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 0xef8c450181d714ad373626a9ae4fc901b22e506fc422106df2fb6ee4aa18d5b0. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc0fd828-4157-4498-b8f9-8c7c0332090b.json and https://artists.proofprofile.net/proofs/artist/bc0fd828-4157-4498-b8f9-8c7c0332090b.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 0xc4024a259cb7d9de66d016ed52548a4376b207a440e9893e2699f29e585c31d0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX4R52425218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9660f54c693b89901fe27b1a6fd199af91344c16206fde71fdf786886c59dc74. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/GX4R52499458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfe285c65d2482c3bcf46f30052b30e273ea34c7fbb78151231d2a430e31adc. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX4R52430349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9199358bba8b1393b55e05ff1a7b7064cbf0a3f8f620d3bafd3fc1fec3061cc. 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/GXF972438458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de60c720e52022c0f4b97cda47bdf52b8fac59544f3c19ab63c4b25d8f81db0. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GXF972471880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02b1b997ebd90c3027200add2e1cfc7c00d1544c56fa3bb65e3ab0ea9858d9e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXF972497967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956dd56691731ec5ad89a6ae354d679c6bbde0459049a99cf573a5e10bc6fd4e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GXFHP2475092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1121a894d8d817e8c7abdc32ed0d2c337d73e7d2afb70a810999c74785a098. 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/GX89G2589803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c0be5866bbdb8b6587fd949b93c0404f8ed60bedec337052941d0528d91453. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GX89G2574557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fea77d2479b8668179a6a15dcbe6538669e1bf13258a6ae5996705dc22c26d1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GX89G2566995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760d982a6b74103bfdbec0e7c792b30497d7aa54ea13d000b4640af636e3992b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX89G2599787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721597c447f9a5732f6e7c06d792bd73baf3f7c2d9a71c038c696703ef76e6ad. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GX38U2518559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905688e4e32db16e7afe57f7edb5d0d0162f4025fe8f95e9f3154cd6a243a874. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX3HH2501793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60366488410ea5a1351c4e23ad2d1766f3671cd05838559e24325d110ed6d8b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GX3HH2505244.