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 0x242b96ca0f15e4b94daf7006fffe23ce63ba0a9f2589c1fedcb08c7b769a2a6d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4d8f6df-f87f-43aa-ac7c-b581a900f1c3.json and https://artists.proofprofile.net/proofs/artist/a4d8f6df-f87f-43aa-ac7c-b581a900f1c3.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 0x879341e89629b1437c6a6b2ac825571fd4b99209d3ff018308eb320928d000a0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLH791300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2ae616b26ad8497a8e15ffb5c32a87ecc56fd0cc34a41da0917ac18bf1725. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/PLH791300398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584e2d033761eb7cba48f21bdff059b73fe8190570bfe4ea4dc908918b216ddf. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:24:17Z), 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/PLH791300477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5661fdef7ffa2ed5f738175fa818fdc4ccad76cc3aff8378fc972c5480ee037f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/PLH791400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee1ad3fc26b7867a59b9b118ca45d055b5cb42de20e58262ea101013c0dc7fa. 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/PLH791400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843addcaa4475caca66e089d5f3621edd11a1cb3b53eba92931b6a6e8924778a. 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/PLO381500538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d81062ef3812eeed6603b827177ee3b1fd8bcf42033acaa98ac70c05764be2. 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/PLO381501371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a28213b7bd4d51135d09975888aff352a9d1f2abd354523210687b730c6324f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/PLO381501373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227859a6bc5f38afb2d1cc307a0c95c4f9e59126093ced4c6181c7ce91afaae4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLO381501374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa7116ce6f0ebb7da095f86a5448a0c4fe080f611f882de30e67c28d6d601cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLO381501621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07c8b27d331f95ace7a85a2078df960b401aacb0ac060694b0bdfde71b0136c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/PLC691700085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82bd84cb9c36112673ea40a7954a8dcbf6e018990c27ebd14851f5b081e7a3b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/PLC691800074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b21de4304ad09b3e3f8d34068780f7579cf8f1d57e286a0174a1e6aadb891ee. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:03Z), 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/PLC691800199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9d6b16c574ef089abd0ac7748c9c4fabb818495402e2a634ac4ffc10757c91. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/PLC691900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9874afc79dce9d7593b821d6396a1b8919c3891585c47dd3d618a7cd5c4fd3c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PLC691900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9d2976f9db2df27b41f178ecba45688d6a760db89fc57cec4510c608b737c3. 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/PLC692200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb64ca9a0161d4a7e5da0dee93efa79f2bf2aa76c3ba125d65e663a9e11742c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLC692300039.