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 0x207c99a330783f09e980eb880d5f895e1316d9cf2088888cde0f9e5f474ee232. 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/f9d23ffa-79dd-4f57-b73b-68efe2fc8937.json and https://artists.proofprofile.net/proofs/artist/f9d23ffa-79dd-4f57-b73b-68efe2fc8937.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 0x7478ee611093d1d5f7ca92e6c42d1772d22f27f7a1fcfab67a54004d02d39ebc. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/RUAGT2471625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec2123629e7dacc8df7263adf9fd24f38a2861241706dce3ebc93411fd97390. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/SMRUS0067201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef07fed83ff71c043b849b8d47a6b11fde8d208387d60c922797d3f4379a6903. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/SMRUS0070034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5737db84db400737b6e23b12e463c360ac9d6c3ca99cc03a2e8a877c4a989f7c. 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/SMRUS0072559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcbf0758cfe3c18e5d329c21e6c74b4d85973859b7721029a0b4f955cdc8ea0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/SMRUS0072844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af6d99375bd68f389c89d33eb2711c02cd24a830b8039c857f2ac6de2acfa57. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SMRUS0072845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f7257ed10d52bf8c3a009c317ce2a4e399df1301f5e20d06c7af9793810858. 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/SMRUS0072846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5737db84db400737b6e23b12e463c360ac9d6c3ca99cc03a2e8a877c4a989f7c. 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/SMRUS0072559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3091dd1ffa012fb39e41b1b1cbca1e201c4e4524c1c04d2630195d66913ff142. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SMRUS0072848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd931ec4a3e57fb8aedb1bd2991acd397a2aef2fbcdd785405597f7b8ca0b2d57. 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/SMRUS0072849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fad682723e90ec2c98d5aff19c201f20cd0d742aedad14126d0307392a1a7ea. 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/SMRUS0072850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ab0812b40b5c6d7e8766351ec121d47881a3bebcec8d78fe3ffe40fd719d67. 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/SMRUS0072851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2692dbe2787c76f9415e1c82f1e8674296d92d0a6b4d268ea9b2b330600ced. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SMRUS0073394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737a2762ef1b6794baefd0e2a3ca41ae2a650b933bdd5a90799bfbb9f68ebcc8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/SMRUS0073956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d5fa5ba188fcdc5420c2fc5434493ba2beff3a5daa4989000d4dd96b0ad35b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/RUA1D2359638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9295bbd07ceea69718c45e785ed7222c4d7c0033360eb61acbc20a799c37eda. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/RUA1D2359640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657d7dccae2d6aef9e4c68da7407a71d9e0b898fa5498b98870d279b3b83dbb0. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/RUA1D2359642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0d23ecc1e8fbd22644be83cbf9eefac0f9b5a3aae27b7c3dc45b97895655a1. 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/RUA1D2359644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db1830f1833c4a13b41aea7a07909e4c1c37c4b6c22eb5e4d55dd32bd715585. 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/RUA1D2359646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c778ba959e63fddbab72123ba6e29b665ba8a4740d042f88a964671f11c764. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUA1D2359648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf08659c64f70cf78c67f961d51c715c2efb6a98802ed16343d510e40d30e33d. 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/RUA1D2359652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d0f73478879f841fd56e45da86f1d1a9c8938539f1aa6d9d771594e70b2cb5. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/RUA1D2359658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533fc251dec8eebf84343f5bd0702e0c9cbf09d3f5471b4b78b3db1a8f05157d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/SMRUS0075064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa001a347dc9ce1e261f0e472d98312420a7a6dbf1899daf02c071e22de72674d. 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/RUA1D2376717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f8f645580914f88a559c38882e17d0b0a10e3746d7141073d4ee205ef05d09. 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/SMRUS0075271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b9fa6b90cc22fcbcd86d99a81d8a673d6fbc9bd10d406ff28594470eed413d. 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/RUAGT2340543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884b01a31a6a4e77a2e747984a1246a69bf92a1bb3c9811801c962f4c3a90b45. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUAGT2356264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce8dd6dde82817f8af4602d8f85743b8b110f35e741cae3a3e30e21f0c99fa. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/RUA1D2402116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae699c132be477804daa9d0c94a139f8ca3fe7aad585e09eb722b27fbcaf37b. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/RUAGT2404153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1296008b7d16970aff78e03161bc8b6076793ea52b259e473ffdffc0de3e4fad. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUAGT2443344.