thumb|1921 headline in the Washington Times: "Airfleet Ordered to W. Va. Battlefield" The headline is the text indicating the content or nature of the article below it, typically by providing a form
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 0x4b55ffaeb07c21a3ee8e9200a4981185d2588f2006b4110c795960e4d6794a2b. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/615c448f-b3d3-422b-b8ca-49b579637d15.json and https://artists.proofprofile.net/proofs/artist/615c448f-b3d3-422b-b8ca-49b579637d15.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 0x396db2374c1433ec25125f166ab1da872c0abfb453342bd58a558c722387bbd5. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZFZ22087897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3731ee8c42ec8819b31f4cae277509a6edcaa8caa4df45da31542e2b65014a7. 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/QZFZ22087899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb866c69df7535c3477deb5b5cdaa61a9a43a694206a1e4932cb54339e37774. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZFYZ2087659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f98610eb1b61432483decd37541bebfe5d32425afad8f96fb5da3d5394a837. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMER2028791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688e06c7457358ca427b11bac4bcfad9518637361c6dfcef19e5c6c483343ac8. 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/QZMER2028792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ad286e1c716602a44668f0692cbf78105e12b8c4d80263916a8ef5031fe559. 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/QZMER2028793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045b94a38b77ab80df415852b045d750b2a074c93e328baf65276509cb0258fe. 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/QZMER2028796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6875fbf27d937ce6f2ba05609cbcc7354857f5c3dcf18d8aebd2fef2e5be350. 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/QZFZ22219298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a05c63abb35a92f5d40376dd08a70ccd503ad72e3a30a59a7c9d7ffc54c81d4. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZHNA2261365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91de935fe92921650228f1302774efd3233a6eeb016d83cae5f4d154835c8ab1. 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/QZTBC2392767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9b92d228f4c9d881c080577692e2dc99459fc87620055f8ee5ef3cc1385eb8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES52405821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2efe8bfbc52325f687df5cb7d33c91e246f12469f8df6b7a6e1019b22d501c. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QZTB52455432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a6cbc4e71efe6c9a7a5d31acd3a4db4a94e8b0dd2047eaaef70cb320a988d2. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QZWFE2499192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2efe8bfbc52325f687df5cb7d33c91e246f12469f8df6b7a6e1019b22d501c. 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/QZTB52455432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f4081d3a53b52dde2f7f2c021b0068290012431cd9f5bc5af9b6277a64e1c0. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:03:02Z), 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/QZMEQ2516835.