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 0x5be2b500943cbd94eb833ad404eb05cab419c72612ffedbca752962795ee03a2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae65fe20-046d-4bf3-81f4-6f12f0ff55cc.json and https://artists.proofprofile.net/proofs/artist/ae65fe20-046d-4bf3-81f4-6f12f0ff55cc.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 0x2f58774df46bc8b14296a0bf0a9b2f28ee1cac5c05ef09e3606d7e0f1eca0d39. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUDHU2402013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91df8c63b4c26c8411e2cc531fbb0196d46b871079e4baf9e91877e265ccc0c8. 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/HUDHU2402016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74c554c6f14952a4638da0ee174e7b9c4157e343a9a1316cf3192add21b5516. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBLLT2501596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb811b196428b94bdb1c3a2cc8fe5bdbf498945d09348650188b908322b51836d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBLLT2501597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46bcb950eeccfded7bf3e733ca4a26f14abe730583a298285a09aa8ed77ea82. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBLLT2501598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ed672528313ccb45d7e434c8365b1b14cc3e56902597f595a3ae5af9f0508e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBLLT2501599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18641c3d40d7ce3bc9ceb1402e01db0b1ce28b420ac77d9ed60e45bdc0b1c6ff. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBLLT2501600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f55c8b1fd5ed52f39274df2c4838bdc28b79280822947e8c9e28e2e2d883fdb. 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/GBLLT2501602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f35058a9937447f664044fd3dbda3ae4e4518004815216282ebd00217c7c400. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:42:39Z), 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/GBLLT2502826.