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 0xa6bfccb51747f371dc2eddfa78ad37ae90413fbbf3b3b304cb0a3090f1ffbf91. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd9837e1-9f30-4228-afc5-d2729f0f1c1d.json and https://artists.proofprofile.net/proofs/artist/fd9837e1-9f30-4228-afc5-d2729f0f1c1d.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 0xf90dc82c3e93478df0d0ef9f04cde6d9eaa435cecd00a6dbf1bd929bdb7d288a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:54:37Z), 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/QM4DW1854912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c490ace4476705e00d68583c677b589dc96cc0df5f33eb4b3317f376159bcb. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QM4DW1855719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1bab560b6808fba2df5c4db3c7b1c9c68851f3d06aa7ce44c6456c262050cd. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/UST8K1847442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6055dbcf9bbdccc0fc144a0ff13d04786eab001df73f650dc1df38e55ba40f40. 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/QZFZ61951108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23acecf75c123e9e8ebbd81f4be4138b861de50b649bbe3a1c5a7f4d436924ad. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZK6N2260079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85487d6e3eab2ecd1c4a8fca25c44bf738f4be340c2510ac8a61f24c78bf556f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:31Z), 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/QZK6N2260080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73863497f813b2ad8d1382521b584dc2d3ad52234c74207013584a9f1c9381bf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6N2260081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541d3535d33a29f01fcdfc80ed2a5c967b25c2655ddefe3449576aaaf366d819. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:42Z), 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/QZHN82453720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a64a2dcf15b5f184256cce5a50a459b4a10352d080b8867cf5c8729a688a7c7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:25Z), 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/QZES72248939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16c0464b96434a796f1e0b36dad163b02cf3a96af48d6ab050e5b284b9e9798. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN82453721.