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 0x680ef5caf80600d30f077fe5194ab4c06752d63901dafb9af079d53006c81ecd. 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/83c0ebec-0bdf-421b-b1b3-386c16400313.json and https://artists.proofprofile.net/proofs/artist/83c0ebec-0bdf-421b-b1b3-386c16400313.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 0xc69d78d2dfd1daaa4f9988a98c7a71196f9e172f06da5c2957dd473a99939b6a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GBLV61814345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7a2518218e79a80ba70ccb298f288a0524a78f15d1287c05921149aab0a031. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:33:36Z), 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/GBKQU1943159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaf2893df2a9e01bc22cbce8cb162637ce605e2af8ba275d8e6d29c0d22fd12. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBLV62016741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547375a396870be0fc30b7a71ba0f60a5648b516f71133070ce58d92a07a93b1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBLV62016743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c1b547fce1306c4e95c452c1e9d7e9cad9a6474fdd9ff7806e774171eb0241. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKQU2150240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a6df91a5b60b06cd45b70f159cc3e357c676f75069003f77360aabe602710f. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GBKQU2150241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005bfa6e216dffb464026ee57529e859c783a07009099dbc937c8cb11e90569e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/UKEX32130300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdb1ab943d9e37b833738c06185ce5fabecbdf224f914f760ec5015c187c065. 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/NLV5Q2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebbe62ad2c4cd2181b712038488ce4d0fb05e64e3b139b6bf2caa0551c132ad. 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/NLV5Q2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d85bf229c16d26537157ca23e80d290094aa4d84efac1305652db13512f902. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6542233775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02208764b352e3824f3b090fb5a2e6fba903cac2fdf6ad8cc6a39379e5806f2a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CH6542285713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de121f5ee3017e3bab7e4a906dee6d5513029400657f5fdc399ebf0fbb23a9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542294979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1d1070b7019b22e833e6e706152ef70acc798311ad4c3b694cf82cf9049526. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CH6542314072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe552ec27d7163e91b17e49dfb72096884b46a1ac5ce5bb92ef4f0538c5336f21. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLV5Q2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0266d05e3a07d20a324122cf79b6ae11017eeeb08b09237f87a0fc709838150. 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/CH6542314077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb81e063e7eb3ccba5e165e96c9e77370c098b4cfd3707ef3c0a3b3de8e1308e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CH6542328714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546f0a3555b752b84f41a2d45e7482b6f41a33c9e699460d840eb596731438d8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/CH6542328712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f8aac73f2cf2199a44c7b284e6db13d76aebb57c29fd593f023817320b52d2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542328713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2626d01eb1fa07f1f8ababca11117db18a466d0723bd1538852572d25b70f25e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLV5Q2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd233f5acc96368cda44946f29c35e43d6a4dfa12d0f1338e9d947aba04c1db1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NLV5Q2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906134a04b2313c08ada733bd2968e4e9a408bd2c09dece12e2cc557c6f81e66. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:46:00Z), 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/NLV5Q2400018.