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 0xabe8adf76858934d7016439d40cff232c68cd7f1da39f45cbe4ef823f06b386a. 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/fbaa0a2d-7b98-4776-a240-1da3cc9b7fc8.json and https://artists.proofprofile.net/proofs/artist/fbaa0a2d-7b98-4776-a240-1da3cc9b7fc8.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 0xf679955de24b16458df4ed21c2cdb0dd1a1eb77fb0e197002c06919ea419d650. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZFYZ1914317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fff72715d4855c446c5ae7e465ffcbd275ed0dfe239bd6f46923189089bc5ca. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:52:47Z), 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/QZFYZ1914318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab96fa062729367f606aa22c6f2f18ee0bc590e58f37621e1af3afe23a631ab1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYZ1914319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a94034804cca28dadb4d8b78ba1367dfa776dc163f4bd87aa9dacaed1b9dd68. 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/QZFYZ1914320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c617d996d2435582884f4ac4e663187853391072c1e0c096e14fdb0218b87. 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/QZFYZ1914321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a492933fd66e5fca4978635d008fb6fa67cc77e7aeab3387a3a77533729feca. 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/QZFYZ1914322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731c25fcc218831f07f3085c2f010dfaa97e25d7a93e622185d954bd67ce0f01. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFYZ1914323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb929160ff6e19b393aab41c6846ab22ef3bb5a9a714c70b3e8f1fcdec28be5. 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/QZHN61930767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8be181afec7990d57713a2e409c6e0c019213baf86e2a557cfa0784620bf18e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:37Z), 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/QZFYZ2023887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe679268047623dbb16e9f6fdf9413721c837996cfb373ffd3d26a4d880d1e19e. 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/QZDA52077448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963a6ead860284042a18f33e93174c934d3448f7efe01175c4c4fbce9b135d9b. 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/QZHN82041416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab75204a566b9d5c2572562fed20f25f8b25d42667f502be678ccde68a09652. 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/QZK6K2070280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6005d392fe20e449427191f0226a717043b95ecaa2172203edfd1ad9afdebd4c. 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/QZK6F2003060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba4f35255a7aaef77f1ff583117e0e6ae873388285f2e05dd26919065a2ecb6. 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/QZMEQ2079418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde047ce8fb4043f07814a1ad167f4c059aea55ef671cf77d4f32014386a6c5a5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:56:17Z), 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/QZMEQ2018128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9384b32159ee9140a9d02ae80e639136b027f0dd082d1d2dfaae1be2935861f0. 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/QZMEQ2018130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249e6b71ee3771a6da8e19f083b3fa33eae61db328b13f08708c41879d915ed7. 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/QZMEQ2018132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a520205955b7dc2613049b29e44deb4ee65e842a03fa5b38316ae20d961c8b. 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/QZMEQ2018133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed79b57a20dbd06b261fb411c1ff8d003261732c80637b7060cfdd24de177fa. 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/QZMEQ2018137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6657bb5fe5ed6264427f8279a89252edef65109287cfc4ffb5ed3568ab4ffa9d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZFYW2195378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bee0146e5870243647d5bf14b24eaebf67f0783aa18fdc67e047bd4701de59. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZES82148940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8121645afe293d6e99d2c1200c478770d784d4d440adca5940924fb82ffcba. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:44:27Z), 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/QZNWS2149782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc1a5bfe2040be232a4318bc53c510e4c0cfd83f43fe57ce025ad592bea5d0. 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/QZHN52267670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc8f912dbde9c86c7fd6dc5a14b7c148c989693454d752c841f29eff8cbf9b8. 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/QZK6M2234925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d94977a25f94ea95cc42483c97e9b71e4bf37c9c97c7f458930990ab2d2668. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZK6N2209458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a976ddf7b090759560014c223a6d3988c62fdea377755f3156fa90253100fc. 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/QZPLR2239606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698273d9a01fd34abf3805b621b9fff1252ac5db62fb518028d2014ff0c90382. 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/QZPLR2239608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07a58555ea13bfd3c5b23d7ba5443097e3282f2294d17ef90f93ee02b4a906f. 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/QZFYY2251100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4839e1d27625b8fda4c90144089b8bb1a81221c7fcdef8622727f50d678cdc3f. 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/QZFZ32377682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a96d8dc761390f3b0913f6267670d316bdff7e3fd4dfdffbde14b15a65d9e. 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/QZES72309570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a3197c2f7e3d6ed166d8fbeb2491bacec1fa050490a00f1b3bb7b0b965ca68. 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/QZTAW2359751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ec517b9bb502ec01fb19c6049edb36828ec650ed27ea298bc6936bbac55cf8. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZTAW2359752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcfb479599ee9cc582512b08792dd51d18a8448dea4dd477ffa484ee0a2012c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:50:28Z), 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/QZTAW2359753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b7745b58603f2e49e53a711b8f1c45f2bd558f5e25236a4532abbd794a05b4. 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/QZHN92334306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae263f74252aca736e397a7cef898553d14c3aabf37afac41e1c0fc99f76b6ba. 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/QZTAW2359754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83ddae46d96d08b6270f2b1d3ead5e40e61b695740a94344e7d63bc6431f42. 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/QZMEP2311117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82758e2c7af2e36799522af33337f477bb349cf285fc8948b103875f10f7676. 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/QZDA82327856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c62dd87a9de71c920f984ac6f1abde94f5febe57b99dc3cb9c6edf13af987e. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZK6P2358724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a390c176279b628ecb38b2a0b6a83c846b48307facc63cc399d6030b51d16e. 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/QZES52334084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f77956d587c3e5a8e98d51590847c29c7945cd1c709a54adaeb2d383b9851. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN62348991.