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 0xf2067f93dd9ae1424ea7a9f22ba61bc92cf37d92801653f74b46f5d7f5e27f3e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec0aa08b-6d87-4ea6-9e88-6d961c473ce9.json and https://artists.proofprofile.net/proofs/artist/ec0aa08b-6d87-4ea6-9e88-6d961c473ce9.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 0xe46f11d436e917920958e6eb8831c9c9f61c2da1d70584d422c164c52e32db1f. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ART9E2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ee56b0cd781263cb7547bc408de029efde635f812d8211f76a3405c0ff1881. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:18Z), 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/ART9E2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b77c6d3d110758e7c4e2c4114f283e09a52c38a9f5a6b234348d54ce3e7d47. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/ART9E2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65305d2be620fc9024938fc239a4e80095fe85e2870119d0134a84f7111c411. 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/ART9E2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66743afa2b97c7765dda490368ca4a74ccf70328bcb9c9106bdb146438c0d4f. 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/ART9E2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51c61e9989f022d0ed9f7b8dc7ceaba3154bdce1f8f2c3e47d75d12725db6e8. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ART9E2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d2d6e99cba09377066f43e3dfff75ddcaeaecab6eac20d2af4ed160580f75f. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/ART9E2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9d78bfe1862b9f1192f8a84a995edc5985b3c11cca35f481e33535b4b9ea98. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AR1RB2210007.