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 0xc17235542009ed4c7c4d6a6c171635c6dfdbcc9e3d005d6d932ecffd6785cb9c. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/752c7848-7388-4b33-b587-c3182b86963b.json and https://artists.proofprofile.net/proofs/artist/752c7848-7388-4b33-b587-c3182b86963b.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 0x69929896fb1568d38d129efa58e89a930f7408ab4ac1740151ed4ac9015e916c. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/QMEZE2069679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbbb895c53b9a2b588e99be1f844dfae0cd06413199aa32d9ac312880479c7a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:51:40Z), 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/QMEZE2083376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5936223311fd9ca472b78e9b56d8418f9043893449a0704b27de5dc9446d710f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QMEZE1761284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b2825a128f009403ecedeb674f6f1e5470ab59ef4456f73b3c71d00350eccc. 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/QMEZE1761288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc246fa7b76cf2db834ab361e64b9aed69b5d24cfe3904cbb179ab19ffafae87. 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/QZNWQ2039457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095bc1884e70cc6445cc19868f63984d97e5557dbe712b1c890c2465f521c825. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:10:11Z), 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/QZES72269437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b94a2e57e30da23e370827e0e44e32b91557a1a4176e6050b4fd5ffb605d6a4. 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/QZPLR2516021.