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 0x9008120a56126ffd1bd573c68ae80c730718c0b9daf52ab1f308343ce886fba0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/441f4426-75fd-4a77-ac33-584489576ee8.json and https://artists.proofprofile.net/proofs/artist/441f4426-75fd-4a77-ac33-584489576ee8.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 0x4dc0b48038ba6324fa1d5f3137e393745dd51d989ba4ddafa57ddf1e4a01bed1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDY42478547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cb1448f9218a51d8c8a284b88dbbb9a3794c0223af5832e5c9b7b163026b2a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZPLR2338138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee7bef75a2a08e98b477e0bb121e0e5a559e24a0afe08f6866986b768ead017. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTAS2211520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0287d6b4b4577c74efdb7ea628a8cb590a37bfda23ff01d65979ae242b2960b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB42294261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afd485c18e7cacdec092352535549c31d9f58eaf5e82fd80ed7ea0c1cec48b8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZPLR2338140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ba56b50555a7c0e7295df7de1d9d4126a4b645e0bc442c1c7a524e1bd74738. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZPLR2338139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0287d6b4b4577c74efdb7ea628a8cb590a37bfda23ff01d65979ae242b2960b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB42294261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee7bef75a2a08e98b477e0bb121e0e5a559e24a0afe08f6866986b768ead017. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAS2211520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a17b3c238ffd8ac985e314fff6fb4087906059ef47768b2f465ad3f4c11e7e. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), 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/USCGJ2290671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9515a5914b7bd2b3b06a04d1736533cc053694d592f1d0d9d5b5212e94ed7db1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ2290672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3e80604f45d0afe3fe80cbf64b2432ac7e690cd8468e8d9107ec84d3ac1091. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2290674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16d2be0daf16b986e725434afbf71f42fb90728c10bc954087ee8d9c77e76f4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGJ2290673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc926ee79096c214b43a98f42e225337c927f66190f55213560548bab293492. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USCGJ2290675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da6e45a8be8e5e3048ec3f34ad872a27b6d7607371df48a9b9eea34eaf7e9d9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USCGJ2290676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9a85190add64e3e5c533e67ded56440476ea42c0d04519cfb0fc9f9b430e79. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM92145382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe498c442f3bb37127ba304b5ea534be95828c6eb8ed0ed565f90f00aabc473a9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPLS2021735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1686da35b855c4410a4c34ed352bf6ffa5c72aae8a6b00905a180ac1dd989. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHNA1902957.