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 0xd543eadd4fb14991900ed7e39c23ac00a3b19f41947937be46a8488819bb6db7. 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/9f5f0e57-3e99-44b8-9174-0c9a99d8ff1b.json and https://artists.proofprofile.net/proofs/artist/9f5f0e57-3e99-44b8-9174-0c9a99d8ff1b.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 0x063961639012c4db6a8d108fca6557626f8337706fe4694a34ce11c5779f4bf6. 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/BCKKP2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e59fb1a22f6502327c594872117fdb7818a1a86a77e3d06d114490295ac999. 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/BX2GL2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9f8e8de199f8eab9cdd40573c4bc54785109a3b23b742b67b217b93df845c4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXG6R2301087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e4d6db2a752fbdd2e1309294a47439191442b7cd974da9ee7ba2133a226361. 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/BXG6R2301088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2ed6829309ed5058efe9ef0b2a70083b7e54ef9fbb58128cd9a8efeb670bd8. 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/BCDMP2300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae05aec6b2c20bb524cb1548680019c23d50e896eeb69597adca6bb86395d8f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRRGE2200984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e9e8f2e4560467e6fbf3ec683b4a25c28342c41f1c3c1eebb8c4f709ef099a. 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/BX6Y62500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031c34b628c9f6170fed7b0f3bdf7697b94305462ba4cb8290eb0608c4c3596b. 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/QZ5FN2597405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82eeaf2c2c338d166576a6624245cd6f57a4f4a128176ed740b70bacb71896d. 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/QZ5FN2597435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82eeaf2c2c338d166576a6624245cd6f57a4f4a128176ed740b70bacb71896d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZ5FN2597435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031c34b628c9f6170fed7b0f3bdf7697b94305462ba4cb8290eb0608c4c3596b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ5FN2597405.