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 0xc71ca22642f28909ca3c0e4cc76d10ac11fb9005d85362184182fb4f59388c0b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34f18667-6e8d-49d3-a467-39425529c316.json and https://artists.proofprofile.net/proofs/artist/34f18667-6e8d-49d3-a467-39425529c316.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 0x31b22088ffcdd974f7739affdfd7218f8f387de8df2528746efc00de945da0cb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA61827938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae42f1feae361e594fbab374b0d661838990a14af3963c50f1f98268922c2ba. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZDA61859084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb7212da6694353f81706df44313dbba5f42080bed72e696a1cc518371389bf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA81817967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceab080f05a857ad07d327661a40f4575302e24ccc1d2a1f7ed8fc451f45040. 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/QZDA81827796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280f8f1645b1cef920b3e7c117cb38fc5d2d7b7495a8a8e2a62e5414a60897c6. 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/QZDA81858512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6551405139de4442f2c4723eb1c8b43d763dd43fc544ecb34de0b086df556f51. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:00Z), 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/UST8K1886004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b33347f127fe84c5b5424894132f99c5c448714403982af376e805ef94e3884. 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/QZES51821282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b6ade0e1d46532fae0fda098796e918d64d03c294238fef7701ece6f70bc0c. 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/QZ8LD1955607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb78de1802d8d58fc28b7b2d78229514ba9229161345f65ec99d38e26c630ab. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA71947689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d2aa9bab6701e40a81b714d3c21f2517b134446e3312b14528d204a218a18a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:51:09Z), 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/QZES51997762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d90b0e299e8cb42a7658ed827643ce4af1cc810ef1d899ae298cb64cb4a0ee. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES61921347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f9cec31310d7381322cfddfacd88127a0d65f9eacdb64c4285edd0db34539c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:53Z), 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/QZES61921348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4d1e70286d4ecb6fd313108e1f48b08e662ccce1ea34423e1653589ad1a790. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:25Z), 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/TCAEL1993093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bdd6dbff9c00591554b5f623eb2f036479cec2d79046daffcfa10bf36dbb76. 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/TCAEQ2015658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dd053f3d3bc1812395b89d47cba927fe31253e411f3fc11ec5b25951d78635. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:45:07Z), 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/TCAEQ2015661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1f60794c6794450394e653a96eda601311fc54abeb89c36e4204d137aa5c5a. 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/QZDA52159303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61966da90d171aeb75f572648291c9ea421bd70a60f661d0cf92de35993bb08f. 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/QZTPX2386557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3216da8829ab9adf72cdfd6ffdb1c1f9f308e6d2d5cfc9d4f5631a87749f53. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTVM2351022.