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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8515a36e56417a7a5f7b1fec670969f46d669a7462edf6356d3318680a2e8b4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0bbeaa1-6790-4481-b7ba-180bbea0bb31.json and https://artists.proofprofile.net/proofs/artist/f0bbeaa1-6790-4481-b7ba-180bbea0bb31.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936119806d460ed58715e939ee614731753de9ba989a2568cf467d820ba05c5e. 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/QZES91889978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c24cbc0f1bd36c83966b828d070df402d6781081360c7b18a7ac4bb1b4021c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:57Z), 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/QZES81927855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb134aabdbbcb282516ab47cc5406c36255027d9bc7da917367247a5ee7c0992d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES81927857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7cbc022a25e5e64253ab853860116e92c5a9dba246a0ecc6d43289535d10b0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZK6L2149924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe943e509b3b62912bdf620c08902cfb8dc5ce912797a24f80f494d84c811813. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZNWS2217919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431310a915aeae2d256e5428053987c7f966246068396eb02f407c04ce95861c. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:25:02Z), 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/QZVEM2313542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3a8988b9ed82541c887231cd0b76c15f281890fc3a9aa716215907d0710135. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAZ2397957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c56c528acc9af1e3f0c4bcef051d1541991176b5327c53c71fd7602f928d083. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:36:59Z), 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/QZHN62562378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfae730298a86a7a303386b95ed11b1dc67d1b0e01279896d269800cfc0b80d6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZS7J2370603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f03fc27da32eb02df6140163909128f012e9b2ecdde008e24b39495a9d3322. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USUYG1369219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc895921a70c36dc9de98037e4f7fb26c6a16ea39ccb2f343b7f45c47d18374d0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAFH2046458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc43415297599fee0e029e2005e515996dbd371c1ccb11c55f668836a7acb5df. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CH7812239819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a04f3a08035f570c3d88e1c9a43e65ded0a1394d4f8ed321d9b61da99a4dc0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNWR2152835.
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 0x1f85e98c8faa9e249fa7053452717950a9eee2155bd16c1c051eec9045aa85c5. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USUYG1369223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31d894d54b2bae7fc2084738ff4f4e971235ceb9c109efde5e9fb9d42c9c7de. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZHN42242454.