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 0xc4916c23b8b0e8c6e3d70fbe2b3062b9abce591b13f23eabdeec773831eeb756. 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/4436d3af-4240-442f-9082-d977b246e631.json and https://artists.proofprofile.net/proofs/artist/4436d3af-4240-442f-9082-d977b246e631.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 0xad0301db5dc09975f645770a8301fbe9226a49350ee11578468c6022c753f96a. 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/ES6081740702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d7cfef39ca77b9035dd577a35cd476da177e6260a503dc9da5d77a6da01b19. 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/ES6081740711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e0ddeb66a6d27f6e5bc348c0aec2c88af6361dbb41fa612ac9c8daec2c89a1. 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/ES6081740706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ce0479510b09677aed787a1b35fb624d29ed2f63e2804640595ab52ea6a8b1. 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/ES6081740701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017c3f7ee8bbbcd53a67e07c5ea528196d476ca36d069b5e9ee8003aef8ac412. 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/ES6081740705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05969e1f928a28483f91d0aa2bc54b8058104aa87f68f0989050614762efb13e. 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/ES6081740704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704206945fae5d5b24c4f6c78c471ae8de10ebeb7abd3f0550173705650a6ed4. 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/ES6081740710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9ab4e0a32448832c198cbdea138a97ebb47958ceb4b1c4ae23399525af40d. 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/ES6081740703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a805990a77092afb80f1710e2be4eb4fa9bfd6f509b42e9331edda6a41586c7. 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/ES6081740712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13781b729508bdb51acc99deb720657814c615243c24f25117e717a88102594d. 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/ES6081740707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2b7560ee0d73e0428dc0d193c8748a377cc7cee3f6331426a58e591f266d21. 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/ES6081740708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50683f506d8c0c86e3a9d4a05d0b3232476d96a9ee9c41a47995f15d72f80b97. 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/ES6081740709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f8a08ac59384b76e241e2942a4607d19c8bd4f070155e114944793a6e29c3. 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/ES6081740715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91ee9f41427e28851e01358d9eeb3c179cccdddf45b87756c8d21aaa5cfc33c. 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/ES6081740716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c85ac98f480e2d9f7c11f3cbf5bf1fe9985392fe8d74171d8b17f3b8a725f5e. 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/ES6081740714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab038c4f474125562c40878c01679fc351e7d8d06478c667aedb97def29978c6. 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/ES51G1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2136a10d103236bd8bfabf0ca333bc9dd5ede4210c7ece07ee0ac928946a030f. 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/ES6080041101.