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 0xa5656acf0983e15a49d48f59dc7807778633bd05769ab46b9ca2682bf6aad925. 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/ebfc810f-c1a4-4ade-9c33-4b4ed8f1bd90.json and https://artists.proofprofile.net/proofs/artist/ebfc810f-c1a4-4ade-9c33-4b4ed8f1bd90.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 0x92a712f21ed87221bb68baf6adc6793ce1e82da769a0431a6a770738df710f6b. 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/USCGJ2040091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f654d8f0982e44028ad60e54a7668e8a1f4f05b1551056dc361806ae3b07b1. 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/USDY42031269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc589c4d94e552318c5ca892be3ab3d8ee2fbd03a03b648efe366c5bbbf9fdb. 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/USDY42031272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1222c60e9259de6a1018c9a6d8b4201ffb999cae82ae9c4a3d0f02e2472b4309. 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/USDY42256177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7509d16b511ca7e7f4f21d4292bf5575d5f662ea32f9657043652668de1dd124. 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/USHM82238362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe364f3f4ff4f8fe027b233f1ef8da2e6bbab59810203e2fecd4bb0e748707602. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM82238363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339ee380db690da751b6fc1121a54208de88551b87c5f846f880e4f29fa1b9ca. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM82238364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dd34ea7ebad6407bfbc4174faa43a7f70469e99f6a7d413015cee86159130a. 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/USHM82238367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e84e7b6f6828a0af70c79e9240a49b797ca8249a1f8cf957d11828b49057e7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:20:48Z), 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/USCGJ2385253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd16ad921c91ac39dc93312c74ceaf3a3ff16c6a18e8114608e5c3ac5135c87. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USL4R2319605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6f17305a69315bdd31ad47cc3e65f20eec63c9a3fe46a841d41aa17775beaf. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/USL4R2305539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2201d811aecf0e11d1f1cc878dfbf95907046507db14dbc7d629a6e88f8af. 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/USL4R2393671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49689306d6291e39005289169d027f03467214bb675884d5e1dae2131d8a6895. 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/USL4R2393672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9787db0b5dc5002ea8d2dc50827c929c121b98449382bf2653aa07b79c7fc2a5. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USL4R2393673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90a3b4b0ae24d89e8960fb5885c1d1bd92bdcdec21f3e5af345b7521c934a75. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/USL4R2393674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4438f193b161b3346ada09e5aa9f417cc9c8e4cce70da5c85627f583cb91a6. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:30:31Z), 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/USL4R2393676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe11f8993d6182e4548f197b93c575724dfbb522eff3d950f65fdf06b3b4bea3. 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/USL4R2393677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee5d7e3915cf0005e93ed63ffd8344040dd87bfe483bf42e0244bc8824feabd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH2402018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf44c39b90744795b6984a2a42b3fd136272f53bc3d0482dd9e363d9d5a41d77. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USCGJ2420295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f21d8d5aba28040163dd109b234a5b08d140cf2d422b639d03efa034dd2cca. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:33:16Z), 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/USCGJ2451450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0eb4b2cb636302353e712a92d7e162491c0e29f13921a830a0bb1754a59ade. 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/USCGJ2470016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53db6b967f7adfdbe228b5a459ed89cc7e7db9b7dd9e0ba5385fb278b8e78cc6. 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/USCGJ2470017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a870c5bc77c7413dca84903a0be51fed612700380fe5cab022a7cd8caa3725. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USCGJ2470018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7f5777a837c8392e0465d13e0553f08965dfded87a09baf6964f40af0f4e77. 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/USCGJ2470022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94944cc51264fd7f71313c6266942669f8d64be9af8b1a3aec2cc515df6704cb. 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/USCGJ2470024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f09dfc59219e5220f1e428b175897a0e2d7b955a67112ba0ad254f80ce2b57. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USDY42565479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efbc5de85cc73087f2d2031de56cdbc18b5ea02e69403c4d8d79ddf8654dffc. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USHM82590881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d559c25ffcb67f46b4599eb71b17d327c20a20e416ac5c2d0458161695f3be4. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USL4Q2509534.