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 0xe634c728a10f013a95c00a392f2d2cfb89f9ea39b07cb422511b6ab976627032. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ce5af31-c7a0-46e9-b308-be65110626c9.json and https://artists.proofprofile.net/proofs/artist/1ce5af31-c7a0-46e9-b308-be65110626c9.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 0xc3f31fe01664adc422ca1d754a1767251379fa59fc149cb5066d153da5a75c56. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6P2534954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93ab3ff70d37eccef5a9fbd377f0f09e5582a36f1904d14a300447358331b0f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:43:59Z), 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/QZK6K2566328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341bfce531f1a443e4a697c41fdc83165917ef5e4b76698b96f194b214267e15. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZK6K2566332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6274447282d3ef45ebba38e047fcde731ff9533fc400e0a97b72bc695ac2e21f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6K2566336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cea3cdcafa3636c602bb0a9f2447e5136980cdbfdffb4a56afb82f966fa0bfe. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6H2595861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885fbb09cf9012bcbc8093f4e8dbd3871dfbffc7f3e18e9ea63053a669635e0c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6H2595862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6269735cbb6f2bcd417342b1867483dc5f8ddcb9f36e6b7165d3abbd4a2f4d5b. 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/QZK6H2595863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d551d7f81e970fe80972483c5d2385bf24ca859d502e772a2d7fbb7072e37f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6F2528348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa559573c053de59f74cd2e73c7ff455513d60ec6b314ba47a17f3b4473643ed1. 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/QZLBC2507351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e181a4beb9b0587991e90daa342c321cc67a1f6efd634308ba05a46dfc9f5b. 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/QZSYP2562349.