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 0x4fa7fe2547d18a8cc390ff5fe0602923b9bf765363b3514bc3e414afbe839067. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/974e5f5f-ff4e-4774-a7d0-9e17ade1ba4a.json and https://artists.proofprofile.net/proofs/artist/974e5f5f-ff4e-4774-a7d0-9e17ade1ba4a.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 0x1b0c5555f541056e18d04193bffeaa0504c1a5f111f7e5b63146ce4bfc857fc1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:28:28Z), 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/QZHN72572611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5c8beb69396760cca9af0504e96a70df845065f4a63cb82141d99ee4b82562. 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/QZHN72572612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc600acafb8e1200ff696f9c3bb5e03b93beb1977bc87fcb6757f57c05203a9e4. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHN72572613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24476f817499fe23db4c31869808944ce1401feb0861758740d89dda2e82e6cd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHN72572614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8f64561e7003c1ca08b702803e16fbecdaeb0667143a384a3f0c2465710ea2. 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/QZHN72572615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555d58fb230a90791095824349822cfc5f868c92f7ff6ce9c9194f2acfd6916c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:30Z), 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/QZHN72572616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d5894762ade9a58c6e63b61d2f3df300430c1303eed7ac7e8d1ebf02d7ee1a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHN72572617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f13c64ec06e5961d0d9905eb773b1ad62cf8f45ec902f193f305ceae1e64cb. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZHN82574865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4328e52232e85399511aa9c42f3002f8fa69420f7b53a7e77c68b770b1730253. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZK6N2536328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc07455fd8675e66efa719a54577f1e548a96a6250683466ac6d8b521cdeb84. 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/QZK6N2536329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d48f2968248f9e07a5ec090c3793239b29e006c35b77f876062134115505d0. 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/QZK6N2536331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff6f1257a89d455c3fa9c61b7cd6af62eb36ad065bcc6b96103f3335602ff9e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6N2536332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba5220db1dffb1600a3624718e0b6d408f93166fe546d732e8a92038e93054f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZK6N2536333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa247bb6a42638c6f570f0bc3797c0b2606a3897889c86d4bf9441d6068999bc9. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMEN2523949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8a3f4a8ffdaf11309afba838033549a659c7a677208cc5b5b071c395ff6f91. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEQ2508009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c799f318c5df8bb0e1f85a59b2314c7236f314a9fa07f9738b13457a2dbf22. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWZ2532490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cd2126ef13fa5666a727d68c3b7a97ea8ee9645af306dca42272659ba762c5. 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/QZWFM2522440.