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 0x126288aece7f183c8a03b369609be2740ceb04ceab02b2b1b34b7d4843deeedf. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c126181-2d14-4744-9a06-2c1c26170fd2.json and https://artists.proofprofile.net/proofs/artist/9c126181-2d14-4744-9a06-2c1c26170fd2.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 0x74f8272e06b7bfaeb278ca69440c7f1a76edd5ab80c7275d0460630d81c96b0d. 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/QM6P42204356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5513703866de8abaf4a8ea5edf4af975f480de7b5fb89f936dfced47e10093. 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/QM6MZ2451132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840b049b8a59e51c696a075a527a1a50cc5ddc59d91edc01bbf5b7ad460a10c8. 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/QM6MZ2451133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7004eff2097f36eec79707eb23d3a5203d8ed16fc41ed7f02124b576a733877. 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/QM6MZ2451139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6594b600ca94ea9a77ab62d5da1679ed3d266f3a202773829b7c87bd154c8fc4. 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/QM6MZ2451140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e6150e2693e3a31bc1cbec5a0a308f2f814a16a278f92860cdb6947e963cd5. 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/QM6MZ2451141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0425bfde679dd57131b7707cbc38a42e42aaf0fd81da639e8073bccabf86ace1. 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/QM6MZ2451129.
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 0x0bb76a2b5131d4d44c2e2357f047cd97c4ac00126330304e631c39b69a8e2fb2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM6MZ2451130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf21d1a9c36f96ad327772e48919fe161dd2d399b8980c54919eb2b8dc548d5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QM6MZ2451131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d9c75b06761b358fc48b57dadf00d6a03e19cc12341fb538786f78c0ddcb0d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM6MZ2451138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326cc393795f04dba9a32507539a68547b77a59ee06a1a3ad2ed0e383375488f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM6MZ2451142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04cfdef7168b7836cd1c1c8693864f12586738e0ab5bfd4d2ee0dbe272ea42e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFME2402508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc8afd9094db7cc51a9b4da427c43aa56a00108086502c610e172c0a75f2491. 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/QMFME2402509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f81751369508fdab5880073d523f28acb4e30872704c1eed1e1e006bad02405. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QMFME2402504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6acdd565ea77c7dd1a97b3328d7f3758968dd8888f50348401c87fe43683266. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFME2402505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263c9a9425385a06e64bda1f55556da451200f7025c2613558ccc3ab90690d38. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QMFME2402506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341dd9374367dfac9e25a54b72404cbd99d0b1ad21ba117e04a033b987ea09ba. 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/QMFME2402507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11377ae2bad6bfc9782219b989b46d01ee35c9ae86035745d9ab3ac5d6d1ccd7. 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/QMFME2402510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab8d64c1178d4870f99488cdccf91f08dbc09fe9a17c1d8fa049d2e600d37cd. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QMFME2402511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836720c2d594cdb48e2d75897a95da15cd9770806cac3af9be5bbc09b1de9f00. 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/QMFME2402512.