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 0x669ebdec5de272748d18f7643031ac7deb3369a0d3b956fe2b20f7604a7e8c44. 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/3b1a2e49-5d5d-4806-9756-ab2c451f16c3.json and https://artists.proofprofile.net/proofs/artist/3b1a2e49-5d5d-4806-9756-ab2c451f16c3.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 0x74a2909688249f91b5ca057b50ccd0521436803731adcddf9c0ccf9b6e1c0ae0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:29:25Z), 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/USHM92299784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3afa6b143dd36ffced18aab051b4b57c1f00aeaaba0a413d8e599a169fa711. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USHM92299785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea025ba7111711b262ddc8d4d8a75b71f740e3197c7bd7399039bfe6f72bc8a1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM92299786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dee20b17b43fdf871b7ddb2f2d1184bb7c17ac0748adcff023c823a3038564. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USHM92299787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec9c1cf1996ecdabda64cbf558d80d19d488ab2aea16d4388602ae8f2829c38. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USHM92299788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92f18d2bbc01fae98a66175c212a1e3013babeadea0588231f15a96f00310f5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USHM92299789.
Sickbrain (feat. Super Famous Fun Time Guys)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf474ca7b2a58f995c0e1c02a1b11a7ede6a842032af0acf92fd04712c9536711. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USL4R2300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c33b7ffd796592ecb44e9a02103e61e034bb66d3e6974d59f5017513da6c593. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZEQU2401807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb07e81ea3bd890474bc784408626b257732beab3425f5ccac66f6492389e32a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZEQU2401808.
Problems (feat. Kung Fu Vampire & Bukshot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7f69b83598dd9b9b8441c6b0577d7ded2a375bac28e744d7ee7b4a4bc7a54b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:03Z), 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/QZEQU2401809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae67b2a2b754b4d5ba003613391f798c1b77cdb9b33e464cf9de7c94732d7cb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZEQU2401810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b41cf8a8b07e7c9aa35ce63a4c28d77bab3f355fc4fd3cad022e2cc7aa75a4. 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/QZEQU2401811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6047a13892e32b4d75c721c1987375dbf55c2fa125de15060bf5066e1db7e2a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZEQU2401812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf474ca7b2a58f995c0e1c02a1b11a7ede6a842032af0acf92fd04712c9536711. 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/USL4R2300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf142d358c7f2b91de498ae1192dad9e1e4dee56441d7d4202e7d19cd9aabf97a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:09:50Z), 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/QZEQU2401813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f09b3fdd09c8581ed8f277544a4a10afe5a8749b1908c140f4903783f731c6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZEQU2401814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e9f8468f4923f544359be4d298cfe9405cba4033059d6ad004a74474d2b7d8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZEQU2401815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd961ca662e2b6720b53259f782d130300d705a11aa9054d12250dec94b5be25. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USX9P2392013.
Till the Day (feat. Lune Squad & Demi Demaree)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d27a9ca668abf2da785b1b17a1569c425c899e8f40845a5a09134beff5fb08. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM21612319.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch