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 0xc1d118de2acd320916094ba31f8b1a09d4c8ba7b9c1c02e4c2573c2036320905. 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/e5fbcfb0-5e85-466f-bf74-9de6795c1e03.json and https://artists.proofprofile.net/proofs/artist/e5fbcfb0-5e85-466f-bf74-9de6795c1e03.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 0xe71fa486fc3e3e0ea52424112dc7c83496d4f35bf6a89f4b1970c6d60e7d3626. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:38:33Z), 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/USHM21267455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951e17b7af1bac0e6bc3aac414c3c6e0f6afe45dd1c549e55a282913ba6b58f6. 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/USHM21267456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913bbe5d78b2bdb32043d2c21522e585e29e4e4112dba184324a50941b69e783. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USHM21267458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d10fa96407144855d7389b53d5a3a7b5e0692b39a9098ba15e79bd8f8c6ff43. 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/USHM21267459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1f2c4c11b4aca86c25602d6b746cd39caa16b94c7a1a7b0d8a43bc4487d866. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:07Z), 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/USHM21267461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee1846f1f35fd3caf00fac488819077c3d8a5ec90d1d991b21d0de04a2e4571. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USHM21267462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b339db73ab168cfbf4e6989e0014e7a5c8f650a9a6371e513f138462c9a1a2f. 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/QZ5FN1863904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0d8d011d1f3b39ad6415820f977fc7454f1a9af98ae6efc86dac0d72de4342. 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/QZ5FN1863905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fe3d87bf20a8d4f086e5807b4b968d928c777b12ec65a10eaff6726903d93f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZ5FN1863908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae57bf108e28306162304b9ebdba9b2629c35ae42a2e552a2ed5257622dae5e. 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/QZ5FN1863910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d9e14913f598525a42cd0d87ea40f087dab2ba12fe2f7ac2b31754380994ca. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZ5FN1863911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9375b867119a7f2397a51c15c8cdc3d433138a07929d16628a7bbc16ba5d40. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:30:33Z), 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/QZ5FN1863930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b515999df12c95534f4dab1bda23968d99737e486d1f0f5f813192918bfdd9. 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/QZ5FN1863965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ef82026de258586d16427da1622489102da4cd6abb6e7689730c88319a45a1. 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/QZ5FN1863968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aefff8933be433f297b1e785f22696b717e34ae92c3a5774aa15f765124d80d. 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/QZ5FN1863974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5b89c60851116ea5bf903357d07a35f1d467944f37afddad96237dd1c3f873. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:45:42Z), 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/USHM21267465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15f83073bd8b81df4306cc68d51c736b7c4945d189e613b1b80cc1f0e88c8bd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USHM21267466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12523694cdacdc9b92191e6d54eab468e2689e3c4467e90473f8c25f6343675. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USHM21267467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8430ae2321ff67e66b0a8d2271a2cb5434ee9a1596643c52c9201f03fd3963a6. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:58:33Z), 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/USHM21267468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaa57e097221111f4489c0b1e7f347826f2d04797f5ebfdb41f7998f4f67522. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USHM21267473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5093a0c2e136dda4c7f14973c63de431db880b8a4bf0b58766c3dc7ab0a7a0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USHM21999091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56b4069844030cbc6853a1a798414d1a677648f1e82a5dfed5363da841028df. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM22022364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aefb97c0e09e99514b97bebe5b6bf37ba2d1a2bd20f46bea84e017d51559d9. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USHM22022365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715b26a04bea5f6f1696f28e9e4f9ae5306cff140b4d4df319cd9c8c6330060a. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/USHM22022367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52e6b47603c95bc4db9c811c01d134eb15479585b8be9105f73422ab2da89de. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:23:41Z), 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/USHM22022368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9e023798dd4c6be9c1225aa14c7a46e19c304c18c7be96d39be1c4eae20734. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM22022371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67085b88c71b41946d0cc37d2e30184c81efbcdc323a0859e5cb6172ccc5826. 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/USDY42255557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b29417600a9623cf540087db28a92ebd9a6726de2bad0648c0cc14c5525f5f. 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/USL4Q2591775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8723c8eb124dfa243198c2cbdc0b7abae7a00f56f4c0d0485f3a0cdf72c0c8. 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/USTC10770499.