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 0x2c6fa70acefa60dc143046b0bb911005891475e14a1c0790411b5e71f7cc14b7. 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/249f4351-074c-4ba9-85e8-35ed9c4c2990.json and https://artists.proofprofile.net/proofs/artist/249f4351-074c-4ba9-85e8-35ed9c4c2990.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 0xaa292d2e3953c239063104ce4e397e4ea50d71d8287233e7221233602c24b533. 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/AEA2M2113898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4752e68e441ecad867675e8cd13c51562a9831eb37183ce75ee7dbf2233865f0. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/RUA1H2230833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf3de96b46e8009c423a9dc26a2fa9cfaaee3c3907544c4044d874b931ea04a. 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/UKU932284262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e193c6d241df47ee72f53221b539d2ae790b4470cd20601e0dde498a97023b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UKR6V2251665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89049f007827eb40349a7c0c99cd294fe3023d7483c8bce6d60e9516e105effc. 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/UKR6V2330949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb30aef901315b6dc145dafc320695748bc699570b7a25f5b4f17ac78d170ce3. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/UKR6V2336002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e29ffdd4818f541ca456455cadf99202f56905762720ee3a8dc1acd84d9e1c9. 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/UKU932343981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229721114bce0c56b6eab55cda32a6f4f1ba3e0c7f9825c7397fdd70e7a8baaf. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UKU932343982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc864e8bd8c0308b5a5ff2ef8482da55f70cd6e188024ac659c4792d084140569. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/UKU932347791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98bb33d14fd52ca0f949fe1e3b795bfeb8e806503f9329bf089c0901e2857e3. 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/UKU932347811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b97d2114387986f44057a1c56d4bd7b97b688704b928fe07e377a022b6dfcbc. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/UKU932310716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e73703595f772fc25239320cf2dc322166b24d073ae085b55b5d86ce5726a3. 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/UKU932310717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcce3185e4e95ea2f1771c67e0318eb90d225ef1068998e7ef3ca8b58bae0e7. 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/UKU932310282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae3ce1c371bc450843079a6916d9d79fc035f06df21a0766e222f27965e5768. 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/UKR623320475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb7674da4bd42e87c6cbbf28e495baf634b0730b74b8e7092aaff5e694127b2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/UKR6V2303097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66646458b83e295be4d743679f165f49c266623e9b7ddcfcb2ccc3e7c7360623. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QMFMF2324042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626d47fc5dc770a5c7da5f9422d0e00760b96f18fc06acbe4029987e8b0138bb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFMG2305747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab8a28b647caf0dc7c6a0b503b07f4f46159635d9be5ace738b52fed7773d3f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QMFMG2305748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d966b59f5ea738cd9d4d576a981f64bcfe8eb20bf8d5ffa3fea1237e9f7c1ea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFMG2338003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6910bb41039324fa7830cb6499cef5da312321d7f96550a1a4169f2d6bbb991. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMFMG2338004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d264e29c6b94abf33f8f14d2d4b318a6c5b668ff2666219ff791bae39526b1b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFMG2338005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a67e6f3fd44bd1ef34da942609ace55d95fa862d84c15fb4cd97fcda94336b6. 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/QM6MZ2489199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069c2e4f0dfd3b16cc922c517f11902b05cc570eac3e6ef2e92a0113a506ebea. 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/QM6N22485073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889602373c2cf4d561d060640de557de54215e40f582d789c6bf0ec516e7d0d1. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/QMBZ92405534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fff8604512df750f7597225cbcb9e9c126981e37ee5e310b722cadf4d376dbd. 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/QMFME2407715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07f4ac20828da911fe7ec9f9c91d4b8822b03839ad0242ee8d1178641b1ea19. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QMFME2485630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec98817a50efe49ce0be3bf7a7b4128fc2f85fc1a07cc0d1d19ccdd58b739e29. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QM4TW2562236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cea5cb590479dad5439d5a44bf1b13b09823cf87949ffec7a0816540f5f36e. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QM4TW2537563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8f0ea562d5aeccf0132e7d7710695b9f66d18ae1d77424877df7647c0c6ab2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QM4TX2597367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf95bc6dba357deb1d3d5a967595805bfe3ade41443544b2db6b0f4ea8914b3. 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/QM6P42531372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e48f3fad796fec2061d2154dc9f92dd77d0c91a450ece46c791e75e2964fb8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QM7282555638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c8e83e33d80bfdbeefdd371ca6538511fce8252a2486e0bd3ee7a8cfa8b754. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMDA62516560.