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 0x72a9e2338fa32119d2426134fc23b262bd36ae3c99d52a2aa247fce36b6361c3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab449c49-13d1-47cb-80b7-b12b01de4c86.json and https://artists.proofprofile.net/proofs/artist/ab449c49-13d1-47cb-80b7-b12b01de4c86.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 0xc71575b185ff7eca37ffed3d3d181991bc526c181ebdb49ce736418310147b5f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZNMZ2202650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ed820e095edd98db35e1314257404d1678909f20868fb784f4d7472b3be187. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNMZ2237914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff92667f4a53dc6cb2779c3adb125099d17e55b6e2bfa0b9b4d344919bfd79ec. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZJG52329589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e420b7e4018658560a2e1b0965130a4d95918c0a32b1ee22b6fb1d92020f6a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:23:25Z), 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/QZNB82383996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15d51f5dddb0b12e1492257a6d61b735202a3d2cbd59cb51c5f52a252932c06. 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/QZNB82383997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7fbbd2289ba44cac22c6a51190328964e4ac44d1cedb6bcf14d6ff614c83f1. 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/QZNB82383999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef6c547df5134bc5632b8779afd350a9850a7ee693bfad4a4d863b3b611e03c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNB82384000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7164428bf5462af9624053cf70c35359b919b8b4a21f83576a408042c7e87c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:38Z), 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/QZNB82384001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09cb85489af868b7a0492e03496731e446157aef9c5b8a701993817ee0351172. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USLD91749339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfabf2c492ebf8aa0f0f671b63b442534abcb51125d39b9ba8e8f3b05eaa4f73. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USLD91749491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3587e0834fee7759f275ec5415120f9927fa57c5d7a260b84a998d7438f103. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USLD91749338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe760f730fc8cdd9c4ca0486a83b0e8a5c755de4ce541509a65280cb796edfd71. 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/USLD91749492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa385e44068f5dbbc5efa7f9b63c61ea30423a0d465528c9679d75e1f6651e72d. 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/USLD91749494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419734d156b9878a9503b78e25505679dae02ce53f95953684b0bbde2b11273f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USLD91749497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb1cf5434c22a80881b7e49fd79d1da25a56a3813fde3dd6e250ac8ed83a3c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USLD91749499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79203e9e098aa255a821ade12a9352f90e767b1c3405ba058b3ffd51ff8fe0d. 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/USLD91749500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bcac69430823e074b2aebd42da818ad396dcd84f5bed2a1be6095d98856691. 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/USLD91763207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f760214750bff375e3a778153569d40c020327d7895ac06a87e8dafbff2fcf. 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/USLD91766019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1d204c6b2391fe1b3bd2de29238317ec35f2ec086a1e9a40a962c3b13cc86e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USLD91766020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ddcef526258b836ce75a2c44fd0d64e99892478e85d67eb1e849827d26abf5. 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/USLD91766022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5a699a4603651638a8de673106b0cf3770e98f5bb603afae22a6a0495fb9be. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USLD91766023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01571675de93e70c3bc383dfc44663d7598f08ed908169e9aca0255c613df4. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/USLD91766026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dce055ecc43abeb300387823b6cc546ded330709a149f76ff5d04f86336f9d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USLD91766027.