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 0x369a045a63944ee8bcf3c6341e611280b850ea058e27acac807c4e0c00ebf32d. 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/3579db77-caed-440a-acf8-03202d4f3000.json and https://artists.proofprofile.net/proofs/artist/3579db77-caed-440a-acf8-03202d4f3000.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 0x0043c258d4ae720411016411dc064f673820a09239bd6a3455318de281d8006a. 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/3UskzQ6ZtfpyFSAcEQP6Og.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/3UskzQ6ZtfpyFSAcEQP6Og.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe607f4fc7bc5dddd54e1b7a701635cf6b926cbe9324aa69fd0a1deaedf892529. 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/6fWUqbAIfEknljRnpgeIzb.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/6fWUqbAIfEknljRnpgeIzb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8810130a6a8aeb6329c3c6d648bc7ff8fb133500e40c5f2890d48cfd530343. 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/4IbRlPV0qx1qqi1GHfgLQY.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/4IbRlPV0qx1qqi1GHfgLQY.
{"copyright_id":"0x1c983f3c44243cfae8f5245a4a4eb3ff1ab96cbbba64aa359df478a8e09954c3","isrc":"BCBA42300002","name":"CHRIS BROWN FREESTYLE","registered_at":"2026-06-20T06:14:22Z","spotify_id":"4wdMshLviJb0BT07jbo4Hk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c983f3c44243cfae8f5245a4a4eb3ff1ab96cbbba64aa359df478a8e09954c3. 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/4wdMshLviJb0BT07jbo4Hk.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/4wdMshLviJb0BT07jbo4Hk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dcbcbf143afbe3666f35659dc7fbaabae47ce1f1dba4a8d1e886ca8e2e59e2. 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/7INhkZpuSKAKImU2YVAXlX.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/7INhkZpuSKAKImU2YVAXlX.
{"copyright_id":"0x8d00105d0d98c0f9f1b6df43a8f901c6361ef47852d9baf8ced5dd11dc7783d1","isrc":"BCBA42400004","name":"BOOMBAP PERFEITO","registered_at":"2026-06-04T08:44:33Z","spotify_id":"5OrfScVAsdqEgo4Og8ebrv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d00105d0d98c0f9f1b6df43a8f901c6361ef47852d9baf8ced5dd11dc7783d1. 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/5OrfScVAsdqEgo4Og8ebrv.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/5OrfScVAsdqEgo4Og8ebrv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11e5117ffe20e3d9307172b9bcc2ebb19264652adc1489034318ddad4519d46. 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/20KRL1ro432gaveM5o6axr.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/20KRL1ro432gaveM5o6axr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddf77cbc79b5130465f6bfb7422970c3390051472214a2c6389b43c16453dd8. 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/6fEF6QOuQ1gj1QnSewJlC5.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/6fEF6QOuQ1gj1QnSewJlC5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767567e0e97cc9d9bd91406b3072969668272d0c9c9f938b15ea422aed501e9d. 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/3U9fw4BYFtlQPJrRek6P0i.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/3U9fw4BYFtlQPJrRek6P0i.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2078db27dd35882cb329172a40069a2f1490aff11806c93bd1cb23553830a768. 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/3uEAJP1Ke5uQr6X6RTqDwF.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/3uEAJP1Ke5uQr6X6RTqDwF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bdf6a98b4e4d0bc9d659471b096799dae35075b45f24de80b11504c14f5253. 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/58RVfvva9bDOwfHtEIDClt.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/58RVfvva9bDOwfHtEIDClt.
{"copyright_id":"0x0127d44666ae0233eb1ba5ff8ef9de7ab564f5c0af3fce359b9ac12bcadf258c","isrc":"BCBA42300012","name":"A Volta do Ano Liríco","registered_at":"2026-06-09T17:37:54Z","spotify_id":"4ouvJoJPRegfBqsRj4ihsL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0127d44666ae0233eb1ba5ff8ef9de7ab564f5c0af3fce359b9ac12bcadf258c. 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/4ouvJoJPRegfBqsRj4ihsL.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/4ouvJoJPRegfBqsRj4ihsL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fd1231a3e1ac7511d53f19b2601b62441f3ff5deba6cfde31bdf49f3120290. 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/4xqvO2Gre94zX4NZd1aIp2.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/4xqvO2Gre94zX4NZd1aIp2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305e000fa073d28379c5d7deb7db526428bfb6781c350de034d6ba57ac9d4f61. 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/4x7S3R2QKKryow6RQy4Nso.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/4x7S3R2QKKryow6RQy4Nso.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b70779257da89682d17e97b40509e7b5468d0f6cced4a0ad1f144ffaf84f10c. 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/05YhN5xiVmL2L51CU90Ota.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/05YhN5xiVmL2L51CU90Ota.
{"copyright_id":"0xc4fdbacd8436d407f87fe37343ba701575898ef90558b8b4861a7fae76f6b61f","isrc":"BCBA42100027","name":"A Volta Do Auto Tune","registered_at":"2026-06-24T13:13:57Z","spotify_id":"6M0iGLRkhcG6gBhyJb0DRr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fdbacd8436d407f87fe37343ba701575898ef90558b8b4861a7fae76f6b61f. 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/6M0iGLRkhcG6gBhyJb0DRr.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/6M0iGLRkhcG6gBhyJb0DRr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8255294bc96a612463e0ebf892000e3048edb2e6f91ff676f9ffb6a106f712e2. 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/2uTniZ5v1J98gGAzrcR9nm.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/2uTniZ5v1J98gGAzrcR9nm.
{"copyright_id":"0x0bcaf5520cf4bdfa047cfac8556fa3ab4ff532fda3e73ff51a49a6d8b410cfb1","isrc":"BCBA42100020","name":"Mamma Mia","registered_at":"2026-06-20T07:38:42Z","spotify_id":"1lNV7ZoikHgBcepr4w0JsV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcaf5520cf4bdfa047cfac8556fa3ab4ff532fda3e73ff51a49a6d8b410cfb1. 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/1lNV7ZoikHgBcepr4w0JsV.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/1lNV7ZoikHgBcepr4w0JsV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda72321edd67cd93ebf533a7703e17a694c313da0bee6c585df0439fbdd67296. 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/3BjED4iKi83IGmDKTCdJzV.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/3BjED4iKi83IGmDKTCdJzV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a79603dea11917f4f43b85300cd0ff4d0b976c846a3b61b10f86725d2f8178. 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/0yFhiG5JefH6db4IeMXax3.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/0yFhiG5JefH6db4IeMXax3.
{"copyright_id":"0x8506521fac459af57f1befd43e41efd6ca3e70e18e5b9de1fbf8fd816e1a2e2d","isrc":"BX9BB1900001","name":"Rubi Acústico","registered_at":"2026-06-07T20:00:38Z","spotify_id":"5Ks6mwOGdmuoUugUCrzvf8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8506521fac459af57f1befd43e41efd6ca3e70e18e5b9de1fbf8fd816e1a2e2d. 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/5Ks6mwOGdmuoUugUCrzvf8.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/5Ks6mwOGdmuoUugUCrzvf8.
{"copyright_id":"0xb20e274cca545efc9219dc19aca448415d736615e302d4dcd25aead6a9f9fb75","isrc":"BCBA42000011","name":"Suco de Fruta 2","registered_at":"2026-06-09T17:39:20Z","spotify_id":"4vRfWUDyNArLqk2YSV3G9q","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20e274cca545efc9219dc19aca448415d736615e302d4dcd25aead6a9f9fb75. 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/4vRfWUDyNArLqk2YSV3G9q.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/4vRfWUDyNArLqk2YSV3G9q.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438d866f5d20e0798a57c8e076e9b65b899e26b33ef6c05d082d65937cdf1eb7. 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/6RjwF8vptvEfYdHdVPgP15.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/6RjwF8vptvEfYdHdVPgP15.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd252366f07a25cc88864814b895446fde4b38c39dda78dccaed29e5eb5f1d2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1T1IyxcrTBREq2CuO9aSnT.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/1T1IyxcrTBREq2CuO9aSnT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aedb4185a6699cfa3acdb5a6e2c4446fbd101d5c00f214ec2521fefa20aa2f9. 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/21IOQrtSoRKTK9YRZzh6iq.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/21IOQrtSoRKTK9YRZzh6iq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71563d30c96f1a0430cd555f0016a8bc795ac3b29f2a81ba0abca5f9a35731d5. 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/73YsCb7tvpKg0JP2db9NAU.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/73YsCb7tvpKg0JP2db9NAU.