thumb|3 SureFire flashlights, M2, M3 and Backup SureFire, LLC. is an American company headquartered in Fountain Valley, California. Their main products are flashlights, weapon-mounted lights, headlamp
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 0x7555a8ae4a5d58be8ab1694fae117d63b4a59abbcc6a21033f1cd85c62f22225. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/63987d0b-3ced-41ed-91c9-d67b62551cb7.json and https://artists.proofprofile.net/proofs/artist/63987d0b-3ced-41ed-91c9-d67b62551cb7.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 0x8523d6e0dc8612a73ac5d06f20c4c2e285273e0b34ac8fa62b9ae9b10dc3133b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:39Z), 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/QZPLR2258148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135ce4f081d16295c790957cb0da35644ff315c195ed13f5114d6c1a532e3674. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAW2255300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb591b0c492e965959595dd08808f316d91ab7450db52534f9cafa9d2ec840d88. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN52375926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a0f624ffe8e7d9928796cfdd950199e402ef51e0869b4b14d5d98c4911f708. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52375927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b1e278adc5ae4287d302b914662c1f2e77bf996a29f0d279f4e726f6164249. 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/QZHN52375928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7754d1fe22f6b82bed43476cbf49c85928501792f5a34ee20e678c74c025981. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN52375929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8911dec6387a2c9b7687d7d31cbf11e0d53f8c54e72cbf0568521fc93ac1fed2. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:43:08Z), 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/QZHN52375930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47954dd809a43d08b352bc77d51b556a4cca28d0daa97ed63c7b7d8f6fbf491d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA62428525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47954dd809a43d08b352bc77d51b556a4cca28d0daa97ed63c7b7d8f6fbf491d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA62428525.