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 0x5c0b4e1c556c7770e74508a2431959aa14fb784f798b18913b5f3102d942bfae. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5308d7df-442a-4454-9520-6748a1a96fc3.json and https://artists.proofprofile.net/proofs/artist/5308d7df-442a-4454-9520-6748a1a96fc3.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 0x0f21cb69b083baaf8e3c69eeb04db3804fff42025c388eb7f7e84e253d458fea. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBLFP2023325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a74c796209010936101abdf319ce92b23c44bbfc291cdabecb88299c926a93f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:13Z), 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/GBLFP2023326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a66a16aed7bd5ec1b566e58973de4a5925a39bd68fae1c56de52a8ad25bc6c. 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/GBLFP2023329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc87f23fc892a052c009fc754221e3ea75e87b58eb736e4e27215219d0a0df3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBLFP2023332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98984dddbb2dab11c11783db91443658fbe7c51bdc577bf17f940793f6c7e9d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/GBLFP2024055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4e333b7684a2fadc3aac4e2f1741e04cf53a76f47190deed729e9d055ffc8e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:32:31Z), 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/GBLFP2024056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d5182f227c70b76926624af206809134b1bceea28657ac4dd5945db09b4a88. 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/GBLFP2024058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776eeb34cc9094ca27fd9f25db0e442df9ec127d6a3dbd3e894826ee2e97388b. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/QMBZ92002792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8000e99f6fa179552fca63e3b6f691924be843fe9fad173c40a09b676e570e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMBZ92002797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00e6878d33394004eb7e23ca094c8ba4d1dd136fa283e5d711c263d9eedf6f0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMEZE2197548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00e6878d33394004eb7e23ca094c8ba4d1dd136fa283e5d711c263d9eedf6f0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMEZE2197548.