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 0xc13728388402cc478c9a9ac07260c7b0d5b06d8d254fab3750608452ba82325d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1998afc0-8b9c-4519-b31a-c3549bc5c8f1.json and https://artists.proofprofile.net/proofs/artist/1998afc0-8b9c-4519-b31a-c3549bc5c8f1.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 0xba82d199bb225055c53cb49bbd5287acd9cac325b038ba388045b11a90f409ad. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ISV442010202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b96f455e422fdbccfbee74ed97ab87351f79e5e88287df38c5cc952b3c3f0e0. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:37Z), 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/ISV442010203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e10502cf7d1c03eddb6a0781d32a1c018660768ab054b369857258d6be8c73a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ISV442010204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb5f30615d48d7f08ef923e4c98eff2b00d85b495522e186c28ac2d3f30fe31. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ISV442010205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb639865f8b04faf75e881c5f7ae38ebf716aec1e86a48bb343e71ca567f3f0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ISV442010301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90703a29f1c60c18a01a5d1551eceed258d42a0747738efef9bf160f8e83ed33. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:58:48Z), 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/ISV442010303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4a6db8386c1ca07cd9823facbbb2caaa8f4e78ab5870894ee5d630a3a9b327. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ISV442010304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4666099e56c5b7ddf3b0a3b721209f3fe1d8faddd500769bad09c029790e73. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:44:50Z), 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/ISV442010002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8b9dda33dcadbf54825ac36bcea582b3277bfe68ba141fa60b3bf1edf45260. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:43:52Z), 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/ISV442010003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe290356e6c2cec76b51b77ee3bbaa2c910049792f360c1be63c0d1269a6adc63. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ISA220801586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3799995e10be449b47297027cee2072a8a5cb691f83390c519c66422fcfa9079. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ISA220801596.