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 0x56527458c586f63b20b7358c92ff33365ddc6a0da401e76b8095a92dab0f9da9. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d1aabcd-08d6-4d2c-8d09-4ce16406c068.json and https://artists.proofprofile.net/proofs/artist/3d1aabcd-08d6-4d2c-8d09-4ce16406c068.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 0x8bbdccdb8e371711fd3f96307cea0ceebc74875c159f0065a1a4b3946ba801ca. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZHNC2527657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f4eede2460156770993b5cf4a69a62a066a3d1accf379c220669bc5ab73c46. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZK6P2500852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9b65670c02c3e756a9af2de9ce7f11ac18b70a246b62ed4ca036e0af5eac33. 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/QZK6N2532823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6618716066eefcb168004c98d22fd92d36985548ecdc981c5041dcfde38984. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZK6M2580686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9877375de62b8f450110fdd643a9bdf85c9b5c9444108f148c4c335af345a6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZK6K2564266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e13c133863c21fb767870a9ad76373b12514e830eea46f435d45c5cbc384ba. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6H2547582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bee65160bd6604fde5f85cfdd31e80c931fb1d731e08ca7185002ff9ddbe270. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:34Z), 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/QZK6F2518743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7808d300e95a0261db3e032c1a92c59dd542b738fbdee28c9ffb5b887c01ea. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEN2504987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53193cf6f71ac464185904474d8d9fee34b652f3bd629c3ba9554f7e6a34300e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:37:00Z), 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/QZTAZ2584599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587627c83be8032107d352b46e122fda8c70b3fe4cc7cc9edc5b4967bd6c782c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTB42516001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64758dc71a67570a8fe2f2db06b3634bfa385d23555d0928e3ed55ff19588038. 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/QZTB62577007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcca5f24980633ad5125365f227a8b21c5bda4716eef32fcc5583e4db80ba6f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBB2524619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c684dabdc00772bd09c223f034a38264bc343413a2161211e2c31fe6d164173. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:49Z), 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/QZTBD2564961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63d7df402f18f1f6e50acb53784e5efaf17438352e68617f4211bf02352d4db. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:30:19Z), 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/QZTBF2542339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a30df6c9d83fecb895b2046743b6c3a5e8f988cf48b0974d769fe3de4dc5b37. 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/QZWFG2512966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ccbad6e19588e87faaec219e9eb2cf7aef27e5dedea17397d41b4bfb1c49ff. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7V2558628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bec3e7df21c681014ab27f95818b2e1086719f07d7d931c2238c44a78a7dca. 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/QT3F32524196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bae3eb1bdf43fba2b30338212b1bcf972c91b00e21c658d8ea8deae91984a7. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3FF2542674.