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 0xa81292899b04926bfdd31653217e8ea75d887743f0147c3dfd018bee88022a02. 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/667f6b1c-f428-4a7c-b031-72310f950bb9.json and https://artists.proofprofile.net/proofs/artist/667f6b1c-f428-4a7c-b031-72310f950bb9.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 0xe541d1205c292b615aaec37212391bd028176cbaa50a81f222e354e89a917f5f. 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/6CemVo8DcF8iP1CUt7osNX.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/6CemVo8DcF8iP1CUt7osNX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36af1c14fa1a1b81cd53e5690c602621af6934f834882eeed5934ab881c946b. 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/0Idti0vhC8W8a0TUpqj8Se.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/0Idti0vhC8W8a0TUpqj8Se.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f43d4b46cea760d8e599e35b40dab634386f3839424e6a115c26e6ab87a63db. 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/1QunERqeFHWNSkzoQ9hb1R.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/1QunERqeFHWNSkzoQ9hb1R.
{"copyright_id":"0x49c5ed325b74c9b797a2e2e73c56524a33e1e62cd356d7b814fbe017296224f0","isrc":"USWB11300348","name":"Close My Eyes Forever (feat. Lzzy Hale)","registered_at":"2026-06-05T12:14:41Z","spotify_id":"4Rxvi74lUQRo2W0VECschg","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c5ed325b74c9b797a2e2e73c56524a33e1e62cd356d7b814fbe017296224f0. 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/4Rxvi74lUQRo2W0VECschg.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/4Rxvi74lUQRo2W0VECschg.
Out of Line (feat. Serj Tankian & Terry "Geezer" Butler)
{"copyright_id":"0x16baac1686f34efbbe2c9e391642421556f967b1dabc6f120586ef10ba28704f","isrc":"USWB11300349","name":"Out of Line (feat. Serj Tankian & Terry \"Geezer\" Butler)","registered_at":"2026-06-04T15:37:32Z","spotify_id":"78yu97GbU9MoEx5c9RiB5p","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16baac1686f34efbbe2c9e391642421556f967b1dabc6f120586ef10ba28704f. 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/78yu97GbU9MoEx5c9RiB5p.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/78yu97GbU9MoEx5c9RiB5p.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaf83570757246ceeb5dbb41bbdbdd8363e8829d705f057574a48287e973b37. 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/5gNI5jUJTRbFqFPRo4VS13.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/5gNI5jUJTRbFqFPRo4VS13.
{"copyright_id":"0x44de934403c4141ff7d38bbdc896fc7d83e00d33f17f256bd6d7ace8d97cfea2","isrc":"USWB11300351","name":"Opinion (feat. Tom Morello)","registered_at":"2026-06-08T19:38:00Z","spotify_id":"0wNI9cs11XSjBcZuT7wYz7","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44de934403c4141ff7d38bbdc896fc7d83e00d33f17f256bd6d7ace8d97cfea2. 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/0wNI9cs11XSjBcZuT7wYz7.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/0wNI9cs11XSjBcZuT7wYz7.
{"copyright_id":"0x7d57733ef8fc31f02b815edb7b0d67040cfc4ef5e387d9ef613be44b62fcafc9","isrc":"USWB11300352","name":"War of Lies","registered_at":"2026-06-10T16:42:18Z","spotify_id":"04LYtARvU0WNFVtagj3Sr9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d57733ef8fc31f02b815edb7b0d67040cfc4ef5e387d9ef613be44b62fcafc9. 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/04LYtARvU0WNFVtagj3Sr9.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/04LYtARvU0WNFVtagj3Sr9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26751a6f6de530012298ceb1bca8cb612483884988f651157ab1858b726d554c. 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/7gNsMfmfSdK0JntmjlmFZF.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/7gNsMfmfSdK0JntmjlmFZF.
{"copyright_id":"0x961c4a848f1bbcca3e53b7aad1de8bcd9a5cb4b47da75ef8b849cb908339b7d8","isrc":"USWB11300354","name":"Through It All (feat. Glenn Hughes)","registered_at":"2026-06-09T17:02:31Z","spotify_id":"4l0m1env2VF17hhoIN8YCo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961c4a848f1bbcca3e53b7aad1de8bcd9a5cb4b47da75ef8b849cb908339b7d8. 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/4l0m1env2VF17hhoIN8YCo.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/4l0m1env2VF17hhoIN8YCo.
{"copyright_id":"0x61eee327a671bae6abb8f63839b2f509bdc1fb7d8e2c0146823af85914acbd29","isrc":"USWB11301859","name":"Vilify - Future Funk Squad Club Mix","registered_at":"2026-06-24T18:14:30Z","spotify_id":"1vu9ITuBYJuXYO3MIbZxPc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eee327a671bae6abb8f63839b2f509bdc1fb7d8e2c0146823af85914acbd29. 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/1vu9ITuBYJuXYO3MIbZxPc.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/1vu9ITuBYJuXYO3MIbZxPc.
{"copyright_id":"0xd1fdcd361b77b493e8aaeac7cf1542a66474fd34415a97a1c20f8d6c7621e6c6","isrc":"USWB11301848","name":"Vilify - Philify Remix","registered_at":"2026-06-18T19:08:20Z","spotify_id":"3BFYYvUltZwFXr2Xxk8ulI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fdcd361b77b493e8aaeac7cf1542a66474fd34415a97a1c20f8d6c7621e6c6. 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/3BFYYvUltZwFXr2Xxk8ulI.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/3BFYYvUltZwFXr2Xxk8ulI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f43d4b46cea760d8e599e35b40dab634386f3839424e6a115c26e6ab87a63db. 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/1T424a0qo4pe5CGm94Uixl.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/1T424a0qo4pe5CGm94Uixl.