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 0xf981f0b70288fd7c489843b5e2b41b507d725697e6ab7243c0603018669cc458. 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/d98b723f-4860-4906-a79c-42baa6b64289.json and https://artists.proofprofile.net/proofs/artist/d98b723f-4860-4906-a79c-42baa6b64289.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 0x74e3ef0236c6d8bf214a6820e89cfb4d19d29919ce9d8fe83ac39be872832ce6. 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/ES71G2205052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7381a2104017919600907dd93db8c4546c9cfdb0e06746375b233829303090b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/USDHM1531529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7d38a21b17977a68a45c3dc1eff1837b896213492edc1451cb91bde6387ca3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USDHM1531530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6d49c82b3ad0a2c474e294cab9ee8843f2dbf08b96c3afb3d8ca82feeddc14. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:02:31Z), 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/USDHM1531531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4752b230ea152f6b500818448d44dd3c5d5829a6e642c8ae65c47ca3b68230. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES71G1908886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb692cfee2749a6ae269c536b21065d15ba52e84f0c9d23553bdff6d4ccd9b351. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G2039864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681fb0c38a66f1a373c09a91ecdb498e0ef3b17e859d53032c2b6cc858fa70a9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ES71G2103951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42857ef4125e78184f651a35cffcdb5b097704d8a1fc0f83075b504be23423bc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:28:05Z), 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/ES71G2226657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e10219060444b8cd40a3c7cb4f2a08cd7b7c95838280fced242d0151e089ca4. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ES71G2313483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31fbfec50e40c90473a203c2d255c2e58f5f6a1993d19864fd5a8365411910d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES71G2402126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9eb08111c9aaf96792f9eaa364888a2f971ae44fc992c1a49cb10a23159d81. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ES71G2409517.