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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f389962508deb1e7f4fb4ac021ee1670ecbc56c596957a5c7a0861369a573ab. 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/6ef6213c-c2ac-4d14-b82f-c1dcda4dd652.json and https://artists.proofprofile.net/proofs/artist/6ef6213c-c2ac-4d14-b82f-c1dcda4dd652.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d2cda493b60abf64b0d23de0cc42ab87349b47f4d32c53a83eae343d95ee2. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZDA82163697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea2084715dc515b85af2e989896a081e1fae368277e9265f9257b337032e89f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHN32110949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570ed63d4b10cf3d159eb44f8f7c06da0210cf820c845e52253f885d34e4f555. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZFZ32227222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccd003e39edd113d24cab2dd31370760364582bf2822eb0778923cae585eddd. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZES92219167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e8a490af6c71e6579a398c08c83ff9b95caf64cf333984af7162cc51aa2efa. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TLREW2220677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b67409360a74c4afb9cd8945f8cb96f1dd022b24495b211a6e59fc51124170. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TLREW2231731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69d1f4ca3529e945771628235d5a55c726be3a059eb2f21890a292b6a763523. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZVEM2366428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ac43d127d65db17dfcdf25c7dc7c8c959d1a6712ed398f2bd53aeebf3c77bf. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZVEM2353332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc1daf8ed64eaf0e196d327c9274a059ebb9ed03b349039886a55b6ca1e6457. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZVEM2357288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209fb82996d27d90e64854fd671a9c2b83a6d108bfebee025652e610244926e0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZVEM2366430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b2e5a2b7c02356173803d0b40d4f794835815b28f1abac5baf5a12f908f7f7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZVEM2366099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec65bf63405d27b0f375a0ad8eb2f7dbd9525fc49fd4eca9ec6531e273843bf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZPEW2428278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9022ac1ea3ce83731a61de3223f4786c314db51637791146b21b33b8daeede96. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZPEW2406432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd102c24eb45ff3e9135c525d4d5e2b6b5d3fc9365bc61f641fb53969b29ab7b1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TLVEM2428934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5aa0702bae929e19effd77866cbdecc2f45221093675c6067f71a3b2aaf0edc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZPEW2442040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a5f02219c9183f67bf694ed5e841f1b9b1d0dbd694500a00892a2eccff074f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZPEW2440107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e212a16464287f691b2e8ba81b37cae621f5ce5841fde693566e3ef83040bc. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZPEW2445368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dde46e0b06ca3354202e77b403eaf22d250de937c0fbd021923576dfa0f7940. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZPEW2453736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0699ff1947145ca5e5fe71650a80052da67091242e45973dd9e9f7114b44e68. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/QT2VB2495146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff81dd42becbbaa19b67220f9f81d184051a8ad2888e1c21111809cb3ab20d11. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT2VB2486669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211ec567502415c98140314d918e82a68b1b09f94450da5d8a2e15e853c8b249. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QT2VB2434158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942977e91d8f51f56be764bdfa014cc39a05b4ff1173bd0a43aa1a3516e1f5a7. 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/QZVEM1810649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d74a2f1bb909c06fb03114953f1009510529500a1406aae61a2e28ba1a637f7. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZVEM1810652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3926829a27d2347aa67c771d95e81a36fc6f53d732f060b54eded77a52d68fd. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT4K42557136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688abd902974426aa287282435d4a3e37c6d1035d71c0b5905e26a5ac25507fa. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT4K42560330.