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 0xc249562073cbd52e96ea919afd986c4f571cbbc43a3c1a75eee98a6f9a2b56f3. 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/77e2b17c-3167-4ac2-a044-b5022a5cadcf.json and https://artists.proofprofile.net/proofs/artist/77e2b17c-3167-4ac2-a044-b5022a5cadcf.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 0xff0395eed554db27dec00e7c827b57eac8d56a05b6b8c152b22fdce9e8048223. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTB62246909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f22cd9039d1d69159a4eb38aad1aac78ed11033bb3f127492b9ff161b8a2f6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:01:27Z), 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/QZTB62246911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb87cd7dca2bd9ceabd2670d7a81ab13adce06dbd941fe8ee87c8380093925f5. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:53Z), 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/QZTB62246914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ee50e7bad53616d374d45f5a12803250c81b83fe691095869a288c2a7c73fb. 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/QZTB62246915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5f6a0442c07753a5959be7255d091aba21d4336e9a571f73222ed8b51ce7cc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTB62246918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf1f04716a3a6df0f32d1b7e4686ba653e27b8b829a3dd8cee19b0e7c7f7c69. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZDA82302992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4b6af1ed85d3e75a4c70182ef12357919436a1cab6b2e357d81285faee87aa. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6F2309776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf880492d7021652c1bb34af1c4630128387c08b9ed436ba029034ed3a16b8cc9. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZK6F2309777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95b4d51bfc704587cc128b612efb36bc7b9005baf7b4bda8cb492e3c6a2d43b. 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/QZWFM2352692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a5c7578cb3f0e60821485316910e3c6b59f0ee564f91e39b81f9679686d3f7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFM2352695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb3df6e17d1762ea2c94ffe489af141809a4c02f80139f0b2e416fe701b148f. 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/QZWFM2352704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd1dc0f55bb723f1efb329e360177c2705406ed8ad0263846c19075bd92f28c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZFYX2437805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb9f1b1fd8c6dcaf52a3eb73b12f7d405a5db83bb4e61359c1ce37d00725205. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7M2433371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d14c62ae7cc10ab9a2f6919b138dde17d9303f1380d083a55d920af66b73d8b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7M2433372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeebe3a5b688d68e3cb979dcb92519e383260068f4fe95388793057c2acf2ae1. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:31:50Z), 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/QZZ7M2433373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99ebe92c25b8ab54d8b89863cc841ebd92d3b2410c4a6e9ea2502211e682405. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7M2433378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75832f3e0007e9745eecbb17761ecc46ec81531bb2667a17b307f4c7f50283c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:36Z), 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/QZZ7M2433380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3bf5467ddf25205b4b028d4208f00edd6132849d5b38c9346f28d45051b4f9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMEN2592706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c52908eac7577e0f6350724a3ad661500498e429f3408f412e357b3f754c9d6. 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/QZZ7X2543715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23b9c4ff13a94e291b18956f86a1396aa4bb920338ea3a2b2cab076158b78aa. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QT6EG2510039.