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 0x6fa1c064bd1cf52128c71361b2ce1a60d166a0ce53d57dc0a21bc6c0590dccd4. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a24939ef-7ab4-48eb-b5d6-6cded9f8eb6e.json and https://artists.proofprofile.net/proofs/artist/a24939ef-7ab4-48eb-b5d6-6cded9f8eb6e.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 0x0f51e6c05a47c1522e79b7aedff33a0e4ef6a52e9e6a7bcd9d9667a2e5b69952. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:35:41Z), 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/QZZ7S2492734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346f1562c368d79f67ba4165a68cf2c4bee0ab79613e03b405abe8a160fca6ac. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6H2593157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312646dc1ce117ddaac892081526df20b95406357850517f3e1c00bc427d1d5e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:06Z), 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/QZK6H2593158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a81d33865da33106046bdc0c28cce495f2d687cb1ecf57a819012468e232f3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6H2593160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a38f540282c4c44639dfd51818a6eddc05da1bd8e4cfe5837ec0109c411323. 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/QZNWU2413151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59db2942e90133a01e57268205e45ed645e0d83b802ab16195948a2ab5e81f1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6H2593162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6ef35f94a9c3795985487218bb29970995ab1e14603ce3cadddbe82a75ecbb. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:59:53Z), 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/QZK6H2593164.