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 0xa1125677baf4e7406d6830b666c94507b5699c7c40a4ce7e4acc8671a071ea89. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42418507-9ba6-4706-bb18-3792e60ef925.json and https://artists.proofprofile.net/proofs/artist/42418507-9ba6-4706-bb18-3792e60ef925.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Watching The City Lights Through The Car Window
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 0xbe3212b721e92d84e15cb4607a3f8afaa63c092e769dc81f7528b22cacb14a30. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUGBT2403927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3af47d336298774ca6533fda0dcd273e165b2fd59faad6e8839cbf12bed080. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUGBT2403933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa234b054d35ab5d2290567d2fb21b7ef36aea17c3dd3c09aba81318f767b0cab. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUGBT2403934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73fdd200d16ed68cda8b26b6c95f588f1456ef3a9f6843b721b41dd54954f99. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUGBT2403935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5557eae35d6e405b0cd039d5db0b8bccab703f219acd51b55288ff8e3815cb9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AUGBT2403936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e5144aae7daf9f2f4c94e397d4cccf514dffe135bd61391eee7227344f6e1a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:18:13Z), 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/AUGBT2403938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af3dd433e5b9e171b8c12e83d5204a64e42f2cc7915985e4186c6d0ab8dc33f. 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/AUGBT2403939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5505890d140f78e764d7de222c731b3e0851f253842c20cad08657260346233. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUGBT2403940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb3d2fe246caa44dfc5160cb63036d36bdd550a16e82d7788d40a710bc7fe7e. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUGBT2403941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3a766bebd375f743f202816145b19174a4d5dc463eccf8be71ac51c147bd1f. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/AUGBT2403942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72bbd6da282b32aef787a7905d8e9c4c651c2277925589c3e35bb9ea44ab7f6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUGBT2403943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b0a8143868dc1cfe5755a9ced55fae17b9f3f0daf5a0d7feb8741aeb6d451c. 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/AUGBT2403944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141c282163acdf1567314669a732b7046caca7391caac72b81d7b16919c492f8. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/AUGBT2403945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf589bd61be8e425415d958e20a3739468957f0ab6a1ef194af399ba1f69f4ab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUGBT2403946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3a44825ef54b589544fa4de2b68c69bf81a44cbc7ee5aea5fadc1e9b6b5c24. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/AUGBT2483359.