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 0xcdbab40c237d6baf89e2d53e2c07c5366268393fb316e64128dbc2b09dea2024. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/700717fe-57d6-4ed7-b668-0f9458977d37.json and https://artists.proofprofile.net/proofs/artist/700717fe-57d6-4ed7-b668-0f9458977d37.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 0x70d5c62438b449d7328de9473059d62930cb2e7afc838929b16b7c3353678b46. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:49:28Z), 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/USX9P2375880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257269d77c07d0004975767c4d3c5cac5b8a32977c09112a5437dea91b67fac1. 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/USX9P2375881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e5d9a0f09859b7120d750cc2f76016ddb0c96969651c89042b07fe596718c6. 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/USX9P2375886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c5ca54960629c64353f9f4b5666a644b3d711546112285a668f04196dd42ba. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:19:56Z), 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/USX9P2375891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb663177cdada07b87e882410686ff1bc6904d85ceef76c377e9eee0fd49f3c0. 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/USX9P2375897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df01ccefb0bdb41888fcd5d3a0ac22a17d4993e3c26aefe9c3ef2c125404e6e. 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/USX9P2375900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55da36687fa12eafd943b36713cb0492444ddef34f22cc69fcc1a2ef7cd751bd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USX9P2375902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218e6d9bf8807973a793d16f7143d8ee90efec85134cc39ce0f66276925431ce. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USL4R2351975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4563d4764209982664880494477d7adf494955d2f44802f6a19dd36c7266fee. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/USL4R2351978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7131d5112bebfa93c28153e5f27edf810513bd1a494d41538d96e51b8c133719. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:35:39Z), 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/USX9P2307247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcaf3696c04f769b432cd2b9d5711683832018ed1beab4e42186fa1af82faae. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USX9P2307248.
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