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 0x199bc65a74be18558625a297bdf570edd32af138687bdca8f8bd191f562ba1ce. 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/3e891632-5e57-46ee-880f-2ca931da5913.json and https://artists.proofprofile.net/proofs/artist/3e891632-5e57-46ee-880f-2ca931da5913.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 0x24570732ff68e80d0ffba1d9fc970c2f502c79a27b989f6fe6156df9930eea46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL5HJ2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de1ea043e57d4a87f517523dc55339480af3e6c558b224e3810e1d0fd99e1da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL5HJ2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb5b61ed08313b28e3283b653cc7dd0c0f6ebe2ec46c58185e54bf4f222f22c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL5HJ2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a3e297a70b1d3cc3331b2785ef73bd4ab73a9b83fd1adcce0fb0b677362ff1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLB8R2000314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6926f1de5fcf86fa85fec9d8a48be93d1db50369f27ed377993f3aaf77ca0c2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLB8R2000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a009af074427ee7226bee305ac4b4607f8cccc19575d2a4bd0b46dda14be609. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLB8R2000303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce164be90e754459648ad78afbe01a1ced7652b341615fded2f69fda3000c8aa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLB8R2000311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf087c86305d5d329cc10ebf79cbc786fb50f8c7281fc69e22ff45013bcc51bc8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLB8R2000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa962833c1972518b1a93fd63f901540c88e9775bd9c35b6f860ce87faa65016c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLB8R2000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d6127acdf6e4bf6ea3cddc046f7f03456dc115c84892fcafa4587318e6a7aa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLB8R2000316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda69cdb8a2eb7af41f5d12d9282c4fd060a739ad55093767cfef966333bbc54. 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/NLB8R2000318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d8b9971495416eeda56514262db9b9da096d5c393ed918b0c361dfc552ecdf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLB8R2000308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c23e172bf3e27fff004f883868f99ae8a27298d0b2b7198f4210fab7a76f48. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLB8R2000319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e8a57a85b549260dfa08d9e88ca72b189f0039c4eabd036968971fe9b70c8a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL5HJ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6260fcfedd26329e3470837eea3d06b6445d5d3a3d93cfd1f146a53cfac936. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5HJ2100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae67b9942b0c358fd0e2e45994bb170da0e863715f7dabbe56f0abb692f9087c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NL5HJ2100177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c7b58dd1c5c2a5a9cdeff5e32073a74b311e52408bf03ce270442c8910277a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL5HJ2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215a6edd91028fb2f4f5b6ce33056d412d0287d3332c768f44a6633a7f2da61b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL5HJ2200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721d74e31989e8df1a5f5bff598d6b50a8e4526c8e0502b1885f64685ba7521a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5HJ2200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f5f8286acbb373a1bcd4c3ac2e93c04e99251a7fc0c1f91ca441b44db281b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NL5HJ2200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5464aa3ee01ca2da5e38d2b156b5b91030f8adafd0bc63fbf30e92673afa47fc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL5HJ2200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ec0440c002f6899440491b4354cf3d4d049900260381f78d1bee1624e6c540. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5HJ2200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d5eda6f2b1a4ec36ec61887db04c8d542fbd30af7d3f70b48afbc1ff0ed96c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL5HJ2200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1161de72bbdf43465cc1fad423a30822d128066d2a805fc0ceb836aed458bf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL5HJ2200215.