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 0x5d710c2b76e775534beace05a88680d7652ab5b86cea2da657df7daedb859103. 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/a31ba071-79d9-4fb7-ad3b-211fb79daa4c.json and https://artists.proofprofile.net/proofs/artist/a31ba071-79d9-4fb7-ad3b-211fb79daa4c.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 0xc82593fd0b9d09b780bcc453936fae5461e1469e65072efc14354decf86cc842. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/FR6V81154533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc9878d9c0d1068f0f7b758cb5572231fcc00dfc89801e6bf719002bd95e8a1. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/FR6V81154534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b48589d4b6f82eae2eae385fb52febaf867279f901efce7fed5ba342ef78f43. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6V81154535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9861758c9df96e18041b10a6909f9ec6361bbd98b5a8856ff9b77b0c543e9731. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/FR6V81154537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b84f042f7986afafe17ff11886671038b1b187f0c5a1ccec366eaf81039ef1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR6V81154538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b2e9b339911ae7a0579a4cfa3ecd1b39e75bdeb593d4bd266069fabe221428. 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/FR6V81154539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ec87b494463e9207b4c231257daf0bdc26190ab17fc18297a72afad5fd9337. 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/FR6V81154545.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6110acafb25feb8c286c9c6e63155d7efde306aff231cf80f98115c2a6a9e18. 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/FR6V80339154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff408ec27cf473af360f8fdb534930be9d8d3429361816e30926358c2bc49084. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR6V80339188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff80c87d6270ac43dce1931789506913d03442e8b1d1d3ba826c871429c3d0ae. 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/FR6V81690924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6862f2b10204298151fb12b26b33fd287315a4971ec7eee40d72c2c36308a41d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/FR6V81690932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05f82169f0871e7f3241b6664f8fc3b03f1a2a130c2cd18be8f3848cebe058a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR6V81690937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e47e073381b1394fbed4886a20cc55cf62911268ac41f163fdd996c9a47a008. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/FR6V81690939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccbcff8644b9638b4b830940b34391556f4ab4db4fe0590ad8a7779d88fbfc0. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FR6V81690949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42dc45153d874b33ad819f1078c94d9efbdf9f5fe41027c929d359b987884c1d. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR6V81690954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14811e0d3edeae3248444a4d1b479ff2c6422766575a026724d7eec35886afd. 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/FR6V81994936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28b3c2050ae271e87e1a43c244badbfe3fb7d47d88fd5e98df296ab049ecfac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR6V81994845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2efa5f432e003acddcce7753e357f3a93988a0e88e4b31e8841e632c6dc32f0. 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/FR6V81104752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd006a6cf072b935cbe051270609e95e6cd3fd2a56019024bcfeb3b5b36ca1af6. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/FR6V80448268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828e510181c9360779a53fa7590cbd3fed4a018fb09bac6482a25c7e6124dd65. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR6V81694870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978fc7c28d7029c7cc6d42c05cc32488b6a43f42742a50bf9ca904f2335aa9c8. 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/IT8TZ1576303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d48ecaed79f833665889069adbd7d258d25f2d4492d2011c29a622ea4bd765d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/IT8TZ1576305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7471f0160dc2586f0495139cc6b6538a66f77d5ff012c46ef3b8d3ec79bd092. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/IT8TZ1576310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cab72492156e8638a8cb669d036cf144b100c82d0bf7abdfe58df05f1be6f8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR96X1637243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4183ad69d6255992b07e020b2cb6496ce4d5ed043cdbd6d36503c447e8e643f. 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/IT8TZ9848002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb405360e476abbcf36f71eaee698425e23042e5d3aeef1057cb924857eb11893. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITR632200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6349964e699d1dfea3a20072837334542dd1bd48e492bcbb0e7e55824e82aa6a. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/ITR632500759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6b8a487f4b01b02bb3fae471f674c81c47b94b78232db5f4996be9a494dba2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITR632502002.