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 0x657f37c868c1a4b120132a2ac93a3a1e1209d4579ce29752f4e7664bdad1a7bc. 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/5be0f6c7-8447-4dfc-96d2-9fc37194c6da.json and https://artists.proofprofile.net/proofs/artist/5be0f6c7-8447-4dfc-96d2-9fc37194c6da.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 0xdc782f45fe8e93dc8035db98ce2274033ebd04015cc716c601b5ea1fd075036d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:50:04Z), 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/PLB232000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ed21c15e6dc126db9fb715e58ea40b60fc57a1bf67b1b2eb9d11a636187086. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/PLB232000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086eac0d393f839ddd43863830bcafabc176ff0cde86a07edc15bcfcd56324cc. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:17Z), 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/PLB232000053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ba9be8d50999f9901e96b0e1a5c712ec26e6f4e9a746136eb18f57a591375c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/PLB232000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9298169512518171e4b1146385a7e0162fcd1bdd2191f5f1b53be4a82dd6c6cb. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/PLB232000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa007f7e686a2ca0fff3cfa99f5926948aa9709c7d7b5fbd1d81fd10a87c6ef0c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/PLB232000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b4a44cfa7dcd53296af0bab13b29387cddedf9e332138676cab9355e006fae. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PLB232000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5caa8501b297dc9fcabcd8eacc9a6d243ac0048f59ac7ea720ff61970539bd1d. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/PLB232100071.