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 0x2ca1ee6db86e0c23b6b60fbf59232423736e17c74af6bda46cf41c17e8454484. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21ad506d-7653-4b5e-a70c-a3fa0a52dea5.json and https://artists.proofprofile.net/proofs/artist/21ad506d-7653-4b5e-a70c-a3fa0a52dea5.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 0x326dbe5cf5205a29edcd65fb666898c5cfb3b6889fa60edef18ae8676e1f06db. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:06:44Z), 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/QZTAU2372032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0feda92b7cc0a18fe03803adee54a84f7bc0760a75ad74008d674d1709035a46. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZTAU2372035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c997c7b00bc19193806ff39dd5ad7d62a243b2f9cc6c43b48722b92ded4df8e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAU2372037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b61a9ad738ae2d1d7298759042ec6ac7870e273a78b5ebeeea8e66489d3615a. 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/QZTAU2372039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e2abc02e333307dbd758ea17014ed262bf2d0f5cbb1c0139b47d7173fad159. 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/QZTAU2372040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49cde2f8b566dddb76d34e074c85c1121243a6fe0c5f7da299f002e02078d2b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ42445072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80837c1a84fab1be177a2e2923370c56a627111c721ab145e8a9694054b1a1a9. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:17:52Z), 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/QZNWS2472547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff2285380e5ff308d85077facd6ffebdd47b5366eac3e22198c181cbb8e0eac. 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/QZNWS2472553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ceead8ffcef7f47b6c44d72c2668c5d3a122884c4cbf95965af845e563bf05. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZZ782499600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8788e7de1e276f7271db3c6bcd2c51204bc6e52c032eaccd7f84e7bb72c152. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZZ7Q2491405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b67795e812159d25492b0a860d629ab046f31bebdb13d605cbae1d8257ff8de. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC2578796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1449f59f7819ea4a8af8eba3b1687e081c27d254dbf2e54f0d2cc8410b82bebe. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHNC2578797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09790fb32a2ad43b4344abd2510b15a2a99c922cf2ba22882e1f5cb4bdce864. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC2578798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3d775cbfbc58f1f51eacb295abb04fbb0fa48844b553a0207e022f733c95a4. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNC2578799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a64e38707356711b5965dc2b7335eb2ee72876957dbeb3e90cc0b9a237aea55. 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/QZHNC2578800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851e1186720c9aee31520596c873b7bbf7e4fae9da6c4a1ebf963ff4d00db342. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHNC2578801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0300bcbdb88cf4744bd80471eb32e19b569ff766d7e2635f07020f15a43f58d1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZHNC2578802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a6d7bb310f52dd2686c1830e11051daae067cb51260eca5c5de02a5cff1d0c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHNC2578803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9062a59f754941d17547d4a0a4668b7719ca5c4c960c1d931a75050b5b7975. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZHNC2578804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe63a1ebdaad552fcaeb72a743bb285d72af82befa2002be4880db95ee2260a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNC2578806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc704d27632bc2ca894fab7348345a3e113c000206bf34a7704869d458df76dea. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHNC2578807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7916fdb7dbeb2543e5c421e98742c9242db7116229fc483a1e5c0abc2ca41929. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:53:27Z), 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/QZHNC2578808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c13c0ea259a7abeecac6c84739e060896fabc2eff0336ee82466f6a9a8438dd. 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/QZTB42551538.