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 0x83c8b8438a7ba7f4a2c75f1b882e0c9f86a1b3f6920fe50ebea608259f857d02. 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/20d270d4-1e81-4025-9f12-756601a16dd7.json and https://artists.proofprofile.net/proofs/artist/20d270d4-1e81-4025-9f12-756601a16dd7.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 0xefa2a9c98112bb5aa479e76f7966075f28f8e2a6f2de3632bd45c249909c9b4c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:37:49Z), 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/QZES91991721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef30780acb52164f01e71db158e2840b64e4a521d430f3921ac32b333869081f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES91998620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7496790755c326b0c4adff14ff7be72f8252805eab7de7a2fa5ebef78c506479. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZFZ71922551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20fc4090702a1ea2ff28ddf308b0cc70e273cd7cc2c2af5e20e4e18d51acbfb. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZFZ32016427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00dec6fee848d541b0665bcadea9ec1845fc0e4ff925b17cf46731599d88861. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHN32076193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3924c6f3706d96e2f0078113972cbf22a34d1dccd735d821fbf478eadb5fc09d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:13:44Z), 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/GBKPL2164031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e8fe7719d5a15bc3260b12f669bad761d3a2515965c34b332716f9772fc30a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBKPL2163269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71804466b52d36805956372c4e8f9ff3b51ba4507c70293eb44e8834e91b8067. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QM7282495242.