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 0x71948f3a331cd621f9992845dbc55533d2413dd08771d2ab5f25743d3a87ea05. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4edfaf26-c008-4667-8f06-08af7d3cbc1b.json and https://artists.proofprofile.net/proofs/artist/4edfaf26-c008-4667-8f06-08af7d3cbc1b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Annoying Orange vs OJ Simpson. rap battle.
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 0x2ad698d9769cfe872730235b3b94bea39c26244f412344a24f6d5fc26d368909. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFQ2390519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1041697d9cfe20b81f97e1e8ceeb5859c23292e18a8ac75c2501d646c1e6b9b9. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZWFM2389304.
Pomni vs Preston's Hourglass. bonus battle.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98e65c9ff8e9cdc5d253ab2b6013b6e9236e2feaa365377ead50eb0401107a7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZWFM2389925.
Guy Fawkes vs The Joker. rap battle. by fightmarker.
Jontron vs Scott The Woz vs AVGN. rap battle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69e64cb9097e49d6746409a440b271879c9140b3cfa48606c8067b520d9a899. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWT2313722.
Babadook vs Ellen Degeneres. rap battle.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d456676948244b2ac0f2c46f6796f93b5116d5ffa38c1e75cc31df0c0c89fd4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZNWS2382827.
Nigahiga vs Ray William Johnson. rap battle.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6ac00c6e0e0a85cbd67a8dfc138d49acfa91be0167d7579e3ae697d741a751. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6H2365353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971c2811c0551b28cadff2ea037bc714877ebb801a5eb888b75652cdbcd31be7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHN72344773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a07b639c9ecbd1e9017ba09e7034fc22016ef3f96bbb197a89b4569b467ce7c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZHN72345250.
Harry Houdini vs Zach King. rap battle. by fightmarker.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6bc1d74219e1c2d246a504d6bc0d3b789798a5b37548e7779e98ea4a909bef. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZTAW2229760.
Majin Sonic vs Who Are You Running From. rap battle.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31415d6e1e797113b0e818426be511bef6fbe0249ee225d8c6be44607edc675f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWU2289846.
My Bloody Valentine vs The Leprechaun. rap battle. by fightmarker.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d26c4f6b01d868f0103b6b35eff266e1a05c3c1bc4ba57661090e5e4485249. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZDA52240643.
Dead Meat vs Nostalgia Critic. rap battle. by fightmarker.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd33f569ba6c618c67bcf695db6d94de9c58c0b1ecfda356928d83a4139099d7. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZDA52242762.
Sonic.EXE vs Red (NES Godzilla). rap battle.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733c6dec37910ade2f56919f36050d042b9f37a6d5404bb11ae99e1b51bd67c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWY2119959.
Corpse Husband vs Chills. rap battle. by fightmarker.
Ghostface vs The Zodiac Killer. rap battle. by fightmarker.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3043ed7249e3a49cdb02b6c16696e7ee7f067264022547f002187ee40e4834. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6Q2173207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f28d3194f9ddc7415f28d8ec439de06ae5420152a1a80dba5f9b0408e3ed1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWR2186383.
Oh Il Nam vs General Zaroff - Remixed Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337d1c47ee06d47d046a10a1cc20ea53f776b4734607e8e332f188922cd97359. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZMEQ2242693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d7310c84617b9057320527e05618e2592a7df74c5f83e8ad4cd8bf4475828f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEQ2242702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f1d93cdda6e1def2b11862a4f3054975ac475d1d9250917c7c41da0056623. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6P2404559.