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 0xf97609617341865f21f4a57b0be0bec2479c23c06b1ca0e5e922e14a7cc7ceca. 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/dadc3e8b-db8e-4e5a-90ba-69837b3c0ebc.json and https://artists.proofprofile.net/proofs/artist/dadc3e8b-db8e-4e5a-90ba-69837b3c0ebc.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 0x92331f8adee9d04472b6ebbe9ab8aac2c297a5eda6e911cdd76233e054ec5373. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZXLZ2333246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32819183c776e152ba15b29a5e5db7dba692ad8540123cadfb3eb4ef56b2787. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZYXP2356088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a311f4b175eaa372d44c9e2be9049c6b8f52ece6de1d0a0cf859cab7e7330a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:18Z), 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/ESA122497534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef20f3adb58192f485b85dc181c87a61a04d1a95f3d806f88f3803c8d5ed09b1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:35:14Z), 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/QZFYX2574315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cc1f8622c7c63126acf3e91ab20f5bfdc7b55196144128f99d382d70209a03. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZHN92533357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fd60e2a209dba8ccb9047ee93e1f6182bd31e1262a4ce983580d53b34aa522. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE57V2504666.