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 0x6a73880cd847733dd3914ab5b8111343f8c507fdf7fd3f4ebaf436a4713929a2. 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/e581bf47-55d4-49b4-99de-303ddb272a87.json and https://artists.proofprofile.net/proofs/artist/e581bf47-55d4-49b4-99de-303ddb272a87.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 0x821f185bfd955524dd64e296921ad78d6de74aec76ba415267fa00a7125e3f3c. 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/USCGH0888256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b542f002f6f4b37d3e37abe3fd4c72201ab7ce88ca4b9fe8f19b1faec4252a5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USZZ51100539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016749ee15904014e7e3c5007b9c6a1df82c22b707b0382aeb24f41af5247ef9. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/USZZ51100535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f4fe85e1f2feed0926afdb659ab21120e511eed8a4cdb9d488e611c32a83b7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCACR1608230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9526e32ae030bef842a62c69e0080c8de2d87dc217f781b1ef1f368c260529e6. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZHN72044551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe820780495b62074175042cb385cc5b57e511fe7cb22202ecd8cf9fbbef6e9c2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/COA2N2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb126e2a10827536deaa05fef607cc5fa6c5e803933ab865cd0298bb5f2f8f7a5. 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/QZES62187015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb8e05dffc0d6aca97c6a5b495405c24912a37823c5b1c788f061751698b078. 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/COA2N2200249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd4f875717b9db495b065b4c2a7fd4c68e158b2f26014d2a011c21a15a2745a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHS2360321.
Una Mirada De Fe (Gozo Gozo) [El Gozo Que Tengo Yo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61514fafc363a0dd4cf6b04b783742d59e15768d7f3ddc634f0d0910b3b7f6dd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJL2539724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f699a877e7641363539d999970f582589b0e4f6de8263a9459599b808c36e3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAJM2521528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94212e868867d84cc6803356ca6ccd4e36c283ca9ddd9fc576a9b8d5c9785753. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/CH6542107984.