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 0xf04fcab4fb854810de82ec95acf2ac672241c7bbd5a2ebc6d891eb9980728cd4. 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/5f54510a-44e3-45ef-8b91-e8b56db287e3.json and https://artists.proofprofile.net/proofs/artist/5f54510a-44e3-45ef-8b91-e8b56db287e3.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 0x940c54ab0e3f2cebe3a7b9b8e73f67f31b04c28c5cea97bc2bb19aab7852a705. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCACL1682038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2994900772eb464d7b2b8d288bd2096e3d20d5bb9902161ab0978995578b3f. 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/QM42K2155093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf6a3c84bcb438158e0668bacdcb4ff3e5313fce97ec862b7bce28e840a76f6. 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/DEVF11700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62a5bcd95f281e3835ed701cff05623fdd05d4d5866167459eb5085229744b9. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DEVF11700122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad4b8f1fd12cd930d66982c3fd3f4b19e3e3ead340f404671e9ace7696463d9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBKPL1897215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a67ef190bfe5e3e8f8af5c3206049ef48711945d41ed4ed426b25a6530a6f8. 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/GBKPL2018015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44005ce36928162021f49dbc7875313f3a8ed00e60a32dfedff706611c0b44ec. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLRD51632630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b633302e3830e55aabebb30bf4f2d36dce3faa72502be211cd7d8ef9518cab1. 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/NLRD51632804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0556129273f467a6efdbd59f2169f6b08c6e17f3c07a6c8e7a428080a032ceb9. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/NLRD51632909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce679c31b7a7a26e6284c8fce930ce3e81b789aa3ca82328a63d9973b2fe7ec8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLRD51632914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6533b91cb7cd537fcf68b009e342fe1d2bdf112c0a6ae344ded3046cfa30fef6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:13:37Z), 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/NLRD51632927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f939556aae13fb002dbb1d976de1d1e04133b1e0fd2f67b5890541080fba5ae. 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/NLRD51632928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aac669f659539fb8568fd9d48a107952061369e761f4c9ea1e97aac04825d84. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NLRD51632930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72ae2f42a34203500778e1dc871e97188990e4e31f89195601ebacef41ff2e5. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLRD51632929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96740c2f5802cf0c9d78eb6cd1aed787c3e3ab82faeca6c7f08cd57d81bdd6c3. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZS642208666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e621570757351b11e0cbd40aaff55c4a08ca8ab4118c721934e33511831b13. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM4TX2431028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95ca99d58b8f14a9f1d5b7c87c9dd6525c85923c135671f7327fb1f8bd3f25c. 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/QZ8QY2100036.