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 0xcfa1418c75ebefbd9cfc261285abb59187052e2956f669455c84a4a6d97e9b55. 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/d4e4dfbc-216d-47ea-ae9b-21f6ee23fe9d.json and https://artists.proofprofile.net/proofs/artist/d4e4dfbc-216d-47ea-ae9b-21f6ee23fe9d.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 0x495363f4b039e92ce696f9f0c2be4dbecce7b12ed0a840392d6a00428de6c440. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA81806848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34d57e1033034db44734f703ef61c8a0346ee9532aa9006a345619ba7d709eb. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZDA81806849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef63558283a93422dbf6729c8bf71ad5cf35c6044579a04931afddf78feb4ff. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:21:23Z), 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/QZDA81806852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74879ab13a5c252ff0a5a146255ab5a04667fa3a13c6520dc5d42369c1691940. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZDA81806853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c63c28f37f5236e3af7cd02beb08db5906472f6f9b97ea13cf39c77afcb9353. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZDA81806855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082dcd5379c36e05fbb1f0f276a4287abe4cd2a1269e9f78e6b4ece52fe77513. 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/QZDA81801767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed481d554bc8e7662dce35cb7b48527302abd95268f109dec236bdd0035b31ed. 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/QZDA81801768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a59d661e317cf36d7f00de564a3eb67d7e1a61f7ccfb14d464d6a7666f5c17. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA81803042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dff6c0cbffc4c441df3f7db88f756868a8d6fc9d9443134b7cb21cb8f78612. 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/QZES81804026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c9732f9f25875f2d0ae60d2d25a12838b92637de30a2642d4abad39db2c78f. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZFZ71939104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaddd72726d313b155819568473e21b778af14ec1aebb38c86d082a78e91162. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNB2137555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc085514a2b3c0224c5182a4a76384a292cb4b87dc01061d01e3b1a7a2a4dbf64. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZPLS2105201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fbe6636dc42c864116dc349215e7f44106cda21bd0645566b9bd5ebbebe369. 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/QZK6K2296877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a6e6a1b483850b234e1cbbe512cb887026f22a48e99813123de786a80448cf. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:11Z), 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/QZHN52392764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8559f7be0e556ff2c4b18cc85c9fb44f2d4f22d8bcaa346e12a89c160fc359. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:03:50Z), 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/QZK6G2086502.