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 0xd15baecd3341033a4a38a6823f13b252a59ee006a206f5254daf21797c6eaf00. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abf9dad4-8ae0-47bb-9969-b4a5c83df953.json and https://artists.proofprofile.net/proofs/artist/abf9dad4-8ae0-47bb-9969-b4a5c83df953.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 0x05122dbbf2a3a88014e6406d5bf1fc8ad15c2847aa7f3a9c228d3918fb6be308. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/US3DF2046500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225f40541d755736b90d0354d9846fea27043d488d87292f066e9518f736790f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF2075135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb707437c7b95db42b0aa1e473911da4981221b4982c23569a43bc43807627c10. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM3DF2137798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04281aa7c039789a6059d525ebc8af8bafa756c1e8159fdcb87550669ec84a01. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM3DF2137800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc715c3488d36cf8a88396ac52accdee5421da1b293b16758cfd8ab43c138cc2. 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/QM3DF2139469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646233da2ff7bf65c909173da6e81e9a7ff2adfe8f96cafce0467b85d64701fc. 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/USANG2206687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646233da2ff7bf65c909173da6e81e9a7ff2adfe8f96cafce0467b85d64701fc. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:32:01Z), 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/USANG2206687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8da76d67c56152a396aa0c975210c88f4845fe3b3b84f8209cd63099f237d6. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AREA12300968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10979e919027fae592ac8434241ac7db5c380f248a419317bb1e13dafe8836e6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USANG2181270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dcaa9f56229ef008ba240d7f2a8c372094a53fc9a1f6714a39f8abdc80283c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/AR5UH2301005.