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 0x3047ad1846dc99a74a14fc4844cbe25a687d8c818da3bd8aa4d998096616756d. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a489296-6e1d-444e-8f45-66b70001f76a.json and https://artists.proofprofile.net/proofs/artist/1a489296-6e1d-444e-8f45-66b70001f76a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cổ Nhạc Continental Số 24 - Về Mái Nhà Xưa - Mưa Lạnh Trên Đèo
Người Xa Về Thành Phố (Dĩa Hát M 6885-86)
Chuyện Một Chiếc Cầu Đã Gãy (Dĩa Hát M 6869-70)
Dĩa Hát Continental Cổ Nhạc - Hỏi Chuyện Ngày Mai
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 0xd9e869879121aadb469e0c8bfd055887dde83ce5073c1672e315028c2fbd7e8b. 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/VNA0F2115937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749cfaf86e158c46e394d6c3257efdfd28050d76515198b0153be5642cd00657. 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/VNA0F1706792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f745e5181740bd6adc1cc543a6d3f4ca1b2c9922950b31cc0e3b0c3a9690ee7. 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/VNA0F1706793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab958fcb1652e5e493bf764c22d6560d2c171dd49f605d4da1376535a6aeb59. 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/VNA0F1702453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67839b7280171bd6ebf1240c446726060c50efe1687effc315190f892d3223e. 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/VNA0F1702454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0de0ec206bffbc92fe497dea04a93fd1c8bff2d4f04a4c49c518cad411a8ed0. 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/VNA0F1702679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ee4a1be7eeab7904aeec461ff0df49a7e772d8a9fec165855f7b99c8ab6254. 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/VNA0F1706875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0859d554f6df9eaa1684db661c6864528387a113dee207d01acca9282a1289. 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/VNA0F1707673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c03dca9f1a0fb026ff3398f1a11a787581fab5cea36650fdb506a1f4f9275. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/VNA0F1707675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929dd867e0716a09451411a15bb1e86743ab05155c0c1a862defc110adca0304. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/VNA0F1704918.