1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f40a1b78f7c529af3c693d758cc829fdd1c1bfbb3f3e821a1e6bc79d6c3354d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9cab500-8856-4d4f-acd9-a61d89692329.json and https://artists.proofprofile.net/proofs/artist/c9cab500-8856-4d4f-acd9-a61d89692329.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327ac70b2a0f4896bf1b579e6095ee360a8af5b5de96cec716d450677de623f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1OfmKifZjSv4hYpn2XzHmy.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1OfmKifZjSv4hYpn2XzHmy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2233ab979b4162a7194ad6141cb2484183008b0453d0e2c619af12ace6290e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5gdK2KqJe6FpKjUfHM98kB.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5gdK2KqJe6FpKjUfHM98kB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd01e89b01489ad8f5c4f90114ee3cdf3b3653c07895b6473132b951f81e92b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6zgzdah4QbDy3T4BKkjZhU.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6zgzdah4QbDy3T4BKkjZhU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f9a8edf83300b38a4b5535ed95f8297b8b6762f77fe0e0e752e53117750b36. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2n0jP1AyLtWiA4kTGf1uTn.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2n0jP1AyLtWiA4kTGf1uTn.
{"copyright_id":"0xf894e2b9be765ac03456aa87f806c03b40fa37f5ae9b15485b2df17bdc18c624","isrc":"HKC992322303","name":"Never Say Never","registered_at":"2026-06-09T19:48:47Z","spotify_id":"2WhmAUL2A1alXac2uCTBau","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf894e2b9be765ac03456aa87f806c03b40fa37f5ae9b15485b2df17bdc18c624. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2WhmAUL2A1alXac2uCTBau.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2WhmAUL2A1alXac2uCTBau.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64af3f1084de0775f80c457567acb7180af95fa189ced5bed037d05abc6f224. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4BEltAGEqpAGiZHakYyRE9.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4BEltAGEqpAGiZHakYyRE9.
{"copyright_id":"0x2df61a7a3caeacffe830f73f767c0d6ed0569fb69816e59a05ed5803b7d61f87","isrc":"HKH612300010","name":"致我們的夢想 (feat. Jeffrey 魏浚笙)","registered_at":"2026-06-06T10:18:24Z","spotify_id":"1lY6aCnPSoLbwpukEk9l57","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df61a7a3caeacffe830f73f767c0d6ed0569fb69816e59a05ed5803b7d61f87. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1lY6aCnPSoLbwpukEk9l57.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1lY6aCnPSoLbwpukEk9l57.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4be83e26a5652f290f28debc26a33d06db36361620d2285f49fedab4231c80. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/46Ntxwf4zWxhWHjtqWul6h.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/46Ntxwf4zWxhWHjtqWul6h.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1483cb780ece35f09bb54227feb145de93d3f76b8229b5768b145c44faff652. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6l5q8rkGYOwrheeWK5puyL.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6l5q8rkGYOwrheeWK5puyL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c1eeb3db8a3c41182e17ae43d8d59f47e6bfa6146f06867b8c233c59af6bc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/24eRkKu3ZnpLqJ7YaUgNEL.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/24eRkKu3ZnpLqJ7YaUgNEL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad855813b1304f532c6838b6a9d4b4c616e4072997cd977649ea0d7f13b74ddb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2KzcB6TDErJlVTrVnqSBb6.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2KzcB6TDErJlVTrVnqSBb6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e7f22e1a5b76e3b28e33b3351e92420d9744e95e6539b7a96eae5986df0ae7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6BLstsgT265vZOENSF6Fyi.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6BLstsgT265vZOENSF6Fyi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769d813d5c3e94a0097d47b5a542f4fcf3b3bce7d056f3c27c929505d984e5c9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1Ch2ZvyJZdPzrzuKQFSmLh.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1Ch2ZvyJZdPzrzuKQFSmLh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c70ece569c5c9e8fd4aa46d290ef6b7859be341c81a26fbddc1551d60aacdde. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/71ATRUuaOuMZRqIuQMk40N.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/71ATRUuaOuMZRqIuQMk40N.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8737797e534234a3b23ff8da98867494b1153857bf5ee5f6fa3306104e5925. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2uP6qIYYdGN5yaRqeVm7F0.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2uP6qIYYdGN5yaRqeVm7F0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3a631706abc3eca8adcb808b742d01bef2567a63fac88666876765d3fef3e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2Zd5NHdqd0MlfD6TrfmDtn.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2Zd5NHdqd0MlfD6TrfmDtn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e2a2a4cca4c1e4582f57fe4ba9703c1fd322dbc632b385e651d85eabdf17ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1zLcKYEoEWZ2xGNQ5vfiaD.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1zLcKYEoEWZ2xGNQ5vfiaD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e52b2edc1730dae15d4e02eba56d7d64c02d4a5120073b445389ce33294b502. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1WYMj1mDJ3RPpFRY72B9OC.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1WYMj1mDJ3RPpFRY72B9OC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c741915c23df2b95c5852123fe313b76f0013fbd9b9448df9e1b800403da0d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5hu2y9IPLhre7yi1KOdv4F.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5hu2y9IPLhre7yi1KOdv4F.
{"copyright_id":"0xb6fcbfad04e6cedb91851c849b1055e62398d311ce024b7ea50691ae90808cae","isrc":"HKC992430153","name":"Have A Good Night - 動畫《睡個好覺》片尾曲","registered_at":"2026-06-24T19:43:14Z","spotify_id":"3rn4CL6gA83J08yDjEGtjc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fcbfad04e6cedb91851c849b1055e62398d311ce024b7ea50691ae90808cae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3rn4CL6gA83J08yDjEGtjc.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3rn4CL6gA83J08yDjEGtjc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2233ab979b4162a7194ad6141cb2484183008b0453d0e2c619af12ace6290e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4U3A1Btvy9PvzfIKjqxxhY.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4U3A1Btvy9PvzfIKjqxxhY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabc4aa3f1d031a36f6ada3f190ffe69b4871fec8200d42b47a388726787853d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/71stM8SnuY1xZE3yIBQdf7.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/71stM8SnuY1xZE3yIBQdf7.
{"copyright_id":"0x2df61a7a3caeacffe830f73f767c0d6ed0569fb69816e59a05ed5803b7d61f87","isrc":"HKH612300010","name":"致我們的夢想 (feat. Jeffrey 魏浚笙)","registered_at":"2026-06-06T10:18:24Z","spotify_id":"3LbDQfPOpaNQJt9zXX9uvT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df61a7a3caeacffe830f73f767c0d6ed0569fb69816e59a05ed5803b7d61f87. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3LbDQfPOpaNQJt9zXX9uvT.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3LbDQfPOpaNQJt9zXX9uvT.
{"copyright_id":"0xa0b139a30b294ff9dabef8229501cb67018de66156bb3f1dafdfebb1032d5ea8","isrc":"HKH612300015","name":"愛是… 2.0 (feat. 好青年荼毒室)","registered_at":"2026-06-20T05:37:37Z","spotify_id":"4FvwV1OuFzaxBFjMcvZdtZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b139a30b294ff9dabef8229501cb67018de66156bb3f1dafdfebb1032d5ea8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4FvwV1OuFzaxBFjMcvZdtZ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4FvwV1OuFzaxBFjMcvZdtZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a63302980d56bf275c2b7d0d2abda804411d6f18ac1862eb2dbba5b80b096b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0aqCB1fR2LiVmvg9iJYJgK.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0aqCB1fR2LiVmvg9iJYJgK.
我這樣活了一天 (電影《流水落花》主題曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c2afe8567dbff2773e09a2ee91f7f480631d772f3243250f7a59af5039b555. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7fXIqJAInOS7tVJfp903Ai.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7fXIqJAInOS7tVJfp903Ai.
對不起我忘了我愛你 (電影《世間有她》插曲) [feat. 馮德倫] - 國