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 0x8fd35032fbf65ce76f76b1ac4a21d9457e04650f01af4ff012665147ca4f57ce. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9cfba31-ff56-45b0-b141-9f950ecfae24.json and https://artists.proofprofile.net/proofs/artist/f9cfba31-ff56-45b0-b141-9f950ecfae24.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 0x71581b78fa42b8f5b14f8ea12933c8af5e0b58b79f11669ef121c82933320ac5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T09:00:45Z), 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/USHM92215342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac62ed27659895921379cb67aff95f53bd08a7a1d9356602de4f585acf4e14db. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USCGH1870621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb73ff2e2b8f67cd99e45444151f048191e8edde42585dc2a7ce2d7984416b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:01:30Z), 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/USHM21972862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c3e5586799d22698c7916ad703ad7f83f51a692ea5eaa71d795220458dfdf. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USHM21972864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd03a0bd67ba91ab34bc551ae7cfc3f55827a83a59f93fcf08a8e1e90f1bae8. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:02:01Z), 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/USHM21972869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5022f4092d2de04ae3b84ca84640094f0e513e30eb0f80a16d505339a50e4a09. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:03:25Z), 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/USHM21972870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea7d09fbd2fc782537fe636eba69b4a321991386643be110a18aca3f8d967e5. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USCGH2052909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f581ebe1980af5638d68fc31980d2d897cdc373a9334543353d9aa66500dfd. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:26:42Z), 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/FR59R2239747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e5eb5840b7e776213a6f9cabe61e82d947af736f354db065cdc143cc123407. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USL4Q2281087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71409c7987c9391349ffa248630de9669f8c013fa5a6d6ae61881d17bc32d064. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USCGH2595575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e17d664ebb237d6dd31cb341782fff62f491820938f532fd6447da3720de53. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USL4R2523270.