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 0xbee084a1e0b4b5c60cfa6c91a2387a124efe34b3a15071c95621893c7b478d95. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44a14b72-1bc6-4dba-be55-5cab5bdae3bc.json and https://artists.proofprofile.net/proofs/artist/44a14b72-1bc6-4dba-be55-5cab5bdae3bc.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 0xb215a4d7acd18e74dfb85dae300b59d9b101737bcdeeee53f0049ac7e570d0df. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:11Z), 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/KRRAR2414366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44d71a41c2c5214dd9d52d4b5a517090ccfb5f0cd704c9aed33df41f66a2f01. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/KRRAR2414367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856760f0cef43f1b2ec0534a2cba5706e8cafbffb9d87c66ed51550917e003e4. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:45:34Z), 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/KRRAR2414368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc487ac951dcc18ad0885b7b45a89185849767d52c9ea840f704e114b8e0cb63b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:28:07Z), 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/KRRAR2414369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9cec2324c6812e4850e188c1f56e6dcc659cf181ea6ec1fb91f5b163a6e88f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:34Z), 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/KRRAR2414370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefad61cd707e7bcf5b47df29c1fef4d08bd46285193d724ae6e63991723f1c1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:04Z), 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/KRRAR2414371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f985e02462c11062ac9dafc7c67fc1adc1874de7b5a470c301392292215771. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/KRRAR2414372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2cff43b8fa43f2995e53e2e4f98b7abf7cafcef26a46a76435b31e7fc04aa9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/KRRAR2414373.