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 0x563f17e12d50b6adfd6021e52bf1e0db7ea714be3a4571b8d7e0c6894085a22f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9facb919-5014-4b24-a5e6-3737bb2ecfea.json and https://artists.proofprofile.net/proofs/artist/9facb919-5014-4b24-a5e6-3737bb2ecfea.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 0x502b7bfeefa459e769ea596bef35baa9b3f20c2908fdd13c826a9da4e57b8b06. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:51:45Z), 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/QZ5AB2119897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866a5c4339382a8da3d143002aaac37834cdad9c8594d17e386714699a8f0d8c. 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/QMBZ92153901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dae86a802f0bbc1761181769009fbbca95e5fd3c41cf739eb534e79b7f31d38. 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/QMFMF2108187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321e135a48d4632261f6987f9a62749bc108278ef427ca2d0d5edbdc5f5a7048. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM4TX2228935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3c078148a0a7be00c9aedbe1079cbc7bf5fa5d9468acb76a09e005381be5c0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:33:30Z), 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/QM4TW2298330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdfdc8d47e7d9ff18a5d9887c41c427a4db563eb3b7ee8949395699c85f8924. 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/QM4TX2262534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff3d7e3038fd54fb673b613aa672caea2868e77446a8dcfb5e873f744f34416. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QM6MZ2208333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09af50ef69c04716a6242ba5b6797b5a890811919098298643baca35e3588c2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QM4TW2304335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8f5a1746faa69ac22b3e90d3e06d49ff17ced68fb1ad1605fca5d9968e71bc. 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/QMDA72297722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bde5367ea80280af4175c043fdfe22774b2bb67f6494e486a964f8a1bafcf9. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:17:21Z), 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/QMFME2357052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e9303a10802a72f2f4dd2aaf91960eaa478520907417d28d777542df752712. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZGLM2481896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc6d9ac79554340f7766e050649929dcda7b54148526a27eb0c63520d97338f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTPX2421819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f911ea4c6391e97f912263de39d6f0e0155afbd05605446566a5b4a37e4432. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:26:21Z), 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/QZW9K2480968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90582758379e49689e069a4698876a9faaed14e1b1c7178301c11a3137a0f850. 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/QZW9M2472425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5a513e59fabc2f7c4b80be02a77fc0d978e6afea1093ec1aac9e42b2a8a28c. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/US7VG2545782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661fad94f03ae3de13da9a495bfffe586264f3b4661b160b3afffc86f95b9136. 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/QZGLS2528653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ffda6b02ec338876046a8ebcb6f258b63843dbab926f807f48a747574ce9b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJV2594921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf733654a5afec6d77551da7e87f6c28ba6de2089ef1e9b021936de422db4fb6a. 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/QZNJX2539226.