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 0x418efc907e1298bd824365ee735ef1fd22ea2bc10d9e67d9350a3a5fa7554fc1. 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/bc81ac05-a407-429a-a481-b8955deb267e.json and https://artists.proofprofile.net/proofs/artist/bc81ac05-a407-429a-a481-b8955deb267e.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 0x13ad20196500e5b9d0c3ef70d3e778cd53d54883b5358274b4cd11426c9fa237. 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/QM42K2013944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd89d21b7fe8160033259ed3b6a75b5eeb159daefc518b8f29fecee315227006. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:43Z), 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/QZS632190042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf25274ebe84841091166272694251e1824ee788997172dc11a96db35d6887b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/QZS632118778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c3ee13f527cae79d6b257ce60e97c685571336747c902989df65e9c769595e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZS632156794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8bd3ca0500eda4777fab3c357e8d7d95ac822d61992237924a0196706c8513. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:34:44Z), 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/QZS652286255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0d333ffd68b9d595d685d91390767a679da751b6b20fa6573bc743e93121c0. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZS652288581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf9071d678e2563527d48acfef8dff463f72436006c53978974bc6c24332c5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:06:07Z), 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/QZMHK2283938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9169f722ea0b46fe8b152ffd0d5d0a8d9568fdeafc3b0d622fe6f7c6f5ad59a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:48:11Z), 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/QZZ762515271.