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 0xf3c99d79fab51363eb6e22239c74d3fcbd612e2c54a61ad650266b97a87cce13. 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/ce835433-001b-45ed-812d-83a8bf5c9120.json and https://artists.proofprofile.net/proofs/artist/ce835433-001b-45ed-812d-83a8bf5c9120.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 0x6560cf99c9a265f6a38569bc81a6f65546083ee176c7c48e2a6a39414d84c638. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USX9P0609668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc313c735430f11fba0b8d0fa8b4f56bb027b382b80b245c44c2b5516714472fa. 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/USX9P0609672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a386ed68e9caff9ed95b831cf5bab069bc6f67ce30ace789559c37083683f5e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:39:33Z), 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/USX9P0607120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dae88117111ac55e1e3de2770fae0e186afa91f8a2100d40b21237b7904aa0. 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/USX9P0607121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb017c0c78d36c94a1b1a15a56e1c20c27e5b82ca04985e41d465b6196f439f2a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:28:28Z), 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/USX9P0607122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714830918e0d16064002efc0738b26421e4d4f531454af1ec2ab10a5312e752a. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/USX9P0607125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88c760b45e973dc2b74352e96e4fb1d513a50a02f1e3f316bc3d12ffde5b497. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USX9P0607128.