist/e7e6faeb-6a67-480a-b50f-ea25ed1c0719.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 0x43e88686ab7d27623492bacab15fe6e9e09c0c11c2fab680aacc45d36b0d2b1f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:57:53Z), 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/NL1AP2083172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca8cf2e8dad8e2fd3ffd1a906d5dc959b86d8c1b7f60f763c1b820e91131967. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL4NL2003743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d8fee49e385d8f61ae9f5e799940832f9df3a8507aaaba51117d75b45c7a6a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL4NL2145945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe6715205f50c3f68dda21baf87cca5a78308cb8dff906e896e43b6f24cad39. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:10Z), 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/QZWFH2311472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71f8af64959fa6393212b984d687a7474edb6545fdc562c2b54257add4d1b8b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2431790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc491fd5a3d82389034a55e4abe0e506a16356d3a16c93117fe57b4ebc7280ff. 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/QZWFH2451486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da4dc09b5ea0932ebcf4bfd7f88e0206f4b8581be8bd333465969d71295062e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZWFV2458928.