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 0xac276c42e82b21aaf6d9a8afdb7d15c16df2888d7efb767a6da345a6b4dd466c. 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/6b0d2d34-45cb-4b9d-b08e-f6c8f32e27fb.json and https://artists.proofprofile.net/proofs/artist/6b0d2d34-45cb-4b9d-b08e-f6c8f32e27fb.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 0x577b2c1c9f1b55f4f77dd143a17328b5bd2b291d4ff6f6eae9c576eca28c2b37. 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/FRX872342995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f979d2e3cb432e622be7c1e9d3a16533461549afacf1f8e3abc83fbd90f6ad7. 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/FRX872342997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec7661fc2918e96f8d39d795b5afe6b1e06a99f50dd57eba446a3d8cab1d9da. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX872342998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d382bd7c4ca573bb2699715d8c61ad7fb1ddea82ea225efe77f569e65ba72f5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAU2136182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7786f00f8fe30cd6b1bd117ea23b36cb6d3634e969d0e74a04ee6d5263cb562f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX872342999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ff022831aaa7b687283ce33d8d8c06eb5575a629c264cca8ba2428f9e0335f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX872343000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44d768efdc25e168c8276966875539f0837a56bd1b7ad84f403e02416cf77f1. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/FRX872343001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a550345b375b8ec4457731fb0906dca927f1bd21c5181fc9d27e05230902a9c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FRX872343002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e1792899146d761ba7aa52a40e9226173a405124a9a3e1ad7555e1211abd41. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA072512739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39af98da2a563e9703746eb65d50e4c4ddeae2f168851723695ec5ab8d7540b. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/DGA062595980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082401040117e7a2532d073702bb9bd84dab5553ddd54547d0c30d719c05654c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DGA072512740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd8d122410bda9abdea59359922cb894ea9e5bd40a822bbc22053ce5ff55678. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DGA052537152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c58bff386914d70087e9264a4e4232e089e12888f877f9660ecb0fa471871a. 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/DGA072512741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623d2b116d50a33c1fc7bbe902607cfc35a86fcd5998ea371bae007adfaad380. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DGA072512742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9b66b080716facd3d6187c6d3fff8765a9efd5f3e8cf57355f6d1a4d51dce3. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/DGA072512743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831779fe2275166b9e8fdbb8fa5118a793c6a54f26c3b1195593ebb296a027ca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA072512744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c72b33c3b53a473e2d226ffa39fe33340645dd5289361dc372ea49c0f6753aa. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DGA072512745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecbbf2a68a77d8fae795d4816093f402686530dcfedcb9fb495b25a7517fb4c. 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/HUA612300779.