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 0x40f8ad5c54c0bfabd71db0460f350fe253056868bd6199831f5322601d5e5413. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cbb96fd-d00e-4a7f-a5d9-b35ba59bcff6.json and https://artists.proofprofile.net/proofs/artist/3cbb96fd-d00e-4a7f-a5d9-b35ba59bcff6.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 0xc59a9d66554f49da71eeaae903002bc2014fced37fa78dd5999b9f778a41ae69. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:42Z), 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/QZZ7Q2454161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627966228e70b106581a74bc2d318aae67b3385a9b5c98145a496341d87654dd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7Q2454163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea4fab8233efeaeac3e08b7cbbe63e634e367e8d83badfa7710cfa2fd5378fa. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZZ7Q2454156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf62e76a0a83c2d48e77eac978562c0ae5cdbb11531dea83c32ee6abd51e027a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZZ7Q2454162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f8db968559234d482de045e28af16c1af031d760585b8a7209ae29011b9cc7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7Q2454167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf5b64103ec7a7a79bfd0b6e4db27c94eb6b66f1220d845b7324fdd000f4932. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:36Z), 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/QZZ7Q2454160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8a620f161b26d664659dba9a94aec5e74499679a955754a300b7a2af94f5d5. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZZ7Q2454154.