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 0xca2c248312642b507d51d812dabcd256b145e41badb8920260ef2a1555fc5d50. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99e79c62-a7c9-4ca8-94dd-7bfa778b9d73.json and https://artists.proofprofile.net/proofs/artist/99e79c62-a7c9-4ca8-94dd-7bfa778b9d73.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 0x6beec1d0d0de65f49889904df3f091e79dc5220a9ee652a5cc789f28489b5f92. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG732144336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae81524ffeb8d01596f28c08d4ecab380f1984009341ad6c040e372e8b3ee2. 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/HKG732144337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9918a6b85eb000e839afc372124056be74e6b1a0c0fc32455be342a6a431b1. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/HKG732144343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd540c54344620d342a24336156e4baedaeb92b0cc70b033eed8aec45da366a7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKG732144335.
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 0xcb224fb988b6ff980d4a2b4501e8c6c894e3b226c4dfb72442b113c16863e7f5. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/HKG732144344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2527e9efd83b21b9a0227744e9f4d5f8a7cb230d82507625d7ee27306f18c368. 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/HKG732145340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf189780f1bc9bcc268a6b06f3a1e2fffa40ff9a7f3812488697803cc015a77fa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732145343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe355c18490020f98051b9824b50c3a38b77f980f195cd322c02106affa6460c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732145346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b14ac0e75272b8ac1855458d77b09a5e74e6808c75b7d239eceee4dc3e491c. 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/HKG732145348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a758973a3f1e606ec5b4cd82cd36a707d808a899a2f72addc75495be9519020. 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/HKG732145349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea62bf393e872aa0be5a6849dfeb2644bbe30655017b350449cc1983e0ef1f6. 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/HKG732145351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2d85bf47cb9674e08b5e85e2eb76c097108a740b2e6c30b2cfe30c117e6b1e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732145352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37906a692a0ca363f09222692a17b60d231b8bf6fb145a5236b0f6b1aa4543de. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/HKG732145354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f8e5781f5fe874cfbde493795b1cc8241626955e2878a8a82073dbcd6134a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKG732145356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea3b0a38a9be1c342e3220c07f125eb245a07db58fdb107ff4527177ca1f49b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKG732145344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13e2a8d0337f43b86eb3e1244c3460e06c428266c9202d9e2b291cf433442c9. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HKG732145345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefddf47cb9caa8a57d6f23c334669a72bc58099ce5ee188b6ee61f4663f8d1bc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKG732144572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458ebdbd2ff7ff9aa56620617f17a188206573d400f620ad5f03eadeb6fd3c39. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/HKG732145357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f126dbb50a54cb567c52e5ccf7d1c7de0a79b5b57d2051274851f5b105dc8a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732144220.