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 0xbd782d54b23c9a4f2584a5fc17559d624715809eb46125af6feb660274eaf400. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e55574c5-a46b-412d-8700-9cf47b0c4fec.json and https://artists.proofprofile.net/proofs/artist/e55574c5-a46b-412d-8700-9cf47b0c4fec.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 0x047869be23e0df8c1fa0809729fc8bf3cc8d36ad41ffdae4b0aacfb740029e41. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZDA62537955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef00dd499602f67bdb42a2c143d7f0055c757469e36962200f61b923a9f9093. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA62537959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef59a429c46b9cc8bfd7786404091be2fcc91fbe2cb502df331423f1f6fea2b. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZDA62537964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2099fb5e14785d51b195a18fb4cdbccd5540db8b884bdb65810d983ca4d36d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62539596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9248c7aa2c4ae38eceecd2b64797f127d004b39dbc2bfa4dedbb77e8b3f0bd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN52514748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffca69e347eb42436b843abc3c9b0255b4713ee99d1a98095944973d18932d9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN52514749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3e9b5fa1fcaee58b0944bd6b5eb2b4fc7434527e90a8e934ed2b27b10e99bb. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:54Z), 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/QZHN52514750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebc365cd1af1b027d42dfb2f9800f539bc8db2630bcb0432f80e7f8c934c910. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZHN52514751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa059986d213917dbcc9138886274fd87fdb5f8c83141548caf934fb6d7ad2f88. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN72504436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ae78d4ec4529064de433d3f2c39a283690fed1862fc70b1bc935c276c486c0. 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/QZHN72504443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23049086c4353d5bf792ef724f3a5baa6f8166634103380415b4a9653daca461. 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/QZHNC2562126.