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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e5b4695fed8b6cbff068ff1c1520bd80cd01729bcf6fb24bb761a724c97dcb. 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/10d42e89-0b65-4441-a75d-31334e409a4c.json and https://artists.proofprofile.net/proofs/artist/10d42e89-0b65-4441-a75d-31334e409a4c.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5d04318df38aefcd1e331f6bc911998cccbc6f20bd97ed10dcc8141ff90f15. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZDA42174201.
Cat Vibing to Ievan Polkka (EASY to EXPERT)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3a8f676bba89c428e876310ff723ddbb7aa1274d964a3cf17b08435357b3e7. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QZES62147314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59afbe7c5f8ed052fd24cd95617de658b7f125ffdb3cca7acca91024ada81968. 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/QZHN52163510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb50d7cc3146f7a351056043b90054a3129d00fa0352a6a2f7c2de5c5c492df. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZGWX2184728.
Friday Night Funkin' - Ugh (PIANO BATTLE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4748367cb4a8d7fd0b5a409cf04bd255222a3c384822daaed8ee6c149663e5b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZGWX2243004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af719d1e5a0f8a1c268da54c617a0dbdad3380b3c322a7c20b8b16c687cf471. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZMEN2142792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecaefc75e9776ef304a3b72f592476afe07ca459f7148d197b0eb7d185caa2e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZGWX2249938.
Pirates of the Caribbean | EASY to EXPERT
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd746b12032fd7760bd7d66bf403898224907c0a24667eabd2e51127ae6ee2917. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPJ32139525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4090496bcb777d39ec3c2e1e99a522f58efb4f729018db6b84f9b1c7d8cd23. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZPJ32140131.
Russia ft. Ukraine! PEACEFUL PIANO BATTLE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7048d5f7caa07e1132233f0559c1adb4552c8b770c92ba05b5ba21400895169b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZPJ32191519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cf45d46999dce51e0e32ad1b4e222e9ac81b78431a9aeddaff16c642147dfc. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZPJ32228032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0279ac737fcd13f436241ebaf18d090c64c12792c3cfca140b755ba1b920c91. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZPJ32247504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bf1fe555114eff6dda6f9a82750171a7f356ac623257cc2488944023f682e8. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZPJ32258889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00c7fdb1bd54ea6ae19c9db17223148362e3a77e9eb62a4615f0510f82cf4df. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPJ32262479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f85c2c39afc2652407c4b442bc70fa0ec3364de14d6f8659ecdc7cc9643ec4. 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/QZNWS2307213.
Chipi Chipi Chapa Chapa | EASY to EXPERT but...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bfeeab6918fcba11fbb77ae46986d761e06e75685b2ea58b0489ab051f4346. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFYX2434069.
The Amazing Digital Circus | EASY to EXPERT
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4cbeff6d50375b77c6404272b4b63119da07a41b6edbdfdea969dc2316869a. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZFZ22430486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5b28f0b0a68c4b08db59c2b5a2640ae852996d5f0bc37bd18c9b0c5f86d6ec. 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/QZPJ32334857.
Bling Bang Bang Born | EASY to EXPERT but...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8347d9ecf29bcd53f3c2fc8973c907cf0a31af32bd67370163cf28176640bbff. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZES92493731.
I’m Blue vs Pink Panther | PIANO BATTLE!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4327590ab7a53b15e8df968ac921a1eeec044bb0625a0bfda2185b4c8fa82870. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZHN62452880.
Pedro Pedro Pedro | EASY to EXPERT but...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b811352a201e82a00c8c1f6e6f2cc224aa640b3feef9c8596afe0b992c2ce1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZK6G2456264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab3a82ea488ed5b6dfffed75a16eb3db093d1a17d39acebbd31419b7152bfe7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNWY2433710.
The Avengers Theme | EASY to EXPERT but...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3608f5d378cc7a27f741b920a381c25b054418d87e40b105b55ba650bb83f534. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZPJ32384313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea045865580acb55eb0b3e50695123fb35bd69029dc7a9db05559c55f572b4a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB32473923.
English or Spanish | EASY to EXPERT but...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5fb4531d1995868d85257c78f27555146ce009991af786355e3188764406fd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB72417787.
Rat Dance vs Spinning Cat (PIANO BATTLE)
OLD PHONK vs NEW PHONK | Piano Battle pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d3375aec52da2eaf1eedaaa272944e9e0bc713199a5ee46a0c7f441af84a6a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFL2535288.
Aura Farming Kid | EASY to EXPERT but...
Carol of the Bells | EASY to EXPERT but...