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 0xf3f92b948d38d805fca4ebd351d174f58d20a89f5896d9cfb0eddc0062b06a3f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/359ffdac-b225-42a2-ae58-26d35f229531.json and https://artists.proofprofile.net/proofs/artist/359ffdac-b225-42a2-ae58-26d35f229531.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 0xb68a1488ac3e5db0fdf18d27ef02b7e30e8eafad19d98de5c24a03f7a7af0173. 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/ING212317579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5545d0b473bf7d77cd1b9ad3bbe06cc5e80b4ad20b25c4c71873826e064d341. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ING212318240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf0c2f55fc33a72220d735ad90d84a95fe432438968eebdc09ad0661d846340. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ING212318242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f161a9bbbc415eae697d9858f0cacf2316ed6c65abc3c980287546d2da12b1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:46:51Z), 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/ING212318315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291252b607bf7dc6e57079d7caf7b50caa9ece4dbeb3c950cbbbb3979b89bc3b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/ING212318319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36aebf4d19082fa365f0e5aa8006745e5b114e045b9b27b9153bedd2f0e9efc. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ING212330555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185f22453f6ea80e50c16f02c666645d87789eaad30a93957bb9c0dbcf4ba53e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:47:20Z), 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/QZFYZ2557961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7371bbdb4de2374d2b18b96a65ee341c4103f2f3bc50c0fc73eecb7e172bac. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:15Z), 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/QZFZ22583885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a8b8050b1138a075d86cb3c569541c12928640ff24ef6dec0222a0987da214. 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/QZFZ62510777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739bd721a210367ebcaef2de0c0d117aa672b9e4c237d95fb2bbbeace1a3cc7f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFN2557357.