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 0x43168b4249e20bf7db3c58d6490d3b4df181f50d6db8e46a2eb9ad8a5fe00bef. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a8f72df-e04a-44e2-828c-b3e20a782775.json and https://artists.proofprofile.net/proofs/artist/3a8f72df-e04a-44e2-828c-b3e20a782775.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 0x9c4d759b49b079cd4b8978f2952195ed89e559f6518f5b72ed91d3733d35b724. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:54:10Z), 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/FRX872167565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caf97900d7469f2655e0f7a8b96dd6a40d99a7e84de5f7d6b0166c1844c46d9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FRX872167566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66907c51d848dfdf58c972f1e4a95e7d7844c9f55d8d47d64307e29d9d38d41a. 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/FRX872167567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20813b03740d5c06e7a1695567e2045c31c1ad67a714421cf03c31dd0aab49ef. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX872167568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7201f05eef394964a3a721b2e7a0623495006b96e717bc3a9fe046046b6bbe. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FRX872167569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb13ceabeaa02098debbc0257ecf80fbc87d5f86530bb9ff69d1475eda95d020. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FRX872167570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9a6346af442f2609e1b4fb4971131a4a006d350734768a27eb59041efa321e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:59:56Z), 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/FRX762215978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2714e6ef4a3a6572d37a60097fd3397b7f0748899169a8d8414a42ae416f3e18. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:37:41Z), 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/FRX762215979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a579d0e988adbb73e36eacd0477d88b911897a20234ced344d25272f62e062. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:39:46Z), 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/FRX762215980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942d61ca9df3e74929545f3783c953ce5cc91b6f4635b930de80be4be95bfe54. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX762215982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bb20c2918b23307a14468507e012d144beee71c0f4047a8bbe62003c812148. 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/FRX762215983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9e2b552c399a05bcd4f613074f7f96fc7fe9fb1bbb16917a535b410fe94bc6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX452392330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a65bc1b368ca1519306d671fc20bbc3c594c27c091b15585addcd0ce6da1c01. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:02:19Z), 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/FRX452392331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92744965d7f931f261c4deab8dacde245707830b96c01dee47e88c7a3825d572. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:30:40Z), 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/FRX452392332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48504331f255d78dca98bbe78ce6dfe36b91aeb4f10c3437fdc80f0ba656a86. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FRX452392333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca279021b3f87f8138afc15ab4a38bc9dc4d4f6895c87de1d472d411376db28f. 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/FRX452392334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd632eb6ab5453ffab3553b2e231a21f87441f47e8c02b1ca7ce31b5ac945c701. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/FRX452392335.