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 0x56618fc969d90d0b5e94086434af4adbaa1bc841a51cd9166b4a039a2f9d34b0. 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/c20c5161-b44c-4407-abb5-5fc67749f891.json and https://artists.proofprofile.net/proofs/artist/c20c5161-b44c-4407-abb5-5fc67749f891.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 0x7e077e682d91a441dc3abd752d19acfbb199da54a2ae2970de9989eaac980e03. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/CAHQJ2327782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f2119d59104694dcc9b665a34b8b577e36a322f521e397c6a625521cbbb57. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/CAHQJ2327781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65691f18447436c351b71737e7bd92a4d964f734d53e0e5402367fba1dbf2b4. 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/CAHQJ2305636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fedd809d0087e1aba760999f8d213ad2067c2cb40441d08dee2859f082746b7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CAENV2359950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83ab92b91b6d408dcc89234d28c50ad2757625498a7a51c1004f7dd09d48fc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:38Z), 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/CAGOO2327014.
Nunca Mates o Mandarim Cantam os Clássicos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07c3ae3150780443511038fcecce34dc45e4fbe2e7313b64cd8c398b09cdf72. 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/CAENV2387151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fedd809d0087e1aba760999f8d213ad2067c2cb40441d08dee2859f082746b7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAENV2359950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83ab92b91b6d408dcc89234d28c50ad2757625498a7a51c1004f7dd09d48fc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CAGOO2327014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7352916a6551b803977b8949dacf0196c7fc9dd7e17e315e9e902e63d70c722f. 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/CACWV2476151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea8964603660129c70f9d4f57ec24074b70627a9eaed503986b23b820a59c80. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/CACWV2502989.