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 0x7c3826bf901da1328d5a615d612e9dbbd478356bedcd083946b07ff27487647c. 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/bff220ff-c954-453b-b654-108fe48d8773.json and https://artists.proofprofile.net/proofs/artist/bff220ff-c954-453b-b654-108fe48d8773.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 0x416356a803d29af839db0ce19d9d4fb29a3b8f9c0f719bd70453d04816f7e52e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DGA0L2385775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25988e146dd50406559939ee0ab61012e9892f8c6de68518cd7d095fb25d3d6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DGA0M2489316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767a330a324bcc33e1d8ed7745f93486d47cd822cab8918070cbbbf3921c2d2a. 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/DGA0M2426705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302afbb4575720936e44aac449835607fad1f84abca02b1c23afeb7297cfec10. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DGA052497246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4320aacac48a140baabc2091e1a94ca71515431b3e34e2b02b5f5d98a8e93b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX762449399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9339661e0ff8f39907e3658e014acca50c2586005e6b4acc6f9f781e8e14a4. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FRX282461077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063e89c2ed63d6195fe0ff7fbfd0d245d918c81bd39b618e320ce775578984d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR59R2470797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16363dddf6c84ab457902fb7a5b4483e4831d40e0445d047c7af39e49e000d1. 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/FR10S2435217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c332de8f0ba0a959cea15e92fcf21a630337c9a156721c474e9a7976050036. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0R2346867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d96a0fabec42f9c6f952d32b3c7965abbdae65d6b26e384c198e32da18c694e. 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/DGA0R2346869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76b8bba85fdd4c7418cb34947662d74bb49dbcd6ebd4072c2c547e74d3a4d9c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0Q2384259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c785a7d2b48da238401f206bc43795b088727ae005007c0777c874f12783b3d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DGA0Q2384261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54016ad4e9d7bf26bb4732632c3714e5e37de459c4ca438259c8182ce1704131. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DGA0L2350256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c016b9810243493af3db5d9de4c8a43c9f4c95ba448616d8567819ba38c99. 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/HKG732149224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3039fa74ba589572a0cd2332dfc605396601d89a11cb744e72522932ad681a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKG732158587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7e08145d4b11b51ed514e8f8d20b1e8583917253107972afa476aafe09818d. 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/HKG732147729.
留下的幸福 (抗击新冠肺炎疫情一周年纪念)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bef0d2e5c83bff96a77a9acaa461a4bdeede01b3e2fa5b23184d4e63b1eb14. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR10S2542343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe251b65a6a535dc608e02e15c15c13577f18e2a166293d5813a5e63714b9c355. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DGA0T2446772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8333fefa31bf68e75ebdab12e6fa944699a767d274ccd33b8df654cf9de874d2. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DGA0R2451951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeabec03de80aab4e055da5db41c660d5970a4c993f87e05dd13b843950661ac. 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/DGA0R2417264.