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 0xc244e1310523c9dba582838ad087daeeb8d95c9906dcab68acd188ddbaae1d7d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e0b3f8a-8b3d-4cea-9a7f-44103607c05a.json and https://artists.proofprofile.net/proofs/artist/8e0b3f8a-8b3d-4cea-9a7f-44103607c05a.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 0x590fad361af52a5312f075c4740ae13b694ed7bcc673814fe710143f6e4be6ce. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARF109902787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7db747abafb884c841d46aad9201786b14a4aa019a35bcc5d505ebb627b2923. 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/ARF100900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1d6d1251d7a0c840da94da0bfaf3375d921f4184e0425dbb2b6690d7d8118d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARF100900600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3d047746f910e290958af69237b4e12025409f87e30c8b50bec37ac1b9bfa3. 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/ARF100200787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d5e1332f5a04afbf40cfb2a857e2511debbcd8dc8251d9031438720cda36a0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARF100900691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1364d4e1b98ba6d91d595e7ef7943f35d4752e426a8d79a32ec235cce428715a. 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/ARA821920436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b53fc64bd5758652619d58c162f47547db7d4d3e1771299d72eb37d5cd24888. 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/ARA821920437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c00fe39ece536e430236182c6f69bbe34b35edaa92f9c9d7afdb9c0bc452a4d. 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/ARA821920438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a81883b1008c99b28b235d874aa05cae836863abd55d06f519da2e73dbda4a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ARA821920439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e586986885adcd3a0ec4d969aac95211907872e2021c6781271bf4f3a4eb049. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/ARA821920444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240246a689ffd4607239f7cdc1b5e6c0191901d7f89b303d5c647b1ad72cc7c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARA821920446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42ecf415373703106e58b47cecefca742840c7546b457a2f0e057a2e2f00fcf. 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/ARA821920448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf60fa0add2c4d054af460fbe7438494fa94fca9bea8a6e08fe53dec93dd5f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARA821920449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a193ece8d95388b89519d9a5b5fb4dc0abaa071015dcd95ab6f781890d4e1de. 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/ARA821920458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1881dd7384d50ecba6766d3893dc943c91b925dddf6e1a7dd25356d87e589fe6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ARA821920454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f57ab3559d32c13fa49f0ae2dfb752bcc29ede8045d4d2fd697c99157ef185. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:55:19Z), 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/ARF109600471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eca8f20c7cf78152bcad34417d47b4036e4d375d4148aa41d631ae3d08f062b. 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/ARF109600475.