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 0x6bb0623e992536e12351fef5bcca5975b50695a9b24632ada1f93d188acef438. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff95bfd0-1440-4a74-bfc2-9cbea8abde0c.json and https://artists.proofprofile.net/proofs/artist/ff95bfd0-1440-4a74-bfc2-9cbea8abde0c.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 0xa7d93ce88b4afd7c13c9fc77ec92c37362c480e049a8ea16e974ac48e4d0b49e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:54Z), 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/QZTBA2293831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7d1937c2f51001090855bfa4c6ccf493b932b5e2b6151d41bf74a9eec681b0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTBA2293832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1160c5859e0968b74337b6991193cef65965fbd13edb2807327d1514b21b2984. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBA2293833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefb4278d9be020f7fffa3261e180549d9078c42ba36411fcb86b65e0d63fce4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTBA2293834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2087647fcd076ac4970bf2f606d0df936168181a473b3e1a98d97f4f91e170. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTBA2293835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4f07158d77b675adc9c7b21bed95874d2a6d5301030349f2d5f013001eac73. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTBA2293836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b230ad4413e6d29db3ea0c8abcd600eed8fe7f881b1b6a357d6c53345df46. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:25:07Z), 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/QZTBA2293837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6537afd8bb0e63fbb91d28b00e5fa58c85d419e22c1fa2d1f01de67f3eb42b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBA2293838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece890309c9621518bde9968210796dd3dd13e4e7da123fe84c064f75a8ac777. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTBA2293839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea364c344b7f1c6c0844d75e395c6db1f1930047f6a8b4f5e97e9484c5fd268. 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/QZTBA2293840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a8f24af395370f3112fd1765c4443d1a82ebaea7b9feee5f4fd061cf9fc2e6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTBA2293841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a3b52fd0b33f9b6305b9a267d681eb18dae8c94c5da6fa52e996138691dce1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:23Z), 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/QZTBA2293842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ce55ef912423863782854cdd176c7577fabdfc66856dd453599155ef8a905d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:54Z), 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/QZTBA2293843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c23e71751449786eb922bc6bd8c7e5659235226ec65faf33a06ebe502619ddf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTBA2293844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecad4616d50f5aa965f275f78932fc421342202239ce3b4dfbccafa3cca3a820. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:43Z), 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/QZTBA2293845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3427e9f4607ac44cec5bf454e95168fee059199476bd735df6f6d07f32bbb007. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:06Z), 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/QZTBA2293846.