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 0x32124a680084c351260ded449aae543eb0446653f25779f98601b9951a1dc8aa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1e0a867-a621-46c0-9b62-ea2495b6167c.json and https://artists.proofprofile.net/proofs/artist/f1e0a867-a621-46c0-9b62-ea2495b6167c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Hanging Tree (From "The Hunger Games: Mockingjay")
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 0x0962c1cc8ac74509830118bf4310249886f5fc33440fe94d989195135da56549. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEU901501586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0524da1045619fce9f2dfeb564b03f6d7ac81c3aabb7925c086110c2a5f02766. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEU901501584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92364e3e4da33dd02cb2ac0ff4b9d24f8140f6e0dfe70793b56fff793e934bc0. 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/DEU901501577.
I Will Always Love You (From "The Bodyguard")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30520e7875cf4a41d90f6aef39133a9d9cf71955569165c3467de05e18b15709. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEU901501573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e171df00d65b87a609485ba7e8140f50b4c26fb460ddd1b8780fabf4d4b35e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEU901501572.
Raindrops Keep Falling on my Head (From "Butch Cassidy and the Sundance Kid")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d51a56ce7efd31055a3ee38e7e360e636014adad4f91317aecd48c8d850767. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEU901501580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b76e74740b1578f4e00ab722628d4a34987b22cb2a0e2ffce30db29925b7252. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEU901501574.