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 0x88d093addd5875608c3b3a0c326eda1547990b26b2a9794204703c796f989c14. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4786997-9d7b-429b-bbd0-1bb7b3e470a5.json and https://artists.proofprofile.net/proofs/artist/c4786997-9d7b-429b-bbd0-1bb7b3e470a5.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 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 0xf8aef1b7f4488f48f0f68a9ec00593cd1e45816f813ad4d7994ddc0fd34db8e0. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:50:42Z), 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/QZHN32226215.
I've Got All This Ringing In My Ears And None On My Fingers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7cd478a265f44095c4d8f58e2d1e04c9778f045b01a25a82365cd1347268bd. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTB72239072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf631c0b91957c231c4ff6ee76c82d8f5c05ec9421c2930a8348429285f4e2206. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTB72239073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bf6681c7829cbabd2c9d2427e19db1e14400fc8475d03ab6b9a93cf250829a. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTB22209985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e10ff44257c8f76476c2b161411d24da072db56da15dd73353279d233b585d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:55Z), 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/QZTB72239077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67f4e90810fdad762c61270267ea9d513dafa57f5e40d795a71ba9a83177511. 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/QZTB72239078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63c47bb859cd5fcbeed20748907d57eb2c3b2f72f4f65cea6d24986ae525486. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZTB72239081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77936620c390a52197f7661755f05850168778336f86e7f38afd8f3e75c02528. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTB72340278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ddaacc0cba8028dd91a9178b66e151cb8903d12b6585e4ba12088765058a31. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWQ2476052.