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 0x285df3bade5587cdc9b7b4cdc76c61e0081c1f430205207493ee51e3648c9332. 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/b15df152-6244-44cb-b476-02e9b3d5bf16.json and https://artists.proofprofile.net/proofs/artist/b15df152-6244-44cb-b476-02e9b3d5bf16.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 0x5f5316c113793ec64438bb48e6f25d904e72b077a080febe5c3fc16d3ea17f7c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:32:51Z), 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/QZPLS2478376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e32e93a0969a7280415ba06660d2f4e7407b32081d7a6b12e2fff070098079f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:12:48Z), 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/QZTAW2452474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a84f7e145b97f13171b6d430689c685684667c82a9399d7b89ffe5c5191f949. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:03:53Z), 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/QZTAW2452475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91f2add2ddf1ebd2d727e32c962ad451ca10b18ecd4d0cc3000ace1cf64d3fd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB32419186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67765eddc63a6a2f790e9386e86adfafadffd89fd4f1c19573b9058d1c295c1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTB32419187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa11a2161f3fc3eb70248701e903fc5833fd09fb3ba0f89382fdcad73576e9b0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ782452632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db456acf425cea9cf6fc42d59860237aaff9b9ed9511f61067170361962a5cc. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:39:50Z), 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/QZZ7L2446664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31c4fd1d69202b6bd042c73122afe701da2e17a187eb954eba5bf2c7bb7a6e8. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:34:13Z), 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/QZZ7T2445521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df990e1a385e0d4158cb21f3299e0c59bd5885b3f8dd576d560715ce629817. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7T2445522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904ee0b9e0646657b40cac3db6331bbbef21b51bdd45a30542d54d6fdb84c22. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB32419184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96640f683ebbf4963c5dfe18430e9303dac340e256bac6dd28f2736951dbcbec. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:23:27Z), 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/QZK6P2582783.