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 0xc07db4040d5aade0f3ee6cb2951b4245c51e125b96a796515e61fbc78e460dce. 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/72a396b9-49b6-4c39-beea-ab3c6cfa7e08.json and https://artists.proofprofile.net/proofs/artist/72a396b9-49b6-4c39-beea-ab3c6cfa7e08.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 0x684ea260a8c8673f9d8dd1fc400c89a2604929b04eb512fd0cd649f1a21e3e29. 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/QZ5AB2189227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef002eb2bc2984b4ff4479bfe8b5665d43e9bfdef090ffa8f991dcf1610d2422. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:31Z), 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/US7VG2126076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046cbe006dfe6317c5305c1eda5379b8833eaf3bcb5dd355850ab80c83180ce0. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNJY2218736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2e1428e1adb0062a7b69ad60ac0399219dd4ac38febea9dc799d6bb96b8f6a. 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/QZW9M2213152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26412c824053b1d987bca1ae0638eddcb453d29dd719382ef1a2cdd621c2a26. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US7VG2333297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d25ff7d30f934f85f8546a7a6f227bf8d1f55fa630f8fb0e9acb097ab36f5e. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZGLS2431832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7cf64b02e205e3134c30fc07865b486e9ce18e0b5cca0535901feea5d962d3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:35Z), 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/BREHY2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5935f71eaa24eafeda1f3505b76d3484ad4dec37a38e068daf43aac0678b2aee. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNJZ2582714.