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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42c04db4484418578c419a2573dcb464a5528ee2cfd8040889a2b8a6cd55b23. 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/569b63e2-1c67-41b5-acd1-9001e9787e77.json and https://artists.proofprofile.net/proofs/artist/569b63e2-1c67-41b5-acd1-9001e9787e77.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8aa259ab405dd1ea19c717f31542423900d05f78f651cba59a8f4e8fe272853. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ATAT72204001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89fe2bb947d271b2b0aee739b6a8f11d0d91f99e6995b42de5a957beac260ea. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ATAT72204003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee2196a2dc7e243d62d567e0372247b9c46e34cbdad7161286734f2849ad3c3. 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/ATAT72204005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8094ca06cd52fce7d9908cb439c4984ac788e1ffb739689d1880bcec5e7a2eff. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ATAT72204013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa840430422d38cbb34da2a3f686079e18b4e16e952fe12367a1a18a6c14680a5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ATAT72204019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b5f555d3aead06cbd2daf24fb61ada25db20cfbbd621618b8f9fa4a101f26e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ATAT72204035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5121b5a12bbb0c33615abf8911fb4f295e231955032b177e4b781867220f05b2. 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/ATAT72204041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7a94e5a1825a6ceb1e6bfd64e530627a71ecec7f05344e4de86c391b6cf636. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/ATAT72204043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc859041910ff34bfc17dc3de1fc30c2e0090f496ffb35e897831b452bf3b2e48. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ATAT72204047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c9990a94185ea8a18b9bf85e8fda0a152b6b40b27abb0d0bd6d0806692f757. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ATAT72204049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104b4fa45d08dc14e90f3da7dcfb57c2ccacb22fd31deab586e40abbfe0c56d0. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ATAT72204051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b126925dfa02ca8546958505f87f0f5f0b95eb642b4d33ab6c125ce029e425. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ATAT72204081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b415fdb05268197cf533ff2e887fe74065ba7d1c745b13eac07718e85e6bc12. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATAT72204089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9d709db9fca1797b8b900a920f17d79a4d1a68259ff372910110d470100538. 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/ATAT72204091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8936c6bc14ab91d56b90e66b27b7590ab4b59964e36ae1a080f710928986de36. 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/ATAT72304027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf0bd417bd459c44e814a6912992da5c3f33807a624ca48739e8d8210f40169. 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/ATAT72304011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7407178657f5c81a50a7045c0ae042dd0195e7ec2f1b2d08bc85b0577edc1e7d. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/ATAT72204099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4677d2b270a8809859c4aff852c5cb9ede567a7fdbdc40096455e6d886262f4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ATAT72304001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac843236e16cbe40ac1c22684260d87fe4868ea3cb12bc8b1e2d0df169b39b3c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ATAT72204069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5121b5a12bbb0c33615abf8911fb4f295e231955032b177e4b781867220f05b2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ATAT72204041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09584f8434cfbccabfad3594e87b71576934c45c64f5ffa58ccb6a4582130dd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ATAT72204007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740892b9a476d7f711920ab9ccade0389995d56eb9d044a02d7f2594c07a0af9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ATAT72204079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531092b0a15323a4e12490db40eaa265ecd679172d9dc940628e4cc36d7f66d8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ATAT72204075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24b15e231c082f1db0e38d4a9df9791d375df868e18b28acd2e10256644ce4a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ATAT72304033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c44f1546ace00463ac631a942a88bcfd4d8f993d76fd4ec09b12513b0dba2f. 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/ATAT72304013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd234ea2460d5ebd3b7e4013984432ca11a4a2cd86c05bceb3a8e860ebd109e2c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ATAT72304039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c5caec1d82a9528bfa087fb24ded5d8f22ff196df2837ba614a52313cd916e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATAT72404003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15c7933823cc0ff95dc529d69933c2538733c9303c710c8a2e764158a796337. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ATAT72504003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4322cccbeb9fa03a3844563ffbbb23c46ab6d55dfa434a853161e565986edce6. 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/ATAT72504005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81959cfc5a03936874d26fe117bce59db85d0dc7abae81795e8994df66491321. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/ATAT72504009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0008a543187737ac37b29b8154fd79beddf58d7c15294fc9263e41a5ff99ccca. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ATAT72504025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d66727f64142fa2c410a3973a0574f80fe1fbc4159bae02724771a85139f1df. 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/ATAT72504021.