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 0xdba9295144b7e8c32de25020f0994b7fc1942808bd2e93c14b8961ccedde1ea6. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b3ea87b-7677-4a15-8a3a-1e58c1a17658.json and https://artists.proofprofile.net/proofs/artist/3b3ea87b-7677-4a15-8a3a-1e58c1a17658.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 0x5504355e5cc89739324bf3c61dee1a6c4e9a86e9abcd14ebf7408f94cd71e023. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QM6N21532331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f75adfd90ec65cfe323c2bbda839b51db411877c53649d061c68ebc8518cb1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:33:15Z), 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/QM6N21532332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82da263c23b5255a3a68731048372a678e3d1cb1fd6206c880b987a259f97fae. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:04Z), 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/QM6N21532334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690899370dd7d5b4371188662f552a2343b65e73da95f0e4ed95e59eabd51d07. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QM6N21532336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc8fd46a455b2647b69a7cca418c59bdcab73bd5341b21b6a214056c14b3ae2. 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/QM6N21532337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6ce4005777051839f3e93acdb04fe3b8a919e153c8e7e4d05c15931c24cd4e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM6N21532338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088d935fb0ced1a7103a96e28ad3e9a0a6dc4bbdd38f4b8ca50ba30cb1b8e961. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM6N21532339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b3559dfaa37a30cfb80cd8abf29128665d9526742382cf7119399010f89d53. 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/QM6N21532340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40947316439a46e5e0b32075435a15cef8f2772e0f81217670cd4aea57a15935. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:11:04Z), 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/QM6N21532341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee05ffcaaa67389ec048770e5e1aa7fa8c7fdbd7e60666c9ae6c53c2e8b34be. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QM6N21532342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe95058522040a7fa26c8363e0e6fb8ea8b9325957b53f2fe427f71a412ea890. 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/QM6N21532343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa6453bcece41ebe2a7086cc11dac766d75a521c51b5aeb47a40291ef7f6a6e. 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/QM6N21532344.