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 0x75bdd47d437b9d81c03fe6a0d80cd2e84ec50b1146fe1e45466d56cb2e14faa5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3f731fc-be47-4692-951a-32eb202d3124.json and https://artists.proofprofile.net/proofs/artist/d3f731fc-be47-4692-951a-32eb202d3124.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 0xe26564a609695aadce7c4be6f6f9a928d4639849c740082f4cf3e6d346acb380. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBBBN9902135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9255b0e5a2dff9d43a8d2e18e0b478c3c6e310ff7841ca4d931d83a09f100f. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GBECE0100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea12c6b46c2141419555cf380aaf5dbc3daedd39475422403ada5addfdbce34e. 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/GBECE0200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1530e9bdf60a94b686a217a4645dc175ba81248a81b3f307c2b53867eb8f9397. 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/GBECE0200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4eefb6f482c829d1e81959dbad17353a319bc339cd7e79452e7bc23e0a10b8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBECE0200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ee28f9bb9fbddb1eb9260063afdcf45fdf2f2e90ca0d95c1c48afa3f62ee9a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:04:30Z), 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/GBECE0200001.
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 0xe89a956e72f005bf99b7b7cf6151e35ff7c61acf353af38e09f75791e7b642e2. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBECE0200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a86921a935acc6f68159927e6db093212fc32cec000f2fb56df3a7863d4b095. 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/GBECE0200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880505857c091975afe220551020a16382975ce905e31a989409c5d8735b99f8. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBECE0200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221ac0dda8caf4dde3be49ab858f677fed5576d828706dd268b8897a4ba8a1ab. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBECE0200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257b6591a6022ec854f48f2815faa313f307f57bb6ec91b565f4c7a110a0de9c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBECE0200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb912d20277e22b4608dc8f2633a800b34be1978d02d249526310631204f7aa. 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/GBASH9403004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2702796668e71ca68422539794597258d745db4024ffed6df3b47e1146e6418. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBASH9403011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f578e9bf5a44677b3f8b85681264a81d646670b467ae468fb7515616139a53. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBFGB1100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902b4063a5bd0c5970129b6aa7076ef69eaaf0658596d48db4f698fed186983b. 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/GBFGB1100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174de0719b968f829ae82265bdecdd1b3eacb01d68c296efe4ba904d08b46743. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBFGB1100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b4185082461fa58946537ae249b7b50a3635b85b8eafe1b49428a8b0c45907. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GBASH1139504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451774875426e4c9365fbdd6c0e27f877b405764800501f43523d24d8311857c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBECE1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d43a7f1811aed92e49e7960bcbe9fb8d6979aa2c3aa93bb6c7cc8645c2ef250. 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/GBECE1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf49d03c54f7dca26f91ed643c7584329536dba23af523e9221e6277e516723. 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/GBECE1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cf324e5ff38d98217e52868eb24893e4ecac4431a46cd0bfb3915f5eb58ce7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAAA0000613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5691205df31235e7e0cab8526f203b8a279ff3488dcce6f358377afa7c46d295. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USL360910284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85472f587f75d06286219fd10c2bb2bebd59fc19d0c0077a33e216fdec9c3798. 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/GBAAA0000620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cf324e5ff38d98217e52868eb24893e4ecac4431a46cd0bfb3915f5eb58ce7. 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/GBAAA0000613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0580c5b73e1f887c1e51c5d34f98cc6faa53fde1d2080bc3f3849d12b76f290. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/GBAAA0000623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f4bad6c90bc5f4be66d2e2038e8695fea50a0d92d617de9236ed8241422f9. 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/US3K51200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25847e7f848e07366b857b27d18e81160c9402967627d7419feb316d14e8221f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US3K51200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e2e36714abfea99f50414b74f3d2ace3a57e1a5acde338d615c63677576c89. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:15:38Z), 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/US3K51200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772cdf4189dc821c1a069d70a634338e95c55dad26556a67c4f0ffc6eb8bb3bf. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAAA0100797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dc57183dfaac1d39139909e719a3c7b35996422777354048f90d945b5af754. 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/GBAAA0100798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a6eb87aa35e9e6d41cbffe4192b5c1fbd3e891cd5b9b9f93fa09e53f5fc02f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN960330518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce1c22a6568a014111a233d46341680d0bc0e6518c2deb54bb308e5c23884ca. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBAAA0100796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0ee2d5507e784224bfd34f3670477221cd206751ee444c7362f724a2ff1e3. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GBAAA0100800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a33f0eb1c756cb97cb76cdbcb147b09ea0cc2827d3d830fcf71f7fa02026b4. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBAAA0100802.