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 0xaceaf86ce16f0a51e7552b521a6eff4656d2fceac2197618a38de258ea005649. 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/81266e61-62f3-4b55-99e9-a38c0ad40954.json and https://artists.proofprofile.net/proofs/artist/81266e61-62f3-4b55-99e9-a38c0ad40954.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 0xf63231f4f2a9231adf89f9eb70e7f4626beae5e828c9fb9359f4a1b174c84a54. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZYHM2370643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb376735913ce46f6492a0d9d433a6076624149016eda5ab392366e85eca8256b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/KJKAW8680823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df30bf88dd0df8bfd7aa173a72f6481b0b58ef364e6ba0d9ada3449a25c1880. 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/KJOQG7634603.
祝你比我快乐（即便那时再怎么无奈）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c248875aff8fd0ac39df5d0c95b4eba369d97df781b22858b473a09b828e47. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QT3T42423412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19cb80ee273059417db086d5bd842c50e02affe133f833ef87951444d6ed86c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/HKD012362526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bca868875bfc0b5ab6b74a9170a46e6f856322eba3260187368ba4b9401a39c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QT3T42400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1f28ddc312519f0c5e5557fb04c8b37e3191849656e2c971d51b8314206b8e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/HKE022258226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1350b3e3c2bdf607e95987742ffd5355bf516270d6387ab6fd767fd1cce54fb7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/KJGV13824202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe305408f33095cbb63f6f933a857810ee52e6d88611c8db52ae3b47d3af75385. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/KJLLX4379222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecd56ea433b1d0a78dc37fe68de460da7881d02b625e09d9ff14e7d9e60a010. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/KJE7S5136546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c871c5116a3b0293c5be88904f54d18dc337c1dc983add537ecbe513d8c4d0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/HKD012363752.
秋风经过陪我过个冬（等秋风经过 落叶已成空）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6067b96d7aba8a39c6ad8e4a913fde293c08319fbf978db6c04c86256eab3976. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3T42504929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63635816343073086a7160826b70c4ffea4dd6795069b4348f5911d19441548c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TX2594034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc009601d3f657a76080605a8c74b14514fa14d657510fdd80c4a21612a2396a2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/KJB747579262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2909fc92825d2910bfb876646ec2fd6af716c87a754121a999e841db3378f2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KJFYJ0613279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e15626dcf934cb15548bccff14f02b0187efad53d7c99ede1f4aaa97e821a2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX452523256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1170faced7584838af7d8d0dde988c05a90b3d7aa0eb8f0728d81ead1f173d0. 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/HKD012561487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8c136ed40a6d1bfbe0cf8c568ced4660e724ee28d07d66fa5f2c1caaef7089. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HKD012565683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63bf38a000773ac114097f19654b2f658b4eb7eaf27fc44390e3555a118baf1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/HKD012615093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adf11956cc10a2f6ec9b4525875331b2e1b7f948aa8725eb7c73381f41c1fd6. 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/HKG732492750.