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 0x1728f97cb3e809fcd5510250a8c9ff3b588a53c00bc81111d5b6ee56ce1d65ba. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b113044-c4af-4b07-97af-9bcb8b3c3421.json and https://artists.proofprofile.net/proofs/artist/8b113044-c4af-4b07-97af-9bcb8b3c3421.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 0x4dfbecddb450815e2717584020bfe2bb3b238d3df4d70b844da52aec76dcdf6a. 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/TCAJY2587376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a5ede60dc5c093b7b5f05f422bd3d16986a0d5c388850dd217e2cbefdb7dda. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/TCAJZ2586987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f630fd31e79814248666f23271ccd2f205c8cb4386f2e882e891c2f845bb19. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:51Z), 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/TCAJY2587265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffdf3eb4c28068efead9d76fcad343efee0cc2e278f2cf5fb8e637e001b5da8. 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/TCAJZ2502435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539953feeafd836ed42b2c0de7488cb3ce72a40d3eba51949c2ef719d3c40cf2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAJZ2505597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5753b08812c3e174fb766a036a06cb0beae1dc9f417f7791b98009e6162a3f17. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:51:56Z), 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/TCAJZ2575400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cd192926218a8fdeae8e28c831eeaa60d6ed950d466a3dae6b22e741a54416. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAJZ2574088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf342ae48ee424d73ad90a45865712c43ccb838bf11b97944364ffba40192e79. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAJZ2574096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f91433f32e4638d96e39a350cbed1ba95bc82714eff55712d9e6a28b320772. 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/TCAJZ2574103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15be1b64e7093de775521760c5c65319f7130088055c54cfae5879b84d5abb2b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT65W2530092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a517cba4b833b940bb282b7225012b29d88a18d6653d7e5ba99e47cbf0b6d74. 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/QT65X2506190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ff97ac7de3a188ab11a1519e3c5dde4176afdd96cccfa0140fa50bb06f6f94. 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/QT65X2506194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ab76f798533c65193c79bf47e1cdd30f3b443ee2f9e8ad33851f97cf50697c. 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/QT65X2506199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8befe066fa942db2dd6d5bd9e8ee8a22d072248e7b4b2986aba1590e4453a0. 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/QT65X2506203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97399d5df814ee8bb65492fdfd85977024f22d16e3ee7b6b38bbb13eeeba4c0. 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/QT65X2506206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6720f1086295ef3c2a9ca580adec8e334e5f81c12b3bc0de2f20ab05269643c. 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/QT65X2506208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b30ee3c1595a5e7d0a94011cd88cd9ac7b5533aca2a1f1e60abdc27dc3784fb. 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/QT65X2506211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72892e5eb4bb5f5666a1c24839beaaf8c879c43b8dd8dea16fc5a2c5f2adae9e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT65X2506220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90ffb6d1d1dddd2d9103d43c9a13ada8386778ffc938995b3cba778f54273cb. 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/QT65Z2527589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7103e336df363d9b86087454572a6e5dcf8fa3fbb28da76e43e67638e91eb181. 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/QT65Z2527487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb9028ffd5ed4ec5910a0e5595add51cef3681a281c8bfc6afb9fb4599cad27. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65Z2537900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f052334b01bd7d77469b7cc9abadb5c03ebe28eb7e46e3c42e739762ed5ce7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT65Z2538083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd26515ead67cf29665cbd39bf21e46ab5d0e4c980b9e459749392587c8a33a. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:47:10Z), 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/QT65Z2538148.