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 0x439e589f54ef83c4491512ec59eb7c1db5d19fe81e2da5d4a5dff0bfc224735a. 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/1bd4f6b6-bdc4-4b20-b925-534af3116fb8.json and https://artists.proofprofile.net/proofs/artist/1bd4f6b6-bdc4-4b20-b925-534af3116fb8.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 0xb00efc53a09f93329f08243d55b94d9eb90d7aa5e7af4a8883524ceee55c76ed. 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/AEA0D1925449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccdb8bfc9ceabbeaddc911a2413b3f22731d79e050b3ffd91339c83c0c3d2ab. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/AEA0D1968444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16c239cec8f1654ce3b43a917add72f55fcddd55d7228740dcde6e52fd39831. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/RUB731594750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3b9dc61546ee89d004720bfd0b4f6735e225e03cc4e4a5151a09a8d0cd647c. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/RUB731594744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe574c0e43568db15157913a7db8650be4e3218b3b24a7b9542431855794af9. 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/RUB731595230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0751c075c8ffb2427b546df7bd05aaec2864b60813419c8807822ce1d042758. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/RUB732000458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6530621aa630a448a9afdfc1e634ee34a1ff55558e6cf5a57da85b4171856b. 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/RUB732000466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bea955b79cda532ad29a76fad2605921300df46e11038e631135d9ea747d98. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/RUB732000472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4f5c8b2fdd0c04287196078f6beb4f4f9fd2bee250e9ab8e1759e5306c06e1. 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/RUB732000468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790e1b93c0954be77ae318194d10bc09dd5fe63bc6164ceb9b4dea5ffaf86081. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUB732005730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2acb885b8bd5ae98b3ed5e9e9ecb80248eebe762c0f1cba12ce85a1bd3fa742. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/RUB731595232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a5c03e3a7c6c7dc9a04040bbcd7cf4148e94db1e49cbefa150528c4f6e3882. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/RUB732015578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cf3024f2af5c85298d3650a473840d47cb7fc57e75e0b9c8de901a52398e98. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/RUB732014281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0f27942703082f2fd24adde61c38bb0bd3d8818689bbc49a96746dd8ffef97. 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/RUB732015588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea245234e830079e77666e840ef96976f189672e8621f5bff861bcb2e9d91ad2. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/RUB732019061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e65d6bd7eec9220371331cc57f0a620a8127ed7840f3181f681c489c9ec1ce. 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/RUB732025267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2b55393b2cabec44efeca2c8941f1c7f9abe916f403a870a9e2a5fa51f6373. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/RUB732032144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd39733ff85e4a4d5b82cd1cacfa3e8a90df141be4b6b861b26fb5718e5135f7. 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/RUB732025976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a84ebb5e9e2c111af22ac94c6e8ce2bb91f3a2782eb8e52a958e37e6abbf7f. 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/RUB732025970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae09d9be917cc664de4defcafa2a1b8713aa276edbb350862414d54f0d63e5a9. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/RUB732025980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba3adaadf51bedc2141295c4c6a03f943966a5f7a3998110cc40b892b7254ec. 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/RUB732032138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4868f39c14d80b8e28edffc145174be2f8fad293baffede6a14fc073aa3781. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUB732032124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce5799a9bf3aa6f86b3f17de824c4ecf3cf13f57e288f079e8f6d66f965eb32. 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/RUB732017364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb991cbc8e7f4a8c060da66b06b7103d201f5f23c17b04bc9c682c663618114. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/RUB732032126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08d0c82c944ad827f330937b0608789326969cfc157c755e9432eb00f082301. 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/RUB732025974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ba76f15065429692395410725ac6958277fba30c0d9b8aa22a426919ac0b90. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/RUB732017366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438563ba96615e55b2c9bb2a82e3430355ab167caeefd34a40822d56b571259f. 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/RUB732025966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6aeb204842c1c69a3b467f03fb506513ed2a9d0885decc4a13821bd6f6cde. 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/RUB732049592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c0f98ae1009b677d111bea855994419ec8a150be8eb5be21195622d614a14a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:12:56Z), 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/RUB732032136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ba06819f71288ae9bf1759d85a6217ae75acb83c50d5255dc1af053f76f41e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:14:49Z), 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/RUB732049582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73ca23f6fe17bb761673f1992a3a104a33da022ebc7b04ccddf25c7f202ce00. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:00:48Z), 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/RUB732066005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02988ee2a82107bfe934ef2b84b890256e40af4bc8307f39444e92e1bc8a254. 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/RUB732049596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5171acab8690967f04ab2aa7785a0606efafae88479bf84a9502507093df5e6f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/RUB732032140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e5b835fde06c56e99051e2bd413d1bee82fc3eb2b8ab046189f3b96733a698. 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/RUB732081139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaea6c471143c778e21f0d3eb1f22f393de213b58044f6b3a6aece345674483b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUB732081141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec92f0ee65dde4c9917e22f2e919ae3affbb9e1a7d8f7ab95e4800ea8f3b8e1f. 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/RUB732081147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2685125c7ac43dd6da971318c1620eb72e81ac6914688c1c5d0a0663237291cc. 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/RUB732081151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ebef87c5935379f62abec74d18132863baff5e76e89925ccc88f13f9d03a5b. 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/RUB732081157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c52d1d117600533f1cf0fa5cdc9b1f8215a6dbb54c91d20694b1f6ce49ed072. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/RUB732502378.