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 0xc6e122917f4fc00b5735e449a965e86ff0265eda5c3c5f92ec84024bec318620. 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/75289232-efae-438d-89d9-b5d8aa2a6aa3.json and https://artists.proofprofile.net/proofs/artist/75289232-efae-438d-89d9-b5d8aa2a6aa3.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 0xd20875efc5729af6238db380b23f69497d4dea0b36bf0d25a89fb350f6caa2f7. 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/7HIjoaiILq0lCGzFtd2lFK.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/7HIjoaiILq0lCGzFtd2lFK.
{"copyright_id":"0xa3f98e2df809dab8f7fadfb4b9f95b527549cf10699442fab6e0697d49eb85e6","isrc":"US3DF2487028","name":"Sundown Surfer","registered_at":"2026-06-07T02:48:12Z","spotify_id":"3m7Cnk8dor8mkM3fUSDF15","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f98e2df809dab8f7fadfb4b9f95b527549cf10699442fab6e0697d49eb85e6. 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/3m7Cnk8dor8mkM3fUSDF15.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/3m7Cnk8dor8mkM3fUSDF15.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef341888094609e8bf0397bf94cbf2454e543383967574983cbda27d46c89c75. 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/3Rj9iZ0ZBpsPAvtFgv649Y.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/3Rj9iZ0ZBpsPAvtFgv649Y.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26347cc8a73997cf384ffcce23ecc25d01d80e16d393adf43f7245e06c7e1812. 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/5aaXCTFCitvmjMxTJJhqh0.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/5aaXCTFCitvmjMxTJJhqh0.
Have You Ever Seen Anything So Beautiful?
{"copyright_id":"0x5be5e613636d5c04dd9bcef4d27c7f4f34ee914c6d88c6fc90cc9102caa5617c","isrc":"NLSB72400068","name":"Stanni Bop","registered_at":"2026-06-04T13:01:56Z","spotify_id":"4qX6m9C4JKDnZCw14ObEUb","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be5e613636d5c04dd9bcef4d27c7f4f34ee914c6d88c6fc90cc9102caa5617c. 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/4qX6m9C4JKDnZCw14ObEUb.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/4qX6m9C4JKDnZCw14ObEUb.
{"copyright_id":"0x71a6e0b7f3e744ea05e47d0208f417882177544e13ed5e4d0f77d7bf3efe2af1","isrc":"NLSB72400102","name":"Have You Ever Seen Anything So Beautiful?","registered_at":"2026-06-01T22:21:09Z","spotify_id":"44njZosQwT8msM0QtaLQ2M","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a6e0b7f3e744ea05e47d0208f417882177544e13ed5e4d0f77d7bf3efe2af1. 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/44njZosQwT8msM0QtaLQ2M.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/44njZosQwT8msM0QtaLQ2M.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324f64d83961de39ac90951ad46259a45c15c5847cbcfc61bb10f5ca3483e2c7. 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/6ymFzWZ8j6tMZUSOxUYzJg.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/6ymFzWZ8j6tMZUSOxUYzJg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80277b234730d0e529fa67289142909a1d90f38d59ce454d8685558af0f2c1cf. 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/0r9t5dcRTbDD3s7Eoay30d.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/0r9t5dcRTbDD3s7Eoay30d.
{"copyright_id":"0xf5c51fca4914b2edf2ebfa0a79edd6fa9af78a4bc5849f278ece75b0e40a01f5","isrc":"US3DF2414558","name":"Azure Bay","registered_at":"2026-06-20T20:41:47Z","spotify_id":"7Jog2UQ2Spvj3LfT9nXIdd","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c51fca4914b2edf2ebfa0a79edd6fa9af78a4bc5849f278ece75b0e40a01f5. 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/7Jog2UQ2Spvj3LfT9nXIdd.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/7Jog2UQ2Spvj3LfT9nXIdd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be5e613636d5c04dd9bcef4d27c7f4f34ee914c6d88c6fc90cc9102caa5617c. 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/4048661BMF89elwvNOI08b.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/4048661BMF89elwvNOI08b.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d6c367c5c17b08c7a2d4863efa785d4b8a33098df6c5ca39131a8785539155. 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/47CForrmui4MDT15lORFl5.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/47CForrmui4MDT15lORFl5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86c64b023608a91c865e304183a13b74f490c726af81a315c9a24365b3d55ce. 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/7pbCyNwYxLnTmjmEDQXl6w.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/7pbCyNwYxLnTmjmEDQXl6w.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bac0bee2232077f4007ebb1e7862cedd33d530e42dfbd34f107ff6562a6542. 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/3WHHhwtQCQwrOH35QqxExY.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/3WHHhwtQCQwrOH35QqxExY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf333fefcdbb481797d443025c70a0aed85b0356fcb51f59d2be9fd42dab79337. 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/3S07sIXhTJLIlUzm2dogP5.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/3S07sIXhTJLIlUzm2dogP5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815348f7a4205f225aff3fdaaf962a8b86c36cba2df496d7e787ff5949e7b5e. 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/73Gy3k5zHgxyllf2HJBDtD.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/73Gy3k5zHgxyllf2HJBDtD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dc145705dcc269fca167b7472b6b1f16a78e29bd48bd31cd4cbb3e42ccbecb. 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/44uodUXYOmvSULRfBLVmdb.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/44uodUXYOmvSULRfBLVmdb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362ae75ea257b0da938cddd50dc17e7a59cca99075be4bf63a6a9723025c783a. 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/2QcvFCjqGgdPNZqMfBo7ca.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/2QcvFCjqGgdPNZqMfBo7ca.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4044fe0213e0f0b506adfa1fb07c99b4fc94b7e03a25095a7259ecace14760. 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/6zwDnspc4FqWCUcp0212Uf.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/6zwDnspc4FqWCUcp0212Uf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815348f7a4205f225aff3fdaaf962a8b86c36cba2df496d7e787ff5949e7b5e. 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/4xbX5knxNwIZ8dXKb432NQ.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/4xbX5knxNwIZ8dXKb432NQ.
{"copyright_id":"0x3c031f1b6bb18fd57cbd1d78cbab88a4076cfe3c0ea05cb49a8b2f4f78928be9","isrc":"USANG2470509","name":"Back On 74","registered_at":"2026-06-06T14:48:45Z","spotify_id":"68FkpOu2HppjIjOS2U30NL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c031f1b6bb18fd57cbd1d78cbab88a4076cfe3c0ea05cb49a8b2f4f78928be9. 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/68FkpOu2HppjIjOS2U30NL.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/68FkpOu2HppjIjOS2U30NL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf333fefcdbb481797d443025c70a0aed85b0356fcb51f59d2be9fd42dab79337. 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/1Ov57roYoo4akNBiudAowa.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/1Ov57roYoo4akNBiudAowa.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bac0bee2232077f4007ebb1e7862cedd33d530e42dfbd34f107ff6562a6542. 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/4mozkH2obh4CCqq6Wj4DEF.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/4mozkH2obh4CCqq6Wj4DEF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc0bc87310203b9f37495d66c307702f797c8744b73b1677203a1163aba3559. 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/3r388A2QSE5S0WeL8m2qs4.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/3r388A2QSE5S0WeL8m2qs4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877038fc48a49f4af2db0f00ad313e2f2cf523c4b53c621fdd5b83f601c6de9c. 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/2tZeZJaxSXDu66qk2lGRzI.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/2tZeZJaxSXDu66qk2lGRzI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca7a48362685727ef6f758435eb0f4382bae4549f1e372dd3649df8a1453d16. 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/0vqMLcqy5u0JoLuVPQtTiU.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/0vqMLcqy5u0JoLuVPQtTiU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca7a48362685727ef6f758435eb0f4382bae4549f1e372dd3649df8a1453d16. 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/32QLNWjVTpOoIRAzrPEWNv.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/32QLNWjVTpOoIRAzrPEWNv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efa3b83513ab70a14b2e87ef0697f1ea04265ab542caa16bc26808cb0b0bf5b. 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/295MPjfJpl53lP5nBhT6Za.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/295MPjfJpl53lP5nBhT6Za.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deb283ec3f60663bffb047b25e28912f326e93bba5cff3369248afe568567f0. 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/50tgFUMQYZ7plDjW0G4pij.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/50tgFUMQYZ7plDjW0G4pij.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86b39428e688a3aece41a0d3973b100dd951b3974f158338b0077fbe883e2e. 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/59vUtjLVDKlFtemXHqzGhr.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/59vUtjLVDKlFtemXHqzGhr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4044fe0213e0f0b506adfa1fb07c99b4fc94b7e03a25095a7259ecace14760. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5RJ30GJr0ouprbOewEwm5I.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/5RJ30GJr0ouprbOewEwm5I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ba3f2bf5d4c90181009ee970583fe3798dfa47bebd23948e6e6b9343864254. 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/1tNC4cffQmLCCSVxpNzMjn.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/1tNC4cffQmLCCSVxpNzMjn.