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 0xc29a438ee0b7cb6a14bfa9fede8ecdd2e6414180bf93d9447d3adfb02b37d520. 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/dacaec9a-e96e-4ef4-9cf0-00c0f0c14519.json and https://artists.proofprofile.net/proofs/artist/dacaec9a-e96e-4ef4-9cf0-00c0f0c14519.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 0xd8aa2f3fe109c530dc951bb0cf477acb3dd51bc5f2ee24b09218cf301fdab858. 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/FRX452103431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ff1d7f57dafc9fddc8a9f44a9abbba18dbba2a2457939709903a08ec0cfe93. 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/QZYHM2425641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcfd73718c03de792e91d620373c648681da6fa892c729760beccf84bcb3b9d. 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/VNA092402312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf693fd5147d44bc2a3f337d2a6f96c420f29cfce18833f7774175c23780433bb. 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/FR96X2474406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db06dc6b1e3e7330d22128412256ccc03a3c32bde63cbe8651c594fc74a0849. 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/FR96X2430994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84fff1f5628cc77378dba5d4e69a5f32546ebbdc254761932ab93604573b9f2. 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/US38Y2403430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2319f24d46aa7a7dc418ccac974fce77dfff4a90db707a877072c323cc5cfd3d. 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/DGA0P2317077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718e3c72ba90ff004e21a8185e20ffcecd2c7393ea93fb6bc8c2ff2e8d11a73c. 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/VNA112300838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd455734c1b5f9e24adfb3daae5968670b10bda5a89ebd1bad9fa3ce16887a40b. 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/DGA082343480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c43c70443399b221919bf163f08634c67bda15ae29176adc3c4d55b6626360. 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/DGA082343481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad701148959294bb8e29500f5ef41b627b7b49559d1f5dbe033aa085f43236b. 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/VNA2E2313067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6847355dd4f74cc69e88b9d8297a58c4888c6c73bf10e7d5ae9a909e9c317c. 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/FRX202387487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef6d94e2107456a0a9faaf2dead9ced565d3beeda96fe6605f8aa118fbc3690. 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/FRX282295528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2da9b041432eeb00a865558c07127fa5a93a0a90aea04251306a36045d89ca. 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/VNA092201169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f5cb8e72e2f7dcdcbe5b5e4b5036898f21727e670b6b71cfc499bae9fd2f7c. 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/QZN882256329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1956cdcc9a8d2098529decd63bc00b4c476c9036082a3c1c39f4e5e8b335b183. 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/UK6822111393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8b71736ebbc0ded9939a62e8f9147af18a05b349fd6c50ddd23d74c6a1e2f2. 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/VNA092200339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510687a3b092a324a308cace6a81a99933e8b5b4a19f6a8f3126cd7405b642a. 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/FR59R2276134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2c86ed8d96ee0ce5e1033ac873704051991aea9ce6c21c092931345b16cc39. 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/FRX872159595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30d19a83028937b64914359a14818e9948ea96c49edce7311bb60030dce84a9. 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/UK6822111334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c09baf80ba81518e6924d7182c1b5a578f40c77202b958eddd80c3fe35fcce3. 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/UK6822111331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7c87661ec59902e1aa5f352fe1ddd6f1f6ec422991d0ea2872e568c506d621. 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/FRX202149288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a158072bc9243a349f1be2632bd4a607fbd4b2d8fabcc4c76b530808d9744b4. 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/FRX202131574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa121b252cbc575e1780a8367dc86aae388311b7d2f40a5dcbf051e47d97364f5. 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/FR96X2110559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a12c39032f17a9ce8e1f8349d13594d3fd672e2c059b969de7c84c429d61277. 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/DGA072147431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca3cdc98c83c7dab56b23be94cd0bd9cee145709ba44fe3719de4f949940a5b. 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/FR10S2144409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2317c0bb97852b20927a18a1768d1801ef0231feab5c15dbff593fc32e4cfe62. 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/QMFME2298233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e469539f37aa5b635b5ee096d3d3ff3cc8947519a89d0ab6141475da28b3d9d. 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/FR96X2184514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f764cf7c423b4f73c0d8bdc2a8d5e9e6bd4791e823e47fc13506ca87664c5d1. 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/VNA0M1926134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496efcdaaec92151c611f12782314242285129a1368eca53ac5e015fa3b33114. 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/QMFME2244888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6518f799ffc40947986d208a783acc67c88d96fedc795e271abab1f357c18ac3. 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/VNR011026194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eff9c627126b4cf5cee0e2faa370637463e5fbc9b913e7fe16c8f7eb6ec90c. 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/FRX452103432.