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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b4204e1f272ee154bfa40b53a83ee5a3af0f15cc83aca2c1605c179b5e2f3e. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/872dded2-c44c-4e4a-ba6d-2345feab665e.json and https://artists.proofprofile.net/proofs/artist/872dded2-c44c-4e4a-ba6d-2345feab665e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd449e833f1a08b4a7f62de87f9bf9432377870fa99af316c2ef9808b74dcd5ea. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2334923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e50842c3326a765ce5a2ad5c736d29a15a40b12eb8e0197990c1b771643197. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2334926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd322eb3cf96ba2a04e5b0d41ecbbf90c5b7962626c6e7307310279b19092afd. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USA2P2334929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4661b53ed65db188af015b8cd232eedc89dd2d065d20236981f3e89e113ff1ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2318888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54d88cb12d073fba7956c4b326f1066fb03f9f0d8f86aeae3d481b79305bcdc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2318896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5994dee7fcc139f51d0ccab8d239a1c727a48b4be5ef75b2a530caea9d55d162. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USA2P2318899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c9f3d189f6b829659e9083a3c212a612c080f6aeea55a01e5b1d60b2e5a421. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USA2P2318900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690d31efbdc0303ba0fbf667c4fb2f71586fc39f869f4e4a96423b64954fa900. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/USA2P2318894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaebcd9bebcbcec6f22bc864febc93a9e68c7f33dbb9d275ff9109513826f5f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2313961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc8545112aa155dd330e27e637dee46a49ec674972d1a8822ea3f613f94c5e2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2P2313967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411d141ce1cb5cb9195b84f8936095ecfdaa2e9199830eea233df8b279416744. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2313969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b09375ede2984ba5e0ab33d675c1be01dc74a69c94bc8e2972c771cd1a7fb9f. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/USA2P2313968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c8fcd2f68a0444a25489b3166fb1a249ca2dba03d20c3e7b10f877c7cd0902. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2313963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2ae1d0b0a2d229a3a4ae8cd90b179451f3892d1653bc77209dd05a7c543600. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2313962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01d5120de517954a11aa388f171991ab463ea24f6246b37d1025d113e79737f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2313942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42566a58af277a4790d920779243443c5c1cfa61a39f7664938a7f5d1b1efa41. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2313947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7af9bf8ba1ff6bb8645a0717be6b13bcef8bd6eb61757a06f147c74e9b5e981. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2313941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98266e0e4ffc09bd176c6c67a5ae3fc5205861c686ca0dfd31b7b2145817f679. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA2P2313949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c9b2886d8cdf31791dfeca98517035b7d823e1936c7c2d86480e3f7e998cec. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2313945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49110b42479cbbd7ffb75afdbac737f2fa247e81778fdb54406120907b365a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2308890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52edb8bc480f41c3fec94a8bd52891e27ff0f308ef2641349408bb778e9b07. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2301517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24ca593acc479dec53568f1301c415db98229fb6ca7a4c6d8fb59fc4e24579d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2301520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77090e518937d4fcfbf32d8b8f4b70349f574669571981944a7584cdf2c9fc3d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USA2P2301519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d0b45019f9a0427aa7cf8a989a904024d6038fe0abd9ab8ecdd805f0add8675. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2301522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2669376b55b77bf8f07c76f541c1b6b0f353af889db8f0acfb139fe61285ca. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2P2301524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd283944dd960182a3cb0519083ddf53d9d404a8d96e446fa9ad498078751f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2301532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5968ce373915d5552b989298bc94f281f2de5bef028f008c223b89308d9bdb31. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2258394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51aaa883bfbf2657ee9c2b141daa31293bb696f75eea273435ac89f40bef8e7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USA2P2258403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0648a9cdd701f22c04615fff3369f8cf6b101c9006127cc0b5ea7eeaec82fcc2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P2258401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aeb25d4135f3d6f9216ef12fffaceb4b88c82608fa2248dbc1497531ffa83e3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2258402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e90df4129830e11ffe9da21b929b06312d5e3c519873a25e8429b8ddf6bfd9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USA2P2258397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d85d03eaaa4517ca4e1a6873a0d642da3b7d827d224024a14c60320862e50f2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P2258398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf44272e060fc8f9d2f24cc984311acd1b63faf4af88d965f19aca479ebe6414. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA2P2258396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d9efc808c7eca977c20b76a9264715e3d85f9db960fd1c3dce4f9e93bb4864. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P2258390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6eb81e666ae14616b803ec20d3af324ac7c8b73ddcf1ead0e9a77c323687f8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USA2P2258391.