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 0x5e9af4fb9695e517330ba2d11f3ba127164cda04f7f8b4bbe5f4aeb9067c0b6f. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36f16bce-3b8d-4b25-a146-cfff2f294667.json and https://artists.proofprofile.net/proofs/artist/36f16bce-3b8d-4b25-a146-cfff2f294667.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 0x2687c9a76e4c94da802a46f428706cb437d51a70a20624f58a5d3d0de475c1c7. 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/USCGJ1612512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70146c655c68d3caab6634c5fba43aea25949b2fb554258d41e1a6550aae602. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USCGJ1612515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e0f5e5d2da630a8c99d33ba8766b45b7933a096910838a4f7fd1242e9aaa10. 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/USCGJ1612517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4fa6c5731629178de653c9ffd1955ea128c3e422129651f91e3f08578ad3ac. 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/USUYG1014472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca29cc754706851383170ef7ca9cc5c8c62068398df0faa9b2facbf0b37d520c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/USUYG1014474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb914ccd46813b59ec843911fd97e2ddf5330b02e29ee52a11fac7193e1f63a0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USUYG1014475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583b8e506b05057e6bd1db21ef3b3eb61690a997242718cf5f1996af17820d12. 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/USUYG1014479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bb2febb7b2840363144637b09eb28a8a6ae017cf92a0d28aa7682f7b976f5f. 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/USUYG1014480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27ca3d9df377b43cfe19886a2353838f55b2af4a3dd0da5bfcf740d22731fd4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USUYG1014484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190bc9c20d3a8879ede9be841d61a55b70f1aeff34483b3811cd9f1e35285e64. 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/USUYG1014485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02e66684b2e50bc205bb829c6d821e9806e0d95dc17c6d66f4f5c75350cfbc3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USUYG1014486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe24d88ad7bed2d111c9c3509edefbb3689fdec7cab3393d26d3eb2dadd6da5d. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USUYG1014487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b063d0b14acd047af6f03c8c028372c0ad6c4673787f982333037269b244b1. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USUYG1014488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e6591802c3a6b8a1ff0fcf0f80ac8a4662e575e583f9080661ea541deb812f. 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/USUYG1014491.
Menace 2 Society Presents: Gangsters & Thugs, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c5ce14d06d72cafba85a4a7bf80e5b608708b129abbc246d6ef45322a98ddb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USUYG1156310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ed7fe1666f8ebebbac0743e06190e5393dd8bb37df2d0f37a52f735cec70a1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USUYG1156315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745f12ee3e6186cb16bf93f376ea33647a5bd514b0b8103cf5667e46ec379fe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USUYG1156319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0872b374b3cfd4304300c8a45e4d4d17db8e4670391c2d4e2cfd51ba536f48d1. 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/USUYG1156321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43ef6740cb88bfcf5d88be23da2d384323f20d0465d9f1aad71491d863bcdd7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USUYG1156322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d3c82aacfa758465fe48026d68672f2a9426fb389d856650daa4f1f4487400. 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/USUYG1156324.