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 0xc3a0ccb2d34d3dd85bb0ba93a6d83a17a5c7584e76901da5a9e70bb09a80822e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cdb5240-86e1-4265-a07a-795e03c4dc45.json and https://artists.proofprofile.net/proofs/artist/8cdb5240-86e1-4265-a07a-795e03c4dc45.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 0xa67be805de75fb4fcebbf08b2c903b2499ef3a2ca36e3d570a972ef3c899444b. 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/6xR3FozPJRyIlaNU48pXV7.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/6xR3FozPJRyIlaNU48pXV7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45197107caaa9cebe38fdd3cbc1a50069bf3e4b48a4802370cc3593dfa4b5dcf. 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/6ngfhauAytTZsaQgZyJIeK.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/6ngfhauAytTZsaQgZyJIeK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a445b16f6cb000d5c53387a97cb66d8c9ec15270e5738c6dfd85e749da79d6c. 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/1hhhJKOi5amv2eKGNbSgrn.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/1hhhJKOi5amv2eKGNbSgrn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27426734e76472d2b8c8d9ed38a2ba78e370314d20f338f517d7891e5816f720. 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/1PGzrNB3G5roihz0KiYPcE.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/1PGzrNB3G5roihz0KiYPcE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afd1c38070b4b5afddecd1c44d6ff06f372786e036ad2ff5b1b505ef303b1b6. 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/57huO7bLedlrVdKGNwuZAW.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/57huO7bLedlrVdKGNwuZAW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2ea9fab046dcded5fb87478c6dd195bb26b70b4b4e355d9c45d5c3e577bc6a. 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/2PogneD4c7isUlvNo2k2XM.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/2PogneD4c7isUlvNo2k2XM.
{"copyright_id":"0x3edd32d84915e9a79342bd87a5ee1e356879fc8c67f781de7dc570c7f9168e1f","isrc":"DENF61800082","name":"Willkommen in der Vorstadt","registered_at":"2026-06-07T12:55:54Z","spotify_id":"74b2K7bBkccYxuYyQnKRS6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edd32d84915e9a79342bd87a5ee1e356879fc8c67f781de7dc570c7f9168e1f. 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/74b2K7bBkccYxuYyQnKRS6.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/74b2K7bBkccYxuYyQnKRS6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841ca6ac8ac20faf5a2a28619004cb56cafa82aef6135ef9f3860671dd4ed40d. 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/4jT1jt9doFkHioj1Gr9qZ7.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/4jT1jt9doFkHioj1Gr9qZ7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf6d228e7e57a7df6d4c56d04595ed02a251555b50365111e58d1f4ac64b030. 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/0CbmM8sKLUr2BV3xULRn6R.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/0CbmM8sKLUr2BV3xULRn6R.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0386295daae04fa31c216197e81a52b23b538e5894a0df564ea95f3723434be. 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/3W7NVI1Weq2N2rRH1nbHCj.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/3W7NVI1Weq2N2rRH1nbHCj.
{"copyright_id":"0xabca1da33c25cac02fb22babb617a974cefdb199a868addd707f0516a9247bae","isrc":"DENF61800086","name":"Absturz (feat. Monchi)","registered_at":"2026-06-08T02:35:20Z","spotify_id":"0y24DoHidmvf1LxVIx045R","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabca1da33c25cac02fb22babb617a974cefdb199a868addd707f0516a9247bae. 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/0y24DoHidmvf1LxVIx045R.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/0y24DoHidmvf1LxVIx045R.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8110a47a925ff1c4749119b57e703f8533aeafdd0014ee894523c306b11054d. 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/0rdre1ZKpF897sqtwSYit6.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/0rdre1ZKpF897sqtwSYit6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872ad0acf28b9593f5403cfd51e16abc7a3aa3c84dc612049c89af90049cb963. 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/0c6EzAElZrC62yj80FLmpP.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/0c6EzAElZrC62yj80FLmpP.
{"copyright_id":"0xc7cfb1e482f28d3da4e3aae60d8662511e1cbb442f97d4e67aa146df3cdcb6fd","isrc":"DEDG61500097","name":"Crank Sinatra","registered_at":"2026-06-17T22:22:16Z","spotify_id":"4cMkb6StcIcBy8UMFETVLU","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cfb1e482f28d3da4e3aae60d8662511e1cbb442f97d4e67aa146df3cdcb6fd. 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/4cMkb6StcIcBy8UMFETVLU.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/4cMkb6StcIcBy8UMFETVLU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293c33b359d058c921087f1e821fa294e99fc3d74e056d422456026cd305f7f7. 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/2b7ahbuTCEQVJyZ0UIauSx.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/2b7ahbuTCEQVJyZ0UIauSx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872e3f9d0592e8a055aeb46189bbee84727e43351b2b4b08b65aa30847be0490. 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/7dp8DtkAyju9OCojT64DP3.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/7dp8DtkAyju9OCojT64DP3.
{"copyright_id":"0x90415da2812ac833b75cdd4c68a77cd308b500c2c44b08b968df7e8fe2a0e2fe","isrc":"DEA621700503","name":"Change (feat. Marteria)","registered_at":"2026-06-08T11:16:13Z","spotify_id":"7xZZMui0Da0aUFu8YGQ9hJ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90415da2812ac833b75cdd4c68a77cd308b500c2c44b08b968df7e8fe2a0e2fe. 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/7xZZMui0Da0aUFu8YGQ9hJ.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/7xZZMui0Da0aUFu8YGQ9hJ.
{"copyright_id":"0x90415da2812ac833b75cdd4c68a77cd308b500c2c44b08b968df7e8fe2a0e2fe","isrc":"DEA621700503","name":"Change (feat. Marteria)","registered_at":"2026-06-08T11:16:13Z","spotify_id":"1o8eoIiQrVDdxFEST6tJw8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90415da2812ac833b75cdd4c68a77cd308b500c2c44b08b968df7e8fe2a0e2fe. 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/1o8eoIiQrVDdxFEST6tJw8.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/1o8eoIiQrVDdxFEST6tJw8.
{"copyright_id":"0xb7eb17eebb7378d6e8bd81a31cbe856d6849471a75874b75120e037b172e007f","isrc":"DEUM72000989","name":"Papa war ein Rolling Stone","registered_at":"2026-06-05T15:57:52Z","spotify_id":"4dbdk8YxqLurUCeTo32JU0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eb17eebb7378d6e8bd81a31cbe856d6849471a75874b75120e037b172e007f. 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/4dbdk8YxqLurUCeTo32JU0.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/4dbdk8YxqLurUCeTo32JU0.
{"copyright_id":"0x20b61ce4e44b88e9d9ffd8ec1e55fb5050a11fafdbd314f9ed2be1e36d31dd27","isrc":"DEUM71403633","name":"Ich rolle mit meim Besten - Babos Remix","registered_at":"2026-06-04T05:33:42Z","spotify_id":"2AXOg2WMjJt8Os7M3b589T","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b61ce4e44b88e9d9ffd8ec1e55fb5050a11fafdbd314f9ed2be1e36d31dd27. 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/2AXOg2WMjJt8Os7M3b589T.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/2AXOg2WMjJt8Os7M3b589T.
{"copyright_id":"0xb65cb7f3e450656acd06c82e9fef7fdac7c16e6d4209ee3db7d98c9a043bab7b","isrc":"DEUM71714434","name":"Normale Leute","registered_at":"2026-06-05T08:17:10Z","spotify_id":"30lrdO0iubobuGiktWAwwN","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65cb7f3e450656acd06c82e9fef7fdac7c16e6d4209ee3db7d98c9a043bab7b. 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/30lrdO0iubobuGiktWAwwN.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/30lrdO0iubobuGiktWAwwN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf27c0a940d0db4187e40c93108114b11093b4e72822f4149937919c902a184. 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/2vmaAuWbIGRQxfifmYYFcT.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/2vmaAuWbIGRQxfifmYYFcT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a5809d711cd379fc5be5dac1704d2c165afd4742017adeaf61c5e3ffa3a5e2. 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/53cwAwEKo50sBJT9pebtuM.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/53cwAwEKo50sBJT9pebtuM.
{"copyright_id":"0x7d9d7d08a7475f3ec3a3e7cf90bcfda1dae5ca15953a2613599040355bd8b3c1","isrc":"DEDQ40700031","name":"Base Ventura","registered_at":"2026-06-10T16:14:20Z","spotify_id":"60OLkRN0UjUcTezxuyBM0d","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9d7d08a7475f3ec3a3e7cf90bcfda1dae5ca15953a2613599040355bd8b3c1. 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/60OLkRN0UjUcTezxuyBM0d.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/60OLkRN0UjUcTezxuyBM0d.
{"copyright_id":"0xd846f781674ed8d0a5f79a50a4c3f2c256ba80c17eb983f1c4a6a7b7d0e23f7a","isrc":"DEDQ40700032","name":"Tyrannosaurus Rap","registered_at":"2026-06-22T19:45:56Z","spotify_id":"4UNOyIaxWU0TKx866K0D4l","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd846f781674ed8d0a5f79a50a4c3f2c256ba80c17eb983f1c4a6a7b7d0e23f7a. 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/4UNOyIaxWU0TKx866K0D4l.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/4UNOyIaxWU0TKx866K0D4l.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5639d4a538fa28153f0d802aa5a70714a7f9d4805e5d4ddc865dba4891fa94db. 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/69aaG5ixlbRyxA6bMoeqCt.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/69aaG5ixlbRyxA6bMoeqCt.
{"copyright_id":"0x5cfa1d3a4a85f8027aa31efa565c2a9f7c182f1b8163fdc2eee7da4193178976","isrc":"DEDQ40700034","name":"Einer von euch","registered_at":"2026-06-23T01:20:46Z","spotify_id":"4ShF3fm3W9Vhmkn2vaXDYy","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfa1d3a4a85f8027aa31efa565c2a9f7c182f1b8163fdc2eee7da4193178976. 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/4ShF3fm3W9Vhmkn2vaXDYy.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/4ShF3fm3W9Vhmkn2vaXDYy.