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 0xa0fef400e21180a66c3bdee83f1aa66aa4b67ca20bc14ca5cc2cdc58271e59d1. 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/a34eed50-c5f3-4d91-b83a-722417576e5e.json and https://artists.proofprofile.net/proofs/artist/a34eed50-c5f3-4d91-b83a-722417576e5e.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 0x7eae69b3b24d157c4ae374a8684f4a6e0c3ae7926ac79fc5b42f214e98c42f1b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:08:04Z), 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/DGA062278144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036e7137ac70b42773a7ba544604c315dc23ab5511d05422f83ba4d88b24c9ce. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DGA062278145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fef6ea7cbd683fb471390bbfd37c013c4c84a033c56644e5c0ac2ff9be6b48. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/DGA062278146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde07518d6452b41ef98f2bbdf7deca2d9fd94f735ed59970a67f88bb54ff7cc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:07:32Z), 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/DGA062278147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc104946a73dd0ee0d067d2d0ae9643882e2331325c96b01b26d4acd562c3149f. 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/DGA062278148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07b4561a5cd9c2fe3757587b777b2e1d0134a0c0af809f3279bc12180bfae45. 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/DGA062278153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda0399ad729d0e5bc065e262960a42802c9f6cfc93f874a8dfe5781461133a7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FRX202322195.