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 0xec91a9273ec2dd93527b4bbb584f193dac8520b9561b52176e52b1a76c5883da. 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/8ea48dd2-6ca0-442d-a3c5-1c2cdf465775.json and https://artists.proofprofile.net/proofs/artist/8ea48dd2-6ca0-442d-a3c5-1c2cdf465775.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 0x7eb1270bcb451c9ebf4f150da8f94f5f1a452d41457c580bb549e3b4d1b5827a. 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/TCAHD2322172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022bad15df8ba17a6a41de5393c122291ae23ba05069a9a0ef40ff5673ac2ff0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAIR2422361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4257ca187b8f8729e9d54efb17f4724c674bd49d0704bbda4e8b682d493b740. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:17Z), 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/TCAIS2422181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498f37c8d90f89167015048155f972447d7188d4a3a5c1403eb099d2f1d1513. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:50:17Z), 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/QZTV32535554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c6394f9c538c97e3a892dac01375ad6a8f9e0336bd65adddcc0c999c5a982. 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/QZWDE2506874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191290529aa22f384dbe85f1479afc897723eb4c3d931259134779a1fbdadc0b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:45:10Z), 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/QZWDE2506879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4548457ef55c6a298c7f1d71c400b2800ecdefe5acc32bbab81d5b33e18e0e89. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZWDE2506882.