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 0x78f53e11e0982e23327f14d5f77c14132255a5db5f7f58d0f8f04bde0b4b2a9b. 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/0a2a0e6f-068c-4368-8b0b-d332c0c73a86.json and https://artists.proofprofile.net/proofs/artist/0a2a0e6f-068c-4368-8b0b-d332c0c73a86.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 0x271e52606a99b2a3de7a1431c4fe88379abf0890b9c1c72601710a8e985cc6b6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLV072500047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80166a15061257df7281147ca07c67f93a102b56df1e4c8ec88f60a73a568eac. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLV072500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d478487d137b18b2c05b0403866bef4696cb2de7443c32a0b6f343dc098a70. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:50Z), 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/PLV071900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f6acba0365c655712079d19408f2a680dcbe019f626f5dc422646b4a5ecda5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:28:59Z), 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/PLV071900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb311394dc41dc11652f9d6f30c1c0d3927596ef4b9eef742c37aa910c0028ae9. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLV071900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8934fdbaa6fffb6ac51c65e4009704dfaccd35ccc2ae0d03653edccbf013be1e. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/PLV072100105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975a8b62b9ede26c3d1d1d7fea0f043e5f66d45875bb59b9d4dc262ece2bb019. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLV072200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac801274d5f20bbb1c69b5001b6fbdac35e923d29b9179a080cad4a5be049a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLV072200205.