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 0xe20bb456d44da8ee8085524df907dedb078f0e72bb01cfb878833563a123239d. 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/01097948-d8fa-497a-9112-c8ace163bf77.json and https://artists.proofprofile.net/proofs/artist/01097948-d8fa-497a-9112-c8ace163bf77.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 0xb6021f19c1c7688d6d5b74110063fe011e1fbb2dbd7a153ac7afc7936b542494. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNWY2109151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3571a257ee6da8b256fb43e5c8afddd810e2744f28a7ce73f29ebb44e9e575. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWZ2193434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c74ad9e35fa19209a1c08c37d4d1d1a9f66e5e3738e686ce91813e1bf67136. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:49Z), 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/DGA062368527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60762e3940ef21c3c03ea7f809e51aef912b739d58e425bfa418f9ba4015df7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR96X2386378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c74ad9e35fa19209a1c08c37d4d1d1a9f66e5e3738e686ce91813e1bf67136. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DGA062368527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181971f742eab70d60e18875617f58526b9329272f071ddc1a20d339d402ede6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:50Z), 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/DGA0L2341637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d109335ab91c9c839269b65eb93a14639f62982e6c9ecfad9e6bf6b70e313. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:16:47Z), 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/FRX872570708.