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 0x28f6da17e4ef218410422ecefdc75a30138eb8df18c330a1a54d8b64aeb1c510. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7e5f181-f606-48c0-b992-690911c36cd0.json and https://artists.proofprofile.net/proofs/artist/b7e5f181-f606-48c0-b992-690911c36cd0.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 0x146f09b84f6963526c02ede72292f553317fe87d1916a584cf7b7a29e882e26d. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZHN41974704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb43327926ccde85f23eea9d67fafa2291b07b66bcedf6a163b1af17ed36ebc. 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/FR26V1560235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed3b9afaf8230f2d764408d348531358b0b3e6b0e794d3c948249a3585616f5. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:16:44Z), 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/FR26V1564413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d999fb414d808d5aed575844e208ecca2b7a2774e83a38d4c30406374429ea3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:02Z), 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/FR26V1561940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf03f80d5008b20f3f00b98e61ab65f7400c1766e12ff8f491543321f7ba8677. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR26V1561942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b474c9293461fa0b32dd803b150c55c4aba26508309b2a078b92584890698cb. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FR26V1642898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e145daa1fc1ce238bf83881acddabfbb53961f75daf43cd0db4197e9df49541. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32014784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eea75a3465ed93c32c2753fe5ec4aabac881ecc0e53c7afde4b84307658308. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:45:34Z), 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/QZDA82020317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13612e26e1e513fcc60ae954df2856fa5b38daab8e6deb67185c86e2eed2e510. 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/QZHN72111272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc6f139d6b61214ba6abf36228cf6e53deb4916b17ed224b9cb4c7df2f2afe6. 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/QZHN42028321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7793cc5c76c7f027382e772c0cfde8770ef1fdc3207bb1e3a54f569a84c7e095. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:52Z), 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/QZHN62099837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec5e8dd479543243823afbc829edbec0724b798408d3c8593d336312338b390. 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/QZDA82437967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bfede4fdad4890a9dd77a29dfdd74f218e5b3daafe4956587675e1d288fbde. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHN32463938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e15e68048169e37234f11a2075c49ea468380288a5887ec11d24df18a53893f. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/QZHN62526911.