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 0xf9b835f8f91de8e8b15e4cf99386601d0743508db0a46eb006c94847e97fb266. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86cd8f4f-6cfb-4df8-ac2a-47e7ec57b582.json and https://artists.proofprofile.net/proofs/artist/86cd8f4f-6cfb-4df8-ac2a-47e7ec57b582.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 0x74d636966885eaece057e02b631312dfe2a5f17310ef3bb529ce4dfcd5d33b8c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:57:29Z), 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/QZTVM2316385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e95f28210eb684bb819b235846bf51296928b5f516a5942ef544831fde16e81. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:44:41Z), 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/QZW9L2362255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2951ed9a261b9915d3ef668c82491664503c970c9f64035bbf53eb2c8b4d2a7a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZW9L2362258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341326a845e349ce77b7a444e989099b9dc961365ee6782ac6dc0a3f7ac734cb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:10Z), 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/QZW9L2362260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff99da8231eeb154fd0dac949e3bc1934683ab5ed833e7b805f571e69f6232f. 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/QZW9L2362384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f35570c6dd2c1dc7cb79148c58aece38fe8c962f5c4d7780dd0b6065f41373. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9L2367198.