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 0xdb03f8bff7aace9f7ec9319281d87e74af1be1e599d4c69fd14800fb8f28067d. 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/cf37af52-b652-40b2-87d6-6f2394ad2cc7.json and https://artists.proofprofile.net/proofs/artist/cf37af52-b652-40b2-87d6-6f2394ad2cc7.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 0xc8b0b27b79a742568419e21eb79ab7bf8ca7ba42bf7b638e8cd3d8dc8a518943. 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/QZMEN2482214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94bd29566c778b5a0411770673b905459de6da6bd9a270cd3e6a2f9bc762011. 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/QZMEN2468828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f174f9d2ce2c5bce086e887d37ded21aa765f8ab7858cade38643be0102933. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZMEN2490483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b704949e13559b4aacd6a409332bf6486d7900affd981d65e85c0fd638a81e. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZMEQ2412338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6f48fcf17c293e798383984ce08225d06cc32db894017297ed3bf4f710b911. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZMEQ2414664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2f572201e795f8db003d1b5b731f12dbff86aea69bdcc865ab9804d8293214. 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/QZNWQ2408796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586617aa4a9ca7cb9a6cc5813bc06c0dcf70ae20301cb1bd2a081ef94898a239. 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/QZNWQ2407446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f7ca8252a7a54e6a7ff05cbb901d9fe3d9f88785b939e6876f89a19919a76e. 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/QZNWQ2408141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2077e07ea3af243180cdab6215fc9952ed56159ddc44f56fef1cdaffa19c75d5. 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/QZNWR2493393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5420751acf548ff063ef92ec703793c6a2f5f3289dc3a9559fef0a523fca87a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZNWS2435019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1705d2e264fd7b7a8452ce319f39538445be89e0777e82fc7f1b9c6d3fe814. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZNWT2403749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb222152c52628ce5586cca61ca1c56cc73ad8eba0cdac93e9f7dd28b740513e4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNWU2405236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7967bb3e6a6bc88ab2df731faad74cbfafb17ec69f01515e8cf3fa5029af460f. 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/QZNWU2441650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9479ca65cb308afbcd1e19acb39f9ed907ed6a94396280edf374aaf990aff938. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZNWU2486586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5ae0debfc76edf993e416fdcc221d950943e451f0e684c4a227fae64ae3d51. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWV2450959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52444d5505730e2c575a46e08e070c7848f6bceb331e2399cb29836de708bc39. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWW2421106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b94b211bb2f97b5f9533017c942f5f6e9abf37b4f3df9eab2052f53054eb815. 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/QZNWX2441575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceba6c4594a23cbee4e8c6c275fb28952388c4ad35f67518d907667df6c7fa5e. 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/QZNWY2472856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03164df394c4ab0c0beed4bf7c39594f11e44356466601516fb6c7a018779902. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNWZ2423476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d329aec6d30e84e307d36a29a39eece08e06a3cef80468a81cded7116c0e59. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZNWZ2461606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1b6b162432d899f63111e69d43509ed59da02534188a5015d6079527141a74. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWZ2487332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548d57f19f3ab3d4d6223d41df24939c4d83ac0011914d0c70b632c93b34ce46. 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/QZPLR2457957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a195d7a91814437adeba078619d1e60dee6ccc9875d6364d2fd3ae896e6294. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZPLS2482466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3641431ad828e95b330e2f62688acf4ed7c4259c397aaefed05f0e8e539656d0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZRP52426060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7968c94403e9e395cfcbde230f9eb8caebe029a203a635910f42d7bc47b54d1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAS2436438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c402c29ae5b744db29b223170d2a33944109d0c3df90c3e463b8160aa9d30f0. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTB22420081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bf5dbe18f2d859eb2367487f8f960286026614dc1c606c1a443f377ec32f01. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB22418173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b49b6241620de1a0c63ac72a72023abf099c18f0dd864da5fe8484fd30ab41. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7W2413002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd580aa4f657c83087c2952bb98180ba26fb918e57cfca868b71ad874f769ff6d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7W2412997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1323fbd3e7e568005d87ec66ca404d9bb9c58c3fa3efe2ca271bd7a6601b5566. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:11Z), 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/QZZ7W2414844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62122b7ff4c7b2a8ae459f69cedd024a7df0a8af49954294f906b5296fe12eed. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7W2414846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954a89d9f306e7fd67f5ccae6349aaf7a65d44ce8c5915ff11cea269f6671787. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES82595735.