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 0xf527f358d8fb7ea782bde6abcf03515d8333296b183d092154bdbe878003da39. 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/a86afded-518e-4ed2-aa5d-86cfaa2de5d4.json and https://artists.proofprofile.net/proofs/artist/a86afded-518e-4ed2-aa5d-86cfaa2de5d4.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 0x57b9e53c8a7c85748068b1dc5ac1cdc7577e8bca68aa6242bb2f4e5841fcf379. 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/USCGH1793744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ba000d644889e017035349cd8aeaae1ec26aefe51bc6a066be2ab1271a588a. 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/USCGH1793745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55faf911e7bcf966670797cfb6fde10276591e1170adb829395d5d27772ac371. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USCGH1793746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cc3c3a3c23fc7068e0d622d5c7d3c58a44d26e242dc5737a8c640897a77ab5. 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/USCGH1793747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e066c3dc96b60086ef9f977d61ea962adcf06d1553f2b5e7a7cc64d11234df4. 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/USCGH1793748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2af0df0cb8b49fe7ce51f5ef065b11e85e5d08bf5f601222e94b4851acac8c6. 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/USCGH1793749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a948733c1057ee65056664b85e477c62195641d356667fcead8e2b2db1d467. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USDY41719443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31672859690695d68a04f54d08563d9add6f19e14b27cdc1c0f20eeb104c704. 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/USDY41719444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0739a8db9ced58d105c2ab4f6bab7e08f82b0a93085b0c6a6cc8570cddf8a99. 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/USDY41719447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3911184b863048381768c73c1785cc75ca9eab245e8514985d3fc6cab2ad5149. 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/USDY41719448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0cae379130f83f76c610bec87ff08fd0a089bbb16ad42e4f8a83389c047260. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USDY41719449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c956caef957c868e726caa6448ddd03969eaa293ccddfeda821942c48c14837. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/USDY41719450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b9fe54da994f8d5d80f6eb42118216ead8fb37564069a06bc7560296ecb07c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM21873037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa716cd82547617da94daee83ca09cbf5c71436459dad833e6e4e6b0ff0782bc5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21873038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9407175a1cc00c3987f1e3d4bf47debec6239c59250e25e2f4cfc63449e588a. 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/USHM21873039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3733f3f61765d8f02ad97d39457b17d02790ba0a83bacca10e29110ebd1ea812. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/USHM21873040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3139c00bddc9bbf59f3a35ab74a5bb69204858282d0d6c4374cc6bfa2ca5cac. 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/USHM21873042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a40bf92fb7bb51ef8a790100c6f714a078d4f6cd85a278a17534a4ca9fa179a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21873043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66609f052b19ad2e1ead5b9a1dced7038892e73c9ff158639aad8696f65c2d3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USL4Q1818690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff478b81ce03d1ee6b0d43a01d129fff9f1dee722b0f4f0c40e4d955b7e52258. 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/USL4Q1818691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc0024db017052e676a6f88b8df9e4c10e120609368ec1b46695cecad25302f. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T11:57:43Z), 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/USL4Q1818692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3801ffe85d51b65cf4556f0bde94dd96d133587e6d36b9d2c03e5ae32a7eee32. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/USL4Q1818693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8287309bfb00759a7d9b305433a3376bb3ed9db4e0988aef2692ebd673dee45d. 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/USL4Q1818695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e939836a87562ff0053fe3732546695073154c0ad9bf3526e7947bad131ec7. 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/USL4Q1818696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17bc405c854d1e3011444045fec991c69178088e26bf0913fe67e7ee9b918ff. 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/USCGJ2291456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306e6fc21d0b2eabf7ae587ab7ed6651f6c9278cfb96b685ddf15eb383640a09. 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/USCGJ2291457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9ab894a5a626e4b102f017f2b74cfcd1009bec430949824e8f6af4863bacc0. 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/USCGJ2291459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ac2c2b66864530b71a535f85ab0ae881f37e6d55aeef5449e461d678539dcf. 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/USCGJ2291460.