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 0xfb316a7acfa254bb617face12a4b16697dfe2c0aabb74b80d43ccfa4a3d41a91. 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/18a133d9-7aac-424c-9594-d09738e7f082.json and https://artists.proofprofile.net/proofs/artist/18a133d9-7aac-424c-9594-d09738e7f082.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 0x40c09e95c4578f18017f12a9c516617cba2ab1432c5059e6345e3e3b3626ff57. 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/56V2S0c5x60HACG3HBuWEi.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/56V2S0c5x60HACG3HBuWEi.
{"copyright_id":"0xee159c28b96b558b98e351924d3e7ea49b822cdd21cfa81476e346f102a4889b","isrc":"BKM2L2300168","name":"Mundo De Ilusões","registered_at":"2026-06-21T18:18:57Z","spotify_id":"46iUjppoWiWDwYGIFkCWLC","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee159c28b96b558b98e351924d3e7ea49b822cdd21cfa81476e346f102a4889b. 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/46iUjppoWiWDwYGIFkCWLC.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/46iUjppoWiWDwYGIFkCWLC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c09e95c4578f18017f12a9c516617cba2ab1432c5059e6345e3e3b3626ff57. 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/0yjIxai1IaH6Aew0K5ccwW.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/0yjIxai1IaH6Aew0K5ccwW.
{"copyright_id":"0xee159c28b96b558b98e351924d3e7ea49b822cdd21cfa81476e346f102a4889b","isrc":"BKM2L2300168","name":"Mundo De Ilusões","registered_at":"2026-06-21T18:18:57Z","spotify_id":"7IcQpaxHooNwljDCU8aJSW","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee159c28b96b558b98e351924d3e7ea49b822cdd21cfa81476e346f102a4889b. 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/7IcQpaxHooNwljDCU8aJSW.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/7IcQpaxHooNwljDCU8aJSW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91539637dc3e4458c9029f6c27b78574cfe97180a9478fd13ebaf815dc052a5b. 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/3srGb1OsHPgxSTsOl7ZiTd.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/3srGb1OsHPgxSTsOl7ZiTd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb790d42d25c871790e1fca646a537133f4acba741851182b371f7ab939c875d5. 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/3WkQB4dC44RqD7P33z0Ck9.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/3WkQB4dC44RqD7P33z0Ck9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701a1606c3bd5e7a0306423712192408a7044db07a96130865c514bafaa5e07a. 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/1uCasGURHhzPYiA7Hx7Rp6.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/1uCasGURHhzPYiA7Hx7Rp6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9921bd7c83497eb17ccf20b6c71ac5eba226679f39f6aa54b336d5d860a0caf3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6D4oCKXFcvmCjl8eJfW6V9.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/6D4oCKXFcvmCjl8eJfW6V9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817e7769df2a8b808b3efd355c4b3f7ba7d062a6724d24103817d78a90d1b408. 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/0yJY5X0zsJAEIGaog2xVaT.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/0yJY5X0zsJAEIGaog2xVaT.
{"copyright_id":"0x61dd2d81b56d9dfd4abb0a1e0b9d69abb78f92d5d2736bdff45853b8b86b44bc","isrc":"BKM2L2400300","name":"Reunião De Vagabundo 2","registered_at":"2026-06-24T09:04:52Z","spotify_id":"0IUi3Djaxj6qQxdObxJ1Nw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dd2d81b56d9dfd4abb0a1e0b9d69abb78f92d5d2736bdff45853b8b86b44bc. 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/0IUi3Djaxj6qQxdObxJ1Nw.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/0IUi3Djaxj6qQxdObxJ1Nw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa284d95b8a20f540f6f4af0a549c51c2067196798945ccc8676306de66b03367. 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/2NLq3lzFFfcVSHbIfNF1qp.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/2NLq3lzFFfcVSHbIfNF1qp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dd1a0b6292674111ebed7a1e5386df7f9acd8b0ea3861d3e69ad9a1dd9b878. 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/1bpB9HijFiDPvM0A0aojgl.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/1bpB9HijFiDPvM0A0aojgl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c3015704e669ed4bcb14e90c705a15b1664fbe470407e09d720f7e8a065cec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3tDcgCUp6lvlKmZR4rCJRB.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/3tDcgCUp6lvlKmZR4rCJRB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f1af6746ea1674f8f4679f4b2126700e80fb9947f3eb1de5cb12fde226371. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0K1U8IFP1E9k5YFv6CqtC4.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/0K1U8IFP1E9k5YFv6CqtC4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde29f3c94dfe4d4ddc82f49add807c441610d538a46e172b1b99bb95188f5fe5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/71j1s4l2oq9uh8CnBZyIOu.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/71j1s4l2oq9uh8CnBZyIOu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c09e95c4578f18017f12a9c516617cba2ab1432c5059e6345e3e3b3626ff57. 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/78TwNtWWLf73gZdVM6YbVJ.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/78TwNtWWLf73gZdVM6YbVJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f1af6746ea1674f8f4679f4b2126700e80fb9947f3eb1de5cb12fde226371. 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/5srvdWCasZiJaLwjkFPzyQ.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/5srvdWCasZiJaLwjkFPzyQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac452c7cb7664a963e9f04fbb41cef21059dc4476ae67d4926d5f7f692e169. 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/2yZg95cHTQoVunQnCFzK2K.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/2yZg95cHTQoVunQnCFzK2K.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d3b2c37823b7b1555b5e8321c994bf9103673c3300e6e998b580474831949. 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/1haS2rX4dtsdw54KYMPHbH.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/1haS2rX4dtsdw54KYMPHbH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a02c8d38da7714f0a04dab89dc7dc8e3907839ad69381eab743fcb4e3faaa2. 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/7kG85oHNkEKDLkv7aG53E2.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/7kG85oHNkEKDLkv7aG53E2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db276017ecc59f50b8428701759b2e1a0be509f727e2c8c9e579181ca08d00a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2DDAZ0yOiJpRksnCeuIw1W.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/2DDAZ0yOiJpRksnCeuIw1W.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9174319a6f33ebabb3cd5d2d50c3f6a6ae22763619f9c1500199248cc74239ec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7KjWjmm8ClgH0XOqyImFRE.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/7KjWjmm8ClgH0XOqyImFRE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4628bbc2eeb50cb44a875b9bb7010cedb81402c5d7d66cf819b4421f2e75226a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/62gWdIaO3rfs97NnncsuM7.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/62gWdIaO3rfs97NnncsuM7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2386ef3a22a1629aae207007aa6f42a40333c9d4088e4459ef06e0f3fc51ca8. 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/0m6XEupAMNIuk5Y1ujRmDq.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/0m6XEupAMNIuk5Y1ujRmDq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e1c9a22e4dfdbc16d2d24468f0435fa3405630fc85a1377021413575db075a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3JNjuecfroz0JNJNWYZ91w.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/3JNjuecfroz0JNJNWYZ91w.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9921bd7c83497eb17ccf20b6c71ac5eba226679f39f6aa54b336d5d860a0caf3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7bg7HxHyQSkMAppw0C3HwY.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/7bg7HxHyQSkMAppw0C3HwY.
{"copyright_id":"0x4628bbc2eeb50cb44a875b9bb7010cedb81402c5d7d66cf819b4421f2e75226a","isrc":"BKM2L2400444","name":"Tropa Da Matilha","registered_at":"2026-06-26T17:30:16Z","spotify_id":"4Emfkv2yhGzfb8VRtMV3YL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4628bbc2eeb50cb44a875b9bb7010cedb81402c5d7d66cf819b4421f2e75226a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4Emfkv2yhGzfb8VRtMV3YL.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/4Emfkv2yhGzfb8VRtMV3YL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d3b2c37823b7b1555b5e8321c994bf9103673c3300e6e998b580474831949. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7MDbi8WRrGYljtw3f2bUEL.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/7MDbi8WRrGYljtw3f2bUEL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a02c8d38da7714f0a04dab89dc7dc8e3907839ad69381eab743fcb4e3faaa2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3jAvHgBlyT9PkATbDSCqRD.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/3jAvHgBlyT9PkATbDSCqRD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac452c7cb7664a963e9f04fbb41cef21059dc4476ae67d4926d5f7f692e169. 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/5BlvUV1NEUg30On4lUoW7k.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/5BlvUV1NEUg30On4lUoW7k.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576f1af6746ea1674f8f4679f4b2126700e80fb9947f3eb1de5cb12fde226371. 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/2xo2S1R0Gjyxj9L7oHJFab.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/2xo2S1R0Gjyxj9L7oHJFab.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dd1a0b6292674111ebed7a1e5386df7f9acd8b0ea3861d3e69ad9a1dd9b878. 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/1twP7KLbyPVmPVvq7f1T6g.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/1twP7KLbyPVmPVvq7f1T6g.