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 0x6a931ce5e13f620500f561d1e3625fd654b2a30fb0e7a2f8debdbc6b5fce71fc. 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/381a3cbd-69d8-4f8b-8093-47acb2413f26.json and https://artists.proofprofile.net/proofs/artist/381a3cbd-69d8-4f8b-8093-47acb2413f26.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 0xa4b6bd88b0640157ccaaac10559a3a12a6a5c9bc076ae5b3379beb2586ac8417. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:50:50Z), 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/USUM71310220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3d127be5cfbeb9a2eef14df9f2e3ee20d2e7f6295954105a452bb5f0bc851a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:38Z), 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/USUM71310223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60366e22e35742ef0692de7ecd11a981022e331f154c749ab314416cc36aae52. 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/USUM71310232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876e3d10dea9645b089de480738eed04ae201ff2079ce06d3ee537db9787da07. 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/USUM71608670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85fb6f4fbf83665f4249ca7b25b6039b9173bf8673b8b5a7248b1eba5149d85. 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/USUM71608833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dff3273ebca1fd662616bca6c0fa699f041128299f3a2335283436fe7608f8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:53Z), 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/USUM71608840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e2c246e8b0c82a75574bbcfcb81cadc4a64412d1f74b6c5d03a9ae10386096. 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/USUM71608842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392d5d5786a3c6b072bdd52b97f3982df203d1202179bd5831b147a517b88695. 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/USUM71416252.