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 0x7e3d69412fc5b02677a2bc06f5c10f366f7c72f45973e27ba2c0e74de7392425. 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/23631680-c99b-413a-9041-9439137dac72.json and https://artists.proofprofile.net/proofs/artist/23631680-c99b-413a-9041-9439137dac72.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 0x1cadc27f1cfa9da963a447d7cfe2928680d39abdc8e3622e247aaaf40d57b476. 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/QZNWW2238426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4551c4640a0030bb5c58c1100623c635a7896d22de5c0d85958ca8f2aed339a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNWW2238427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364bbf326a9ddfdcf2e2aa2be526527612cb71ebaa786104ab0c122ce4e21898. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWW2238428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909c60cef39bdb9331492a77424cce7d7316daa8966e92ae2b7022b2474747e8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZNWW2238429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c9c315110fd9eb18a85fa293f7c79997709dd4f7a6c09a5ed1f8378b56fa2c. 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/QZNWW2238430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991d68c3c82bd568ea1bd8d43bf0b64126a47346ae03b5fbda09218c069db20a. 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/QZNWW2238431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16788b8dace8b776a6f323704c332c07f2f82d58804177a5a8511e0e277874cb. 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/QZNWW2238432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67213517c58e77522b951d01b1283f616cb8966f1a5b0ef4d470ac318765ded6. 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/QZTAU2462416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ec3eadf1356fb5b6c9ba01a2d831b52f8d553126349bbc653da7edec46b12e. 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/QZHN82473426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb611e39c9cca8b96f786128f2a8799454065730bf34d0ce2959ffdee2f5d6a4f. 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/QZK6K2496040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99cf779a3e9c10308f0fc2bdda75603105c8448dbeef330bd2940d8af8e283f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZES82424256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd654ebdcf5c70150539167601586decc2eaec0d849cbb587e0c642b23697fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ42478336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a8f6f851be6b9b9cece98ebd2a351a6b2222e356e806a9bc4e91ebd8d1eb28. 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/QZK6Q2347494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a97af9160490a95389ff1b148346e2305a5db20ffb087eb173ce9f21182d954. 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/QZQAY2369545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d94fd5ca42c7ba94df395acb925e409241a49729aeafe282ed0642269efa529. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTLA2304589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0934de673d1263589ee2905dc9ccd51170aa1b62870843e13e07907c10638c09. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM2325810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3ad5a21fbfebcc48556aa1b26c4d91199478244d285c6dc02f5206621fc350. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM2325811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e27d891cf080751e0a52f59badc49014d4e19afcf9e481b23b0d2b7ca02da6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS632352794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c8effe4be6b1a7bb0f347acf288bf8e9bed2610deaafc7b452c3aff4f4f9e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZVEM2325812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884ac89d056b6537cb9c9313959250ea83904c5ff52c8e8ee7c088b1135e051f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMHL2262686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f90d036ddcab3f40e69249a146556a725f65949a464a2e8149bc6fa3f5d5a4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM2325813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaf18383b3fd43c7f88caafa572cb3a1d01398eb3f3457a7bdc63395e61ff6f. 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/QZS662206365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4f96dcbf32950e92678c032a75358b02f360fcdd5c6722f64453564e6999ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZVEM2315742.