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 0xae0b0537c3f78ed80458add7b1d38a30454f074f38da59ca19aa2599538aff64. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/feca3684-f3c7-4c0b-bcf7-b32fa375ff2b.json and https://artists.proofprofile.net/proofs/artist/feca3684-f3c7-4c0b-bcf7-b32fa375ff2b.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 0x9dc0332787359eeaeed79355acb668e8d83d40869dfb905c7a7b5f4179528b69. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDY42013652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072c8a55cbafb7e738bab31bd7740fdb407061059de13a5bfec7ff1fee71a010. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:56Z), 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/QZFZ72163528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4128d2d702e6d5fa8f36934290ec9f2a456d43bb234956c12ef14618fbed0de3. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:33:10Z), 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/QZK6K2141752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e79215ec1f1a88329223010c4e21b41b6704b5adba0e1396e3d7bb2b78ad7b. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZNWW2148982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a1dcd8c5917cb9e5d74ec104954756aba0f5c71f6d3ebd8c9f6d160f4947de. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZES82396511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a7edfb6defa7068960f70dca3d0989e686cb80f8bfdf8374e57249468cb683. 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/QZK6Q2334067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2e0ae06552f44a9126ca471ec6f9e61da8b64b437ada3d4be50de9895ec066. 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/QZWFM2378765.