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 0x7e3bf3d093b66aff00c0d115011be0037820542bd644880d5aec903a2593a684. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ea9a9ce-183d-4bbb-80de-7468d97013b9.json and https://artists.proofprofile.net/proofs/artist/5ea9a9ce-183d-4bbb-80de-7468d97013b9.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 0x264731362f7fac1cbcc7d78b778ee5b8b74d857ae78f70f8803852aba80f808f. 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/TCAIK2414791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbd07750fccb43427914a0f6f8e5fb1c79434ab0bdb517872b8dabc67c04599. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAIL2494106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d2bc39c59d2b13b173c2857a55be6c5b66eeaf08ff06ecacb6ba61fd33c777. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:26Z), 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/TCAIM2451978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d28fd5fb7dc6b64e2cbeed84af30e46d94f93e03eeaafa60de95176f3b70f7a. 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/TCAIP2448949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee5734b53cb97d7dc1d5dddfcdf7104575e0501e02979d9ce7d710905cc63b0. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TCAIT2455300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b12efd39c90ba86541ea5050afe901738477f1bc493952c5723b3d395e9012e. 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/TCAIW2410565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ceace61c5c5ea6e8005f8437f3e6f800f722466c2e868982bb48c6b3e5953eb. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAIZ2461771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dbdc5789f1895b271f27962d93dce753999c553edfccb2f08d5a0615e04cb9. 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/TCAJD2413091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad56a34e08d088f3690c418a048ae7753d2288288a1c67ca1e1a91cea874556. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:52Z), 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/TCAJF2528183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4ba7f024cc6f0da8a61648867173f31a867d1178458e12e6d283c39fbdf400. 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/TCAJK2555846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c772dd2938815b8ac330169d207dfcda6ed149a9fbb4471d8cf2bdbb95299bf. 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/TCAJR2596988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4044c4893a993724d5336712a95ab7c5980fdceec5c4e4ca2091086f5e4a1d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAJU2537255.