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 0xd89f582efcdfa8a080ce12a4cdb995e511d7ee555d6d156b01f0b2369461fd2d. 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/253f94aa-a4c6-443c-b1c7-c5262d0d88ad.json and https://artists.proofprofile.net/proofs/artist/253f94aa-a4c6-443c-b1c7-c5262d0d88ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xa67268c1f4ca005f5bd0141fd8664afa63c11faad13069764b4ffea6af41bc4d","isrc":"JPB452105760","name":"リトルダンサー feat. Ito (PEOPLE 1)","registered_at":"2026-06-04T08:42:17Z","spotify_id":"2aKT3Rwcf0MKutWB9mcg5p","type":"track"}
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 0xa67268c1f4ca005f5bd0141fd8664afa63c11faad13069764b4ffea6af41bc4d. 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/2aKT3Rwcf0MKutWB9mcg5p.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/2aKT3Rwcf0MKutWB9mcg5p.
{"copyright_id":"0xa67268c1f4ca005f5bd0141fd8664afa63c11faad13069764b4ffea6af41bc4d","isrc":"JPB452105760","name":"リトルダンサー feat. Ito (PEOPLE 1)","registered_at":"2026-06-04T08:42:17Z","spotify_id":"73fASLoM1nIX3RXISl2C24","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67268c1f4ca005f5bd0141fd8664afa63c11faad13069764b4ffea6af41bc4d. 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/73fASLoM1nIX3RXISl2C24.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/73fASLoM1nIX3RXISl2C24.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650ebb9db4fdf773864807d611c5552fc0a966d517bf810256f6f8f3b4856d8c. 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/28E21YBEiY80Db1o5TAKPG.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/28E21YBEiY80Db1o5TAKPG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f26870344f3b92b6d06d7884b65cab9474da234bd69e59de414397327d02e1c. 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/3KQjWRg74fYIaAFwWPJSLm.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/3KQjWRg74fYIaAFwWPJSLm.
ワンス・アポン・ア・リバイバル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dd666b33072d242d683065ff3d2d03ca6bcde63b783edb9bece6343af22b11. 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/6MrJYU78mz1Vth83LDFRlG.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/6MrJYU78mz1Vth83LDFRlG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69886d26c44e9edbb8896e5e2d3742ef58052a9a0fa435e91e101917f23fe1f6. 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/1AYomXDCjeoh8PPtgRPenx.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/1AYomXDCjeoh8PPtgRPenx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29515534be22faa4d6d433a6170820d200f97c91ab049ddfd70a28563d39e0fb. 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/7C9EaqWPh07WL9mZN7IQRP.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/7C9EaqWPh07WL9mZN7IQRP.
{"copyright_id":"0xa67268c1f4ca005f5bd0141fd8664afa63c11faad13069764b4ffea6af41bc4d","isrc":"JPB452105760","name":"リトルダンサー feat. Ito (PEOPLE 1)","registered_at":"2026-06-04T08:42:17Z","spotify_id":"4YyalpG25LRXCSBEgQgI0Q","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67268c1f4ca005f5bd0141fd8664afa63c11faad13069764b4ffea6af41bc4d. 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/4YyalpG25LRXCSBEgQgI0Q.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/4YyalpG25LRXCSBEgQgI0Q.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2928672e2c9f10c821fd70e2818ec8cec1f329b81787516f85299ee53317f8. 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/2V3wp8bYiww9tbRyPK8Bn2.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/2V3wp8bYiww9tbRyPK8Bn2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d61a09d18b8be0c43c66af071f459477cc2d39b0ba44e7878806384a2f6a86. 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/0UfibtjJfsjOYpOIm5XcFW.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/0UfibtjJfsjOYpOIm5XcFW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda6a86acf501dc0724540d21268a943ddcb40a0d282ae557d47d4e4ebac40ca. 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/1ivFRvLmAczwWLeB7itTU5.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/1ivFRvLmAczwWLeB7itTU5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ada46350902beef7fd65b8af106dbfab955c8ed639cc634658664113ba29e2. 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/3ILA858bkYyDznOeZfXSM1.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/3ILA858bkYyDznOeZfXSM1.
Talking Box (Dirty Pop Remix) / SPACESHIP
もしも生まれ変わったならそっとこんな声になって
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de9c52357da794b573b473f2387c15df8c8b9173f8021d3f4593ca8a34d5a6e. 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/0YGiwqpEM6z2poUTqtLKAd.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/0YGiwqpEM6z2poUTqtLKAd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5241b98d7b70111d135b11c273214c90b315144d7d3cb4ef4aebae09976eb2f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6UdOSK3Fu5QWGhWPZW5epA.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/6UdOSK3Fu5QWGhWPZW5epA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5241b98d7b70111d135b11c273214c90b315144d7d3cb4ef4aebae09976eb2f. 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/3ps5WSAXrgvjN4IxIPchsV.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/3ps5WSAXrgvjN4IxIPchsV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bd0e32a00a152c1cd6efb82074b1b4acc42d92e9798888ab3f47405eb777a2. 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/1yeVYPhxJBdeSoUFVf0gkb.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/1yeVYPhxJBdeSoUFVf0gkb.