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 0x2afd469733a3fee770f6efebf7fb6f92f6e31434a1ab31f2af31817d90a11450. 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/0656858d-e598-432c-9bc4-6a074a592992.json and https://artists.proofprofile.net/proofs/artist/0656858d-e598-432c-9bc4-6a074a592992.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 0x1d36c268b37e58b28599ef0d144af51e69a12f3d533ee75aa5b8af7a114fc9fa. 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/QZNWV2306895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5244d1545d6a4e857bde81fb8ec0c946bf25388cfe348f24b0e6ae441126cf6d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:26:44Z), 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/QZNWW2367746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20447f29fdbd98e6db0f7a7477e8a40ad3f2b2563723d646ddf301ad0726a794. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:07:04Z), 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/QZDA52319751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c535774a665c4e5fef7e40320cb6baa1c3bf2c49d4948b96b6c1bb8076110f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6H2384226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbc38c2440b678df69afeac12b557abce9c114c5b55d622ff0d2f7747e6b2c7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:19:26Z), 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/QZHN82369214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89605a886c927111555aaab410072a27de7e049a4fcff5be5a14843a5d019da. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZWFG2355690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a1face76bc8e4f5243abc7ddfcb67426b121b2db5ff6f4fe8a008324d2283. 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/QZDA52447836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf117de2a2ee88356e9367cb0fe9445833577efb7867bc7e5cfc6978b4992da1b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:49Z), 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/QZHN42407066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dfcc488e3274757aa4e37a2b87c674e33335b74c8872eba68fee6e13be1a48. 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/QZZ7P2409752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1afec763b6c889cee9bc914ddb6971f432cf20cdd378e61dae8de3b30e4c46. 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/QZZ7P2409753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcd2c36fc1927d86ab959777f078b58c1dcbe1837d8be18a6bc226e8f113558. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZMER2435890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1a1face76bc8e4f5243abc7ddfcb67426b121b2db5ff6f4fe8a008324d2283. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA52447836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c16a8559c82a18025b8d46d4ca27004761e487e1696ead2a61bc1d5e30f7fa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:42Z), 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/QZK6P2424228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af1bf9d0fe5ac485874c0a85d8698c7b8b232db0b559f5a59978a8d7bd01750. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMER2582878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc836ef66d9faf6092e752be25899ae5107f70f4bb8a209a7ba89f3f7f91c8c89. 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/QZWFH2596569.