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 0x8a6195d3b7923d570708bbc2f3dbcc1c6ffafbb5cba0c539a10bb1ba2b9a6653. 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/5e31a130-c47f-4ba8-8451-bc9d384860ad.json and https://artists.proofprofile.net/proofs/artist/5e31a130-c47f-4ba8-8451-bc9d384860ad.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 0xee96de364882fb3095488066688f141be35ff1a35715e0d7c2f38d86ababee9f. 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/33iPIs971Oqe0cEgf2hmvn.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/33iPIs971Oqe0cEgf2hmvn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fdced44c271c979e9d2e7ca2e19ae93f2d454fb08504e2d391decfdc5b6b8e. 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/2YLFBenkPTTiCbRfAAKLYm.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/2YLFBenkPTTiCbRfAAKLYm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bef0803efe3ab5b152210a607dcdabd4920dd44567330398aeace3157139c1. 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/5x2GaQMeBA4SSWXKMrBUYR.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/5x2GaQMeBA4SSWXKMrBUYR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f7883a896cb961145c38b3cbbb01cc7a689eaee9fdd993f00f7db847c04e7. 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/67zhgAhcR9v5tBsjzmpCbw.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/67zhgAhcR9v5tBsjzmpCbw.
{"copyright_id":"0x7f3abe7f7dcc29f8ead2dfb83e1e24dd1dcb7fa5dbfc455920e9e01f8a69f4a4","isrc":"ZA56E2304051","name":"Last Call","registered_at":"2026-06-07T08:00:46Z","spotify_id":"6UjUWtGBR4bGO8FfTiaUVY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3abe7f7dcc29f8ead2dfb83e1e24dd1dcb7fa5dbfc455920e9e01f8a69f4a4. 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/6UjUWtGBR4bGO8FfTiaUVY.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/6UjUWtGBR4bGO8FfTiaUVY.
{"copyright_id":"0x49dcb9062316fbbf79e8b3124aa902dff86bf51bd5e9468b022b27d5d14bff98","isrc":"ZA56E2100029","name":"They Be Talking (feat. Lil Durk)","registered_at":"2026-06-26T19:02:12Z","spotify_id":"7HcMXL5AscYBKZIUvwwVhH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dcb9062316fbbf79e8b3124aa902dff86bf51bd5e9468b022b27d5d14bff98. 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/7HcMXL5AscYBKZIUvwwVhH.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/7HcMXL5AscYBKZIUvwwVhH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3b4fb3b0fd954c52a2d4c6e54e8cfbe9c3b1dae58a759cd503418582b6c179. 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/7KdJNajJL132fV1gBs7zGm.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/7KdJNajJL132fV1gBs7zGm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f2b8cb13fd8b4550d63298e5a4be19f38b1f794803ce8e72ad5937dbd4b97. 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/7jC9kYyhEGmEL8MSNda1mA.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/7jC9kYyhEGmEL8MSNda1mA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d535a5d74f6659948028290f847ee8c59fe269335220416c92ab5a3125f7d1. 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/6XrG46AvOK2C8secd8cVL7.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/6XrG46AvOK2C8secd8cVL7.
{"copyright_id":"0x7f3abe7f7dcc29f8ead2dfb83e1e24dd1dcb7fa5dbfc455920e9e01f8a69f4a4","isrc":"ZA56E2304051","name":"Last Call","registered_at":"2026-06-07T08:00:46Z","spotify_id":"7cWY7DetNYdMWgJ4VPB4ni","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3abe7f7dcc29f8ead2dfb83e1e24dd1dcb7fa5dbfc455920e9e01f8a69f4a4. 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/7cWY7DetNYdMWgJ4VPB4ni.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/7cWY7DetNYdMWgJ4VPB4ni.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9393f5f87e578ef5d08628604430e8eb0d88212115247c4a0ec1c8dc9a460865. 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/3MNk7s4RrgyjIg1H8niBXa.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/3MNk7s4RrgyjIg1H8niBXa.
My Chemical Romance (feat. YUANG, Willy Cardiac and AcidVsAcid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222f2b8cb13fd8b4550d63298e5a4be19f38b1f794803ce8e72ad5937dbd4b97. 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/7hWnVzy5NhXDhrpchKVjwl.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/7hWnVzy5NhXDhrpchKVjwl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f0756efe039b8b8786509da7c98e42860f7af61b0de33f346bd064f255d315. 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/3mLqoczMMWIKdfavClCWDh.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/3mLqoczMMWIKdfavClCWDh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabac74c1ada49d5508f1c5da93fe373f7b49039424cd09f6cd799b2ac1d7558. 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/5uPdyodJfDjBkKVHs5lVkA.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/5uPdyodJfDjBkKVHs5lVkA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf453365aba977bcd94ba9ac15a0d6086d3c47e32c93d26b278cff62606d8fc26. 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/5Ge1gnQUJDlR0k8BWvNuPu.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/5Ge1gnQUJDlR0k8BWvNuPu.