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 0xfb26c87520dbe933ef24799e05b92b7844cc65a7d21fcd27800bdb7eb12f0ff6. 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/e9280c08-190d-439a-9cc4-4cac1968039c.json and https://artists.proofprofile.net/proofs/artist/e9280c08-190d-439a-9cc4-4cac1968039c.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 0x6d457551b80bd97b7bd57a598d8a60837d101755c8ea0247da53198ee6714bfa. 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/UKU932253072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc94e9392ae0ebbf5517bf8de7298b322e170500d07998e18f97657a18148e9. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/RUA1D2261907.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9012e021354be7b1aa5750edf1211b79b70275e18c2e6de7cd9a261692283e. 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/RUA1D2326716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1351da49f50643a01c1af114b60f1aa9e9e1a74e96af2c8895c58e234fa46cfd. 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/RUA1D2336577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f4ddca3bd1d570b07fe47c822a6e4a5ac680efa61e68c561a88f67f92866f7. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/RUA1D2353543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91772354497b9fc93b51a9475731997b8d504a82281138279f149a9cb45e3cf2. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/RUA1D2353544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd22435c5499e2bf7f7c4727e0d31bc3376f0936ba3829c49dd3a17aa336f4f8. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/RUAGT2348470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d8a0a6a011d1678fde25d69d5a3b392d058de2e4084206d0c82bfb97da4ce4. 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/RUA1D2428680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc468340a6d43d64a2dd891ead8f423105ae85ce39a5cb699c254b292f2b58dd. 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/RUA1D2428681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b656a06dac67d619508efb4f0f45396e4c8515e44fae10140c49a1e554801d3. 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/RUAGT2467390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a7b3a6f5d96754c0189972215fdc06362eb9af010fbf4c1e8a22cee8fc6a5b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUAH62414455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7bcb077d623ef1ef7ab473ea423e43245ef67396f705c10826bf24c0c3e7b1. 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/RUAH62432257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005cd4f4bdcd34a7e85969a7064ff2990b64917ca6382c69bfdd19aa61aa2af3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/RUA1D2592513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa675eaeb59049891dfa8e0415e4b7bd89eb73c290d87977216a5d72a41e635. 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/RUAGT2541968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef5076379091632a69dd3a31429e311538ecb599870b9f7482d1065b87e1f3c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUAGT2558209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5837da9a5d9e47f76ab8ec2213915fb1cc8044cf135d863368094ff516c85a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUAGT2589878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e83c9b27bbae565806982f6b084a0088729e9bbedec25623e833c9c81ad00b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/RUAH62513672.