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 0x3b46853fa37cf41e9f079aa415a0ab198dfaf30640dd8c70141333f48f37f317. 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/6f3a313c-5830-4b2a-a930-1e5c227c5158.json and https://artists.proofprofile.net/proofs/artist/6f3a313c-5830-4b2a-a930-1e5c227c5158.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ben | Michael Jackson | Alison Sparrow - Violin Cover
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 0xd556d85f4951b2e73a0a3eef4ca39fd6eab1e2b2695e16b5af07c2d50af1c118. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USE830936754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5919c7da617b2db35709ddf6ebf359aaa0d9fa33e37bc2752079695e8583f03b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES71812608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d2d5e99f39e5669dd3a8fed8983b7ebb95797ef74c8675a3e3173c9023a9b7. 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/QZES71807271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14edeb2c7c5c3bf6b75436034a794d1021b043a2fc8abd02035d0cfde55824a. 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/QZES71807282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dcfabcbc20153253936c86053626002dd6320f34d6af555806a5299da3e567. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES71807019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943d614c3611f18b35c6dd6c712669c8ddddeba5a013ac900e148328e79ea095. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZES71808830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9c70e30c116f468e590ad48f8b8393a85ff217a60df8e278c94c03ae2957cf. 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/QZFZ31981625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1c19677a93ee505ad60031f05aa2862cd116581f6856596b93f5ef8a94a3cf. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:17:32Z), 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/QZFZ71969716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd5486528922acbf0c57f24828851590fb358e3e9cefc98f67251c5fd834441. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:09:40Z), 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/QZFZ71969720.