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 0xdee37be5324742ae3effcdc0bf569f73252e3edde0883b68c5e6acdea8cdaf6b. 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/f6df56b1-542c-4d00-9e31-37096a72a208.json and https://artists.proofprofile.net/proofs/artist/f6df56b1-542c-4d00-9e31-37096a72a208.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 0xe9b6a899439a92dcec9a5d566ee2329f95157e14528dd033407798937969f3af. 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/GB8KE2209218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f9fc031f3b0d2ef85b490190d4be16f1106bfcab8fa3c5cbf6f8f62cf0b8a9. 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/UKXN22458459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dae8696c117147a9fb9a838c106f64e5a943bd8121ae60b1b30241b081324a. 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/ES61A2427841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb256bc4cd0790bb54c10c3478b326b3de59380e926b9ff92cf27b488f796dbf. 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/GX8KD2471256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6cfee373036ebe7e491d4a3d87a74cfe3be4a024ca26b584c1f36716626b32. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR2X42424028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f257ea30301dae2a2ec48412ae354eda331768e171ef66d82a60bf61aacdec. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBMA22335131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46a330bd7a4cbef2b0129fe377b401f24f3405cb17c8ebe20ea9e834f485ae9. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GB8KE2323823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806066fe5e0311b0b5d6ee47774fd95c1a11f94135419c36c8ab6c68edd9a474. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBLFP2308640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94276c63f74ea831e50314161f2600ee7e2a043d70b2648c3e04aaa232ea945. 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/CH7812346285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ae70917cdd9a4bd83ee5baff3956bdb50c3a2d209e44fe41c1fffa5c0fc2c9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/UKYSF2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ee69c51063b17b21d829fb186741c4fd96624f7c54ac1d12843dd931de467. 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/GX3Q92339975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2129a35d9744e96303c9e7cd69707dc54f3003ca4ae6ad4dfee1ffbcbbd86d5d. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/GBLFP2251829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2774d85910aa5b6131095321fc31448a6e1dbea9a8644eeefd4d0434ca4d71dc. 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/GB8KE2200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0574ed3bc0c2751be751ef71a1f8d4cc9305d042c541b2a50d1dfa5c1d2730e. 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/NL2QC2100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d715ffe7db65d82f8faccde4767d33a4b59410a9693f24ebc0670f4d06b3433. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GX3Q92160543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cb7281f2ad071b804401dc9477c929c5b1b81d8c4aba6c6c944f75f75e8365. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/GX3Q92137773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39983af87ab7ec57ca3cdeac9047c98bbdf01b877a08b7cc900e2bb8951dd42a. 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/GBMA22151115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b618d6c7e6a121fb9b101acc5f1249f9f5a868287c520a5bb13a8be7fb531b0. 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/UKXN21966836.