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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 0x1ed0a7728ae4a93544ed8e41ae868eb56fabc0b8f9de42af03bb7ccf89a08304. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbce0e4b-c2ea-4d73-9553-fbbd74784c4b.json and https://artists.proofprofile.net/proofs/artist/fbce0e4b-c2ea-4d73-9553-fbbd74784c4b.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 0xd4d570c725312b35771edad6dc658d323fce8c6fa6e0d447ad8b8fea70a433ec. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGJ2312566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1ff6fb6812ce61bf2899292b01bd6030cdd46c2bd1dc94133145a404153630. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJL2578984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2eb473e9ca6805ca313423dd5ebb2fb36293175e22b43c787e829362291b27. 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/TCAJD2456908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66304b9b976cb638397bb0d01376e887d7ade8a21ecf4bce81ee59c8b86cb8a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:13Z), 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/TCAJC2457826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5edb87656616818ba7601827c88722280ab9085d9c65edae114febf99cd9843b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:08Z), 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/TCAJD2484915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3cd596b0cb0ed749e8e8bd3c2e8fc302d1b57b9e82fd49ef29f853f643ce38. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:55:53Z), 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/TCAJD2416281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c75ffee6e43960d9339238fb7edc98bbe588539bd482623fa2dbfa388fc3e6. 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/TCAJB2423665.