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 0xa2a5c1948341211d595050f7e0f8eb59ee110a842b18841bd31ac1e1f9c24235. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/549c9c78-ec65-4716-930c-9dd80821c458.json and https://artists.proofprofile.net/proofs/artist/549c9c78-ec65-4716-930c-9dd80821c458.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 0xd8601d85a88a829b55311d4a47a9f7a5e3d8acaed8ef0b43ff043092b7a55afe. 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/FRX871510946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c4cb90bfe85c8c0a8aafd251ec1e3635d10ca3d8b87233103b3ba47eda0294. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX871510947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1249895bd091a0fdc2a489064e2aa2a12bc7b517093fae87e5d39eedab74b2bb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX871510950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87828aa5f3cd83d47ea927e6ae44a2f856b90765b530ef954ea35765e0621512. 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/FRX201628236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adcfc4ad97e81b62a0db5256f3b21ace882944c564f327f9badd6f6abbf3da4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX201628237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad159f6776e38114618f9aafdc5f314e4fa85ead69715489b937b1aabcd6c46a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX201628239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878a84b4e38bd7daa1f61c241bcf96a9b86908448b3b15e457186f1fbc7fed23. 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/FRX201628240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b2fbb48968a3e33a96c2cd135d7339e57ef24c56e26e865825d9e87eff86aa. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX201628238.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce931b2a3c4e2b9543e214626c0bfb27cca38bf4d600e30d2b1374f6e411bd21. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/FRX201628241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6141f0e10870e916249eb45be5a4b0d105643478b7c5d5e6713435006e020d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRX201628242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f7c94e2451811496b3bae8ce2104a304a93ec66a56ef4bb334091d6a7f3b4a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1793371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09f260beaf8f4bbd7a72ad7d7191ab47181e09c92aaa2124adcbd5db172b89d. 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/FR59R1793372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377ffba4999ed5a1b5ca94ce478bb9e1cd3acbf59aa4d4ab40d6c99dde25c53b. 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/FR59R1793374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf2f0099006aeb0cbf7f761960fb93534c0a51e9ac9367835514141a720e46d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR59R1793373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ec1b58f547fae2af1187d227e0ef811a1aba0863c90eb4ff5f16f2f5160bf3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:46:41Z), 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/FRX201774673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1795d2a1bc23ba09b8e125bf2db946c13d2ddbadab523657a9304ba8a329ee. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:18:23Z), 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/GB6V81220203.