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 0x2fb666b7ccfbace23ffa769bf936c4ad4edcb2cd149ace4153aebc8e2d570c30. 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/bd354f4b-d3a2-4a24-8333-e1146f95c416.json and https://artists.proofprofile.net/proofs/artist/bd354f4b-d3a2-4a24-8333-e1146f95c416.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Hot Hits (Volume 1) [Piano Version]
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 0x2e8db1c88a4e46f3fb0b4a808dc8389350a4563ea57bbdc2a5df97cf855a761d. 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/QZAPG1719072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac0f2a8968d05941ed29548160d8685c3ddfd1c2f67a8ef1dacf65b7766a394. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:11Z), 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/QZAPG1719074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51978cb8963ef318f66419ad7888fc387270ee06882b89fbff78583e7dd27df7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZAPG1719076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865cd9b36c2ed701ccf40413baf436086606a56903d7f2df7b15d89597977143. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:52:25Z), 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/QZES91997602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ece967664017df25dda5198e672dc3513797c9295282f727e756a5cde558df. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:10Z), 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/QZK6P1984611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac229f109129bfc3befbc86246d84fc68de296a7f5f3efce6788126095c969f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:41:05Z), 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/QZES92029608.