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 0x67549787db81369e4e54a7767ed9fbf8209666a9503d77be638121f7c05ada5a. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ede3e44-9a9f-444f-a3dc-b64707ae0eac.json and https://artists.proofprofile.net/proofs/artist/3ede3e44-9a9f-444f-a3dc-b64707ae0eac.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 0xcecb11af919d7e08b603db3c3ed7f086ca6f80a3a2a5c857e6e93f80640cdcbc. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:49:29Z), 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/TCJPO2157525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87badad7e40690ac12837b0db2fb4f1eff13d7ae43848c049e1e9b54d2a5e47. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPO2157528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864ad62b8e770cf098ff52b5173b5b7fd07bbe3fe72debbe78f9f7d61374f3ce. 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/TCJPO2157529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbf5bfcaf098663e7ce6f84369eb7550400b8a80d0fbec0322691c1b8497844. 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/TCJPQ2122593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf3c38db1aa5683661e700aaa10ffef5dddf2dcbce56fe40da2a4d8f590bf5. 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/TCJPQ2122595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5a65dc6292688a8fccd224d2f37151e53757cbb59e7c284860fd3808403a92. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPQ2122597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dd2467a485d84084e745799d30e95208b1fb581f128a8630cb609b7af506b7. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPQ2172778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d714c27410e14330693403e40d6cb1fab729773b705aed2fd3fb24c6ff5ddfb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPS2214135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242197c0ade52fab99b948d3098a0cac09cd6f800d02442918b2b54ce839ec08. 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/TCJPT2289419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfc66a19910f07748475a92482c8d307401858e4e2a04c54817c9c980c5c998. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCJPX2393588.