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 0xf5aa34eddb0f7162f0c66fe368b8e360bf2d43eb888615b9a70d80cb26151883. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83ced033-73e3-4a54-bbcb-13f9132e8049.json and https://artists.proofprofile.net/proofs/artist/83ced033-73e3-4a54-bbcb-13f9132e8049.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 0xa07b81e9bb87ec045beec582f68881853af27f02443c839827936a8fb964dddd. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCAJF2503027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc494d133c676da53e65e392b954785a0734793a3f036e37c046245d53776f0b5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJF2503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce6d5dcb0699c1c58d1eb23dcbeb57da927e9c732c709a9a94a1bf43c0a3ca2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:37Z), 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/TCAJF2503033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8773acdc2de5ddcad8609e2fdf9a7d31c90fe7a3c85d42786c581d9124e27. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:34:14Z), 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/TCAJF2503034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbccdfee4db30b29c40b95c9df3c6f218739ea577b08479acb2a3f2f7effee13. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJF2503037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ac7062bbefcf181928778db65d41cf5dd5e2985a743cfd33cacfdf30a9df6e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAJF2503040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73467263e4b9e6eb4abf171cc971db050ce5543c4e697c68d61ef5ab5d9845ec. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJF2503044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3354cffb227266b9c25f662d97010631764164eefac1d8a45209473fb9fb6808. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAJF2503045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd05fa5c4312c4f8565b49108a25c0691d1087657bf950f10967a172479e6f1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAJF2503047.