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 0x152351c74d9d035cb2c947d5264b8f7bad7e18e0291694badb3fafaaf701a231. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8c4e766-ee87-46cd-8e5a-996d98d043bd.json and https://artists.proofprofile.net/proofs/artist/a8c4e766-ee87-46cd-8e5a-996d98d043bd.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 0x52a0ab33a804ea59855bb3a23bbbf7e5178a13907714c118ebfb9716d9c013ea. 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/QT3EY2411660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255ce8d3f426f2e583d085ed663e2eda8e13e3cc0bdc0766bd5b4a86296973d7. 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/QZFYY2572170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251e0fefe99881599fcb07bc95cfec03988beb12cf4087854d7c8875ae1227ca. 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/QZFZ32525890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb648ca16b5bc978e6be2626a54fac457ab80284076df61adbbffebba99fb66f4. 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/QZFZ72515694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6051e9cb921622f7a7f81657d2ea42f9aa798d15cfbe654c10d54996bab7af55. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:31:26Z), 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/QZDA52572015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea804ddae002a2854ae66cfc6729f74d029ce4e5d1e06b158d92ad91b1961ed. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZDA82518428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f76dc34a691031c1ac270144df5aea8bd53897b5901fce916aa60ffb89a85e1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES72519615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ae447f505577b8dd41025660a34855449195339f6e476770383c668c266990. 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/QZES92593476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b07578f6983300ad507863cfa7ab1dbe6a30b87496e80862ab1510b338c776c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN52578820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42961bc23347ec7555f1d370a5aea4d02a6552a9dfae8b57007ae60c5d693e1e. 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/QZK6J2501103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8339267027deebf6480dc3c2230a91aa2cda261c5b7235c0baf003c228caf230. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:47Z), 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/QZNWV2551001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795af5aca48d5fb625c009ff0fc67ff6b1787192b1cc6ebf44b7a2ec7f110579. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWY2512915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde08a9d598731dc62ad729ba33612adec09b0bf391fc4b55875538ce7081dc60. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZPLS2561767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f382a392f78b7007a837dc842f437cd71ee9ea7cd5549365d9821d278c04ab. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:55Z), 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/QZTAS2565049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3857340d310f9d446daf2f58366920a0f06d3aa0839f8538c5f319505572ecf5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:39:03Z), 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/QZTB22533624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcc46de7896c2a05b0bc582125c7774034527d15e29ee37fd95dbb14b1738ba. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:26:55Z), 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/QZZ7T2539206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6429617cf6c1349cf6003dacae71b98eba795f8b78c1d388a7ca8514d49589a. 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/QZZ7X2525526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3b3df3ef0e262c5e3e26451a129b293de4a3d0f986d9caae115f0e60bf8a3f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:58Z), 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/QT3F22510424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f28fc881746193fb3d8c4d3459d8896615dc8d90cb9bdbebf4fd7425625ae9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QT3F62540957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd40e6f352d93b807b1d593ee03e71b6057d6e2bb3ae559f625745bfa2e53d7. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3FB2503033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b192792ab06fba9acf51713f6e20ddc198ba7743dc2441baf95627e47b58cd7. 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/QT6E62552371.