1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0x359ea1e937edfd5ac06ff83962bd03fc0adf13735836b920e56e8ae390c4ac6c. 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/50e4d134-ac37-4143-b0f1-309001bbb6ab.json and https://artists.proofprofile.net/proofs/artist/50e4d134-ac37-4143-b0f1-309001bbb6ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81e56d5f9affb2898c0eb6a16548c079c16baf22b8858dfc5baf7b67b367dd6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2403369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf0f7ddbd375ac4344f49949008333fdd6873b7c9f3b636cd09480ef9675c58. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHM2414866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5c6a002e5d0d495b2e3e1f1d98e82bf21b2854970ed113601172e237f00d73. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:05:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2456421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3873ca308c34ffc98d96f10a63552be88b64ae7a2c8fdd10c0ae6324763584bc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2453023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b68871afc51a978ec3638cb76488679f3e81e48f662fc6eb0c05459d37bc734. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZVEM1845496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bc17a10326a389bbf5001803d521df3729c84ca2ebc6a3b6f4b1375b53cb96. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2482011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809d9c5690bfbf0fdef7b84cdf0c6334794529b7c7dfc18860d5569cc7b48e1c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPEW2516280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0cc2859f061cee4c060dd341fe4b0cb37409e4a0b1f53dc76228610fb091b1. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPEW2526448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1017478a77bcd8b5eb725f4016cac446b2ee03df305263da156bbb3ff39782. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2519408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381529261b3029e039ed852f5e6c2dbcd4e1e552d2f24808f79de71978b3df3a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2506646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a68a21b84a0e9217104df92e5c8ed4471b63940633756fe377e31df5c580815. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKZGC2500376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950b7ae99d0dae5784acd90f410ec039c3fdbb438c8887d30d2d43e60f0f9672. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:02:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2590901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f044138b3b4aef99a4c52e0a0ae4012588aa8ba5875df92ba652670d2cbaf4d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2519407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1dbd822a361349ce337e614322c385ec57593ebda215b1fb411736e1faaf08a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2539313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8d74c8da59efef80c68e7424108b6f07abeefe17730c34a502ad140deb769. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2532993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8d78eee74bb09845cc62e253dbe57d57bac5a23695c6f8495240c9c4de5b01. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2571821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602e0e403ec52004ca455ceab021c98f57ad1a86076b554f0d33597ce6ce94e3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T17:34:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2572924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d8a633d8227de3a1c4e3c52b298566512942ed24d47f5038affcdd069d792a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2599435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966683b42b349f96b789b7f05bce79c8ef8a095544f9f6f32ce15fb427ede8bc. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:32:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USANG2512114.