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 0xd7680acbbcc866a4d0d62131c4eea5d92b85e5bae4aa5f766af77cc5d802463e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de9f4fe7-ca1d-4dfa-aadc-5fa2544cd530.json and https://artists.proofprofile.net/proofs/artist/de9f4fe7-ca1d-4dfa-aadc-5fa2544cd530.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 0x66f7ac52aaa38f0bbc955036ef6fe81362c53bb4cf4869e8eec343fea7ab9e59. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBLFP1961166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc68c9449b263c59e95cee77c2c93c6d7ad0f5a64232c8022e1b621cd85d99af. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBLFP1925524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262285b86f6c3577d16fa07ab1c251fc8ccd81f7dc6c5e03bda3aff4e2bd5549. 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/GB8KE1956219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedcfac4686cc486b9ae8ad564e5393bcef20ce5f67e9ac574885a3f5baffcd4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2418414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439d37fb0245739043d1464f97c9dafe3bfbdc7abb1291105b4d0ae3ee44bcdc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GB8KE2418415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ce084785d5b758acb2c8d9c201e249523a47603f511901021a44440d201b2b. 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/GB8KE2418416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40dd0a9b1e453e933445becb1569193717b8286dc256fe7d4ba539bdba60bda6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GB8KE2418417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d410f9394e8f85a5ba056a745ab86cae4073ba690328382c55678d60ab2e22. 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/GB8KE2418418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f432635f4c166429e668cdbcc262a68f7e771ccfdb0f59b0d584d874a99e947. 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/GB8KE2418419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ed26782d814bde1768920c38e0b5ac0a80c7c6aa711c532e9ceb49892b7d45. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GB8KE2418420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87028c54c862b2ba1f49f075418cfa88252f8b75a346c45dc593163c7c281c60. 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/GB8KE2418421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263382d821cc6bc4f4c2180fed14b585bd28f96a620ef2d9d55fc69c0a372c44. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB8KE2418422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8adb1c0c8a02e94ad79124e03433d4e78298dd329895e7d7af08e1f08f830b. 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/GB8KE2418423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9794774e039871f407257cb85a9f0b9195879d9551ce5d70344d0770973f3b8c. 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/GB8KE2418424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680ddecb3f360e2f807feaf76b5977632c47615e08448f2dd5de3e6d8e03b9de. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GB8KE2418425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8024727895e4c4c329762093cc0f59a3764675ef1ab15ad100b06dd9b45317b. 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/GB8KE2418426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64518e980b4ae9ead50dbd10f89f13479b5433a2a6165b7a457ca78a3e0f928c. 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/GB8KE2418427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8a0cab0faa4e7a87122900244c33795091e2f50023d5a40bb0fe41ba5d089a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB8KE2418428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e72c5e95444c16ddd2a2b2b4e15000bd3165aecf16e7bc31c2bf914406dc19f. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GB8KE2418429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d5a82429cfe974ee46bf412d5a7686d0884e05f9a4e0695bc3e212a544c045. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GB8KE2418430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f8de9f18e4ec3a969301be4ae7bc01889b2aec1bb6d791046ade7d5b85619f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GB8KE2418431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202c4c854d5221882b14a7f74015b610f8cfd455e94a5bb494dde9c47237dcd. 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/GB8KE2418432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d441bf5b4f10de86f6478cef7c03635b776b126dc9921b4e2d4839add1c1ce. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/GB8KE2418433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1b59d5378376240ca6ca1e8d281fba601e9678b83c811140df2e10a3ab6e0b. 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/GB8KE2418434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37676e0bf83125e37ba0c8f570e143e83bb01d7429c9540d8656d9c100192445. 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/GB8KE2418435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8eb2fadab64612ca2f3315ea4bd629e390625dbcbba2dd21dd5618bd8677bf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GB8KE2323577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13291a525e45d80fea47af8774fa3a38c35ad9acc099f9e8cf35960c36273194. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/GB8KE2323578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09b97b805309d2fe04c238d2fc932f749f7c900771c1f5f3fa8ea7a37fb6051. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GB8KE2323579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5ef45b114d056e8a8b0c5e1d2d0e3ef5b3474ffc56410005228135fc884006. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB8KE2323580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48f6482815ee4a22b79602d91923c9f73b460e2e00a1a0c06e172801bdb8bd3. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GB8KE2302681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906ac36eb2c7d9cc0b075902081865dfc3ca975d2b47efe55022b4f8b0f9e329. 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/UKQHJ2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f45fd83ba0a6c60a43f4092ebd381e55c8aac009478faf5df9a58382d59d5a7. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GB8KE1952371.