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 0xbbe452acbaf116c6a3e7f55923c27ba936c7e1140a3b535bb54f9bad58a7bcda. 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/02117dd8-c20c-45c9-8c7e-91a295d98c60.json and https://artists.proofprofile.net/proofs/artist/02117dd8-c20c-45c9-8c7e-91a295d98c60.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 0xf9ab4e1068c24c64f8918c7f75f13da04372286188443f224cf4c91a25a3717d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6N2122241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2ed54ba7cfa25ea6397d11b79a834bdef91e0042d42254bea8acd546c8d5df. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6J2114562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b9145de6f0109d9b68439a0f0c812fe9ae619b2e26497161564b36256144c5. 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/QZK6J2114563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac798f94561422a807809e80d3e0b32aa1b31faafd44ef539136a67b0e3d83f8. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZK6J2114564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0194d07fbab2bd446a82226565e50be894b2c1da0f27fc13d4d19918a77da423. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHN52234363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302f53150231bc786b753609880ae80e6a5af9465fb6357c129998cd7eae3e80. 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/QZHN32378276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a15d4023efe1dc75d3642485c0bc97040a7b23a593f38d0080ac7df6867c220. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZK6Q2332917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929060898e03d55cbe59487a4c40912d8037123e51cfef8c1d900271204e20e7. 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/QZK6G2359423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44150fc68056bb7df4354b8873df2cb0194a68f8d66eda136a836ef1e384e92. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6G2359426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7293f743640d113cf0fc97494f7e80d7352bf9d1f86c5976e06370bb641371b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6G2359427.
Ngày ấy anh tưởng mình vẫn bên nhau (Instrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86dabf7fbb1c505f8ea2712213f6fc59d661d6c91f1c5935a8a0183088c8041. 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/QZNWX2382700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1733854b807503ac518e1b4b14e5393b560c0b790a3827565e384011e61e4e04. 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/QZTBD2320906.
liệu ngày mưa em có buồn (Special Version)
liệu ngày mưa em có buồn - Special Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9867d90519096aedbbb6579543e1073d232aeae8bf1e87c3e730eb795f0e5c24. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZHN62495244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82273b93f8c0ae36d2db5745c8166333e7b8df9860d04d0cffafd0bf01ed118. 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/QZK6Q2498094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cfd2e6cea5de106c593ac7c5489f40d407a5c353cd1ac2590f244d40909f42. 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/QZMEQ2435173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc31e05c391f9116f694d85347d586ec4403c895aa2f6528d8718d95d3e394ac. 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/QZNWU2433964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e5bc1a16c7b52c93ec2703cb88a9257b21c91d0bce3cd3c82278d8e51ed3a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWU2435218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32ff94814f93ae0ae1324d67b04c5d4f7351829be5ec9ab9dfdd5aaad0992ab. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNWY2416395.
Anh chẳng mong mình có thể nói lời yêu em
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7f25181cb225843e43350ea9a6ae07d8a20b0c9885bdf98b34b72ba7e775fc. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTAY2445304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba809d099a677104a99347097ad5cf79181ca6dd251f6f6c148d238e4b631c30. 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/VNA0M1938212.
Ngỡ Rằng Ta Sẽ Tương Phùng Hóa Chốc Lại Là Biệt Ly
Buông Tay Em Là Điều Duy Nhất Anh Có Thể Làm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aba606977c0b688ddee1b6b169c0212bd61426a47f6c3f47da6955e13091b5d. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZFZ32579153.
Chẳng Biết Ta Đã Lãng Quên Nhau Từ Bao Giờ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7ac2a34dfad5801319c2aa104af2f9a0522e4771d50fecfef0dd3fe27c408c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFZ32536471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c96d341536fc99cdd489637eb56b4a57a8b49ef45c807345a3522a92f853c6c. 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/QZHNB2524786.
Tiếc Thay Cho Một Cuộc Tình Không Trọn Vẹn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83155082bbb556a60bf7a4fca8ffa6a3fc3bf21be783572022d7554ba248afe1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6F2555785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87678f53a0ce25110596cf3e3ebe0720bb1f45ac9683644921b9c8a34e636602. 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/QZTAZ2589951.
Sẽ là những chuỗi ngày vắng bóng nửa đời sau
Khi chiều tàn về bên ô cửa sổ (Special Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e31c577f09f704b1c018e0d0a128fc5bcdb20e3d7c74b934036a4c100e295d1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT3EZ2507179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8eecf4834262f34d784c6ac0b2587164ba008d921cf7f3a64ee67cc07fc394. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QT3F92588522.