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 0x5579d11c2eff1f5cefae4beb1c1c77e93ca92df01f8f746930c619c5e2abe26a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9891d5d-006c-4162-be8e-7ca83d3a1728.json and https://artists.proofprofile.net/proofs/artist/a9891d5d-006c-4162-be8e-7ca83d3a1728.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 0xb83ed7676ca69e39f86f001849096e92541dce18956cfbeb216fcded03359f51. 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/GBSMU7571201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735b08d1d290b87b838f5a9132c1f3ea34fbb1a681e4123a479cc02ff8f840a2. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GX38U2176752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4419f768232b42bff5a4c3c4b1f697cba04d2e6a98e10065e592bf4e092ac922. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GX38U2148511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de44b994b00627ad18b6e2de0e089bdb0a96d6b04ef9d9f9e9e8019e590f1d9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GX4R52179910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa080fecc06303760a05b3b7d97a3f6fa15f7d15f99fd4b0a23f086bd0c1202a2. 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/GX38U2230383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0ec02772ba95751961bae4b6f558704c64481bb1d33fc345fb0e03e642ebbe. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GX38U2230385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e6d002834bc33060e69e5b9d40988ea532b84e6cd5e6170fa255ebc6ccb70c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:55:02Z), 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/GX8LD2257583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f978411186a0e5d6f678e094a49fdb730de21f38316ae00866aaea49f385c85. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GX89G2369799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1712df200336e2690b15d9bfa81f396338a3a8063a1d46cd4f896080de3280e4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GX8LD2338881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c216008e1e158398ff000a18b65d1e155cac8a0cd64b0e06e9b84079f06b01. 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/GX38U2342460.