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 0x3fe8a3ac0e2dbd068be6eb6153a68745d7dd51ab0e4475d5182c5a6700548b79. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5692ba2-3ed5-4f5b-8c25-489205788740.json and https://artists.proofprofile.net/proofs/artist/c5692ba2-3ed5-4f5b-8c25-489205788740.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 0x207dbd2ad32f20624461ce7c3a36a7577b5d245d6cf6b5a9bcacd4ab6b34aa85. 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/BK4DA2319127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181cb0bf3f7fab76bef17a23d7a10f9065e2529ec9031b6d9fcc283e00e63a66. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BK4DA2319128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce11e51caeb62bef47ae0d317f1228a97c2f54bea785cc846c50a8b0640af68. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:55:05Z), 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/BK4DA2319130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db247d59624c65fae9d1414699bec7eb9f41e4b84712d6af552c3af7bdcdae4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BK4DA2410287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4447a6fc81cb731a6e76bf9a8d7016a584ee6c17e93c23e880b7fc7778f2e77a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BK4DA2410288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4120893178a8cc4dd7695c474e42fef412e56014e675363464f8a3474dfbc5c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/BK4DA2410290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ee3c420204aa3b5024f8d16808d3156dfa5b06cfcd32ebfafca9a6990dceb. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/BK4DA2410291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9364516366f1ec23075035bc1a3a65bbdc192ce476b319582205de69bdbf5b1. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:45:33Z), 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/BK4DA2410292.