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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 0xe552e44981a165dcc588a39f8ed9cc30ca472523763eb29d3d3e87b2cec7d2b5. 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/b703d132-b58a-42a9-a57d-41f5ce4b0eae.json and https://artists.proofprofile.net/proofs/artist/b703d132-b58a-42a9-a57d-41f5ce4b0eae.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 0x1dd6c50344a44a2290f2dfe0f367bb255095e171ea2b204027d3d4f050b42594. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USHM21121563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fecd855af87bb954458cf9f61e1a85b7b3226dc1f43a09b832fc765a232c44. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USHM21121572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa682d532de79dc546e95f74ce4a1e44ed87716c7cd859b7930df2a2eb313246b. 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/USHM21143955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff36f4f2e8a8a26ec8aea077376809d9f229f589b4ee4b0597bc4a3625cf8936. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USHM21143960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cd92be2ef8c668ab374a50066a3e00ac3b7badb9decf28a45188d0767b45e7. 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/USHM21143963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d3e532f250fb19da4b8cf11eda8594499e3a67ed0b2b66753fa0382dfbce3. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/USHM21143965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14605828e93f575ca481583c9d64a4c911e7965e69f89185114d339fffa57e64. 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/USHM21143966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf446614138973bf25b7e20e7272383e1fc746de49aa8743a980bd0345af0b374. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/TCABO1358380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d43a210fe4bb9240481be540355352223e1c3d493c973804c7195dd81b0d22. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCABO1358351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd83ca2e199a42a2270a877c6450bebb2434faba4705b2e429593ac416686937. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TCABO1363117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a8e62f452ad9eaf3ee7736409eb450cda167785dfbd26a0c36aa09b422ed48. 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/TCABO1378458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca82c740888c1d26d95ecf443b70d3fe908af4735072b89e4d07f8cee7115dab. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCABO1378459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4f78f2dd581e32100d507525fd595013d255f31de3d73628e557526129d876. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCABO1378462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c4bb3d651f7372260c988664bbf30cdf0fab2e09ed304fdd6765493fbc650. 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/TCABO1378466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58557db46f004a5d75608e600ea2c37a889ea631813b79fb0f6a43fff4ee79ee. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/TCABO1378314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee9fd645f155a4c3d603fab2d184b5c10ce81ed43048fbde8e9981975b2fa82. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCABO1378321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e7df13b7ca70fc3ebe25b910d551a36708cb0b91ffe1a889c75c6cc31a6aff. 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/TCABX1450178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7150828dde60089be5cffb7281ceb53f955de14ae7685f754bef86aca2aa7e87. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAIH2491347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd279b64a18e56288f4ae5a9775640652508403dc018209d4298ae46e1ccdebb1. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/TCAIG2491355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cdff09f6e320876c53d796a161d2e2f49226d83d4b81302922eee123de0332. 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/TCAIH2491358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9fe39190afc71aacae98eddae49e5356b28a704ce0a0c1035600f16b8251227. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAIG2491367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0651adb1f10ad00d7a228b16874ac8dfbe7c9525abce753e4b73f77b314056. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIG2491386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1dadc55c987d7f18e43ecfe97d455f84b5b9b698c979ce8803bae2b516b56f2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACG1550645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523b597a7f77b22c97fd0606a3ade99a5e5707ea59450c2d7a7f097c18133317. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACW1622199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05b349cef2051b457f7a00301c640e539abb6820e8abc0f0985aca288f56bbb. Chain 2 (Bitcoin): anchored in block 957544 (2026-07-11T09:08:48Z), 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/TCACW1622203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10adaa4490c6600a9ce8d3d9bad175c9f26d565f823e643f7741a5ba3a187846. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAEJ1994811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2744036cb9308b62992347b2ddf8ec8359bb2f647bac1719a50c44569ea14104. 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/TCAEL1913465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04bcb6316829f9d0ede675e97bfc8529c28577d956f0a156713c43e9087c13b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCAFI2009648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0edf41b667ec9c19a3773245589d5bc9416ba17a037d412a5cc5e6a40ea7e0c. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/TCAFI2009669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d53688f7f41dc5037163d99c06284905f8bfd64594763d0787e71a4ab0a8d4c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAFI2009690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6289bea8db7e6d394f395ea7431fdb58a5b6d77f2d5a387ca1b1a89572e567d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ATX790112150.