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 0xab7586fa5980e599d6ef7b034873feb19cedc5b89d3a94fa710215ac990c255c. 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/14f66967-ac59-4616-9abf-bb86f5c915da.json and https://artists.proofprofile.net/proofs/artist/14f66967-ac59-4616-9abf-bb86f5c915da.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 0x8e265ea88ba9ebbb1d737720596539ff65e6f3f2ff29e89764333c24b2194da7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZ651332656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10f2718a603f7707406dbca9caa45b33404d04c01e85974837306aed8d4aa41. 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/DEZ651332657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14dae5c06ef68b66c6858e373ed5adf71d5e65ce833dfa866f542681152d542. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEZ651332659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5f67ce66dab054ea6a974e29e114d20ed16d1244989d852062150308f7a34a. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEZ651332661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d6ba0bc125667b3b6abb5f64c34c7f428a1bc1489b4f5fc4bbf2f2c2834776. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEZ651332663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f7d8061b5c25b0cccb2662eca2a0e0e748e83e8a057760f253a7b76abc2a2e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEZ651332664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4df4cb2757d98afa96c34f76f6c8b36dc0cb6db3c246b6179f4938ffb5d7db0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DED831501220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09636e1df131ba7697236ef85183adebbd69d6c693865baefdd27af618a11caa. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DED831501222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15010d663cbc3e56e21b74de0749598cbcb0424f019f87ef39e4a36254424413. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DED831501223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86524d001b6bbc6aac511f8f9bf94be6cb153474ca5f2e079147a5ecb7ebc2e0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DED831501224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d0d4e1013a8d6f57bb6c963823597c53618cf480f0c6502ff77483b0df62b4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DED831501226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e22a4d85ea50d2813cc8b6f0501e57adcbfda07f7fc86de1c5c1466eed04ee9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DED831501230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01da775bc83eeec97c4eddaedf5b2d98315b98399e3dc12180e8ceccf1931bd4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DED831700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e6a13d9e135b07c702fe675a27868e6950a5ec7269a22816bdcd4d2b7caa32. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DED831800447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2c3a9747f12e1be8c5a96552338dcad0f7a37019ef3e131a54c65390115d2d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DED831800439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a87cff44846f15082d767925211fac360cfd582ffc13a829a36b43df3e47194. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DED831800441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9937e6b5660775176045cb04702cc3ece256a4532d84a6b4c6199042c411384. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:17Z), 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/DED831800442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe56410ff4bafd25eda0c4497be72928066042a494c8c51737f8df4d612cd60. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DED831800444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f0cf78f6a580dde573858043a8ad3874fdb52480ed25713f36090ba8c07e2c. 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/DED831800446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7f0e296a017c676be702963e33ea549404a3483f269ea89b0c9cc7916caf5c. 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/QM6N22000815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae8659b9713c11fa3f3fc7ce783fbd0429a33f0a49e84b1576edd4b5f6a802a. 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/QM6MZ2048160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e1a21ba20c48d87b1c11801290f0f201d7a0d901587635b5d44af69c3da26b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USMBR2215397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69743848e2d67b73e507a2a5c9365257abf9eb62cf53c6d683d22e7127759542. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:22Z), 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/USMBR2215398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab12c5dd6b665e892b4a4cb0fa53cc8808f3f181e049c35d90476dc946f0e0b4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USMBR2215399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b32345b4001cc6511da6bf042242d2795b98ed02dc4deb641a6d89a02ff0e3. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USMBR2215400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7097229ff764f2c9e062e3e6e2533e36a3d02e828749e77937cbe860d98872. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USMBR2215401.