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 0xcc42df60e275a01fab73a4d1c732c3640f1f0091042b143fbe78d1ac4d101223. 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/27331026-a21a-43c8-a2b7-c1175936bf60.json and https://artists.proofprofile.net/proofs/artist/27331026-a21a-43c8-a2b7-c1175936bf60.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 0x1ffd545c7649ca4d1fe6773cbd4b38021a6ae6484ce861fbae0e8c471ae7c240. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5W32306811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63daad58420a7400ba7d25ee5194f5fbb519c00b38cbb91c9d193dab38165643. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5W32414678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44fb86c340d1f0f816622b48d98737967dbc4729ed739e7bb8195c8568fce729. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5W32414242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc476cb42a106bb232d4265b1658be4e594ec5b1c3dc09788cbb75d43c564f2b8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE69N2406055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b34cb3f631e3ea82362a25d46fe26ac47c4690857b74d30e282f7ab61febf5e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5W32405984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8ed624f117397744a3c21ed9f28706753d795948747403b9764daeeeb1fd33. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5W32405904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84412ea07a9e33b75b32756246dcef5f4d0a857b5d397a4ca564ed3bf6a6a5ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5W32405511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419cec1b05b80e46ddd976808ee84c098cca26afb8df26b714937c48f4acf0fa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5W32400277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65def78616a60306fe7f7477439454014426098cf877cb7a53d2ca7b6f119a1f. 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/SE5W32309782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ac2005f8a3fc72e2902b4b8342a8f4cd4a6012d5703628801c1fe7120dfe3a. 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/SE5W32309592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf96b39e3054b317f0801fba1a09c35b1d823b8b197fe128c80633aa7647bd85. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5W32309101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9794f8ec1d6b27a88573019e2f45cd0d9507f755a7244ea3a4b6cf2336ee08b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5W32308168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2769ce3a1393e5aafdadd1c45fed4d8011839d7d482ead84bf91ff0715769c8d. 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/SE5W32307384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ace92bdc5b6a6776b12ef2c8a904f1ae46d1f5cd0ebc7bc417128383c80bf8. 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/SE5W32306328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd88d9186456cbdf63145f1e16b95b3ec81d7998d255b9a57753583e0b681b0. 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/SE5W32306329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dabac0f03f1bfd94672892efd41c555368f31afaf8c9909101bc1cdb1ded49. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE5W32305753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8154da0c2cfc7790486b15b0055db446643b56817a5aaebc31b1d3b4895f8d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5W32300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24950a8d09b997e017784bbf786290b788cc57975b544faa27a75116328feda8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5W32293777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07452a356f819f6233efc90e63ec4d7e1ff3ccbba143ecddb2f10209071bbfa0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5W32203167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb1927da97977af91c8487b34feeeeaa19b194bba6e38886bbac0e651fd0aeb. 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/SE5W32202317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc894c0c4a5e8f76d3a9b507877286c22012450cf796e71cedca9b098142f551f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5W32201969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4021b343fbb8f542574bb7790a17bec4828cd2c57823a6adf60be56c48b6c33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE5W32201622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf46d9a6588ce475b12948b9aaadfd357e9676e705a115846d668e3acb99ee99. 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/SE5W32201266.