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 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 0x4d69fff0be060adce03fdc942e90a2fadc9239546c56e1abd337f307d96dc3bf. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97e2e3c7-b501-40f1-bf61-d2fc3d106a76.json and https://artists.proofprofile.net/proofs/artist/97e2e3c7-b501-40f1-bf61-d2fc3d106a76.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Focus Flow: Study and Work Music with Piano
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 0x32546a53c2c81ae45d778cea315a1b3ff6c9b8253bcafc74894381b73afff687. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZZ8A2470444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6ba63da58a492e3af25d6387435034f0b99b031a34cac3ab8985030a32277f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZZ8A2470459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26ecc76ddde5a37469f6dae5b0d901cdc0bf774e40280b461f09b3751aec593. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZZ8A2470466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe090909a726fc4f2484e0d61f16f87906b51befabc0f454e6ba39d804e996784. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZZ8A2470472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a6743d74f269adcc46ecdde80433ec6ecef924a1e889b02d2916f8df3a2b51. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ8A2470479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c9788ca3e93e1120382158ac03ad3722c3c5e82ed8ab32c90ed00025e79f95. 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/QZZ8A2470486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0378a9fbe5d88755a3ad8c7680e36d4cc5a3991b828f24795f9715c8a731371d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZZ8A2470494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d9e35adb9f60c885bd9da6818db0c68daf2aba0bfc90ded83c958b788bbb86. 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/QZZ8A2470501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28cb4e15284352b81dfd73d8e94b9034dc8dbbb45c5249a209615aeecb696f5. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZZ8A2470508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b21f0e4a3a98a36ffb01e3e8b080ddd9f77f2f11de0f4123b04c73bd910d46a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZZ8A2470516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb53e72687bb0540dbcaba72cef7c2052ec54720f7ace8ccd077cd7cce5826. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZZ8A2470523.