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 0x5109c9933fb1c70fb4b8d735b711148279503ca4fb57eefd0f01466aafb743dc. 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/365a0694-ea62-465e-a2e6-cb680c6ab9e9.json and https://artists.proofprofile.net/proofs/artist/365a0694-ea62-465e-a2e6-cb680c6ab9e9.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 0x1786b1c197eb1e89893412c6bbb19285a8fa8a21be8ff902a3e7515d3ad396d4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL5UZ2503496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f4d58945fe5ae6db18d808a199757927ea93c8f6ca3db1b0e17b7747f386ee. 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/NL5UZ2505340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7552d6115968f4aa313509a6355687652b92cf9c3ee908a06c4b47403658be59. 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/NL5UZ2505341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccbe72a270bf89dc0b016b6446db5029b8da2c4adfb5959cd1a610ff546470d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/NL5UZ2505342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7445981854f46322d3b8469b67d8b42f91c9c017ba49bcd7ff7db36bd93581. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/NL5UZ2505343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bfc3d320a3e0d9b26551a304bd667e5655d0438021b63fa0c4deac2fb93f9a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/NL5UZ2505344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66948b7fe79370c30c4189a87761caa1e9973eb66b4aa0c64b217ee7b6b9cdcc. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/NL5UZ2505345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e31fab08a2e530fbf83a62b22a8d50469d61536e759f1fb80e06ba4f45b253. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:15:35Z), 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/NL5UZ2505346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cfa8ef65722f5cd288068c9c5a7b93e8e9df74c533347d6f9bcdd7811c15be. 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/NL5UZ2506076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eee363f9097bf72a2cb932cf31953e6acd3b07575eb4bd1b03d8c5d107d5806. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:22:14Z), 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/NL5UZ2506755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef72f79612c27e190235526958bf5c823647e65f6f482b3ffba4a4fd3c70279. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NL5UZ2506756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176442321f2482c980330e55bacf7db59b72e5854b4c2dd80db665df7f5abd36. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NL5UZ2506757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a9ccfa1a07a0f3a371368cede6c88c915dafe3effc8d77888991d7c30621c8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NL5UZ2506758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ede30291e99d3f04ed055bda8a94eb60d98b481fa425cf9bf9b329d4083588. 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/NL5UZ2506759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6148e3f583bd4bc5be10f8b2355bd36bfa11c827917490fc04b7b5129102f55e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:56Z), 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/NL5UZ2506760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf17102383746e8d15c33b5fcc0a0173594dd5e84b932c30b56ee033fc3aa7a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:31:46Z), 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/NL5UZ2506761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae823f2dd3e86473f761c830bac0865ea06f8e770539ff4b9d3d9afac7e61284. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NL5UZ2506762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bc6347e910ada585fa1880d5b58bb0570d2b8388edc6b59d14e3ece74db7c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5UZ2502335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfc0f066e622b50eb0937bbae8f9d41c128ede38a47e7fcb0d6cd76a1b1b92c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5UZ2502336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abb252a5eb536395424f463e021f187df620c7fa572a3bd83e326ab560e3c8e. 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/NL5UZ2502337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37112cc0117631d76220b55bc26b36e40bbb1cf594908b8d4ce08b96a0c678c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL5UZ2502338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29565258fb17f7988a3ea23ec9354b144e6828b3ecc27e9b26294210e391856b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL5UZ2502339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a8fc3fc3268d4beb5429565c8267451d05d5e088348859e068e2f7a17b9140. 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/NL5UZ2502340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3183c4e10e97b482bbb34aef23ef96c7c90f1e59c37e59a97fc2a38874dbf645. 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/NL5UZ2502341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28834c846c9d50c70e2fb5e490c048b65e6abf5855e14f5aa9b287e202832ddf. 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/NL5UZ2502342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0200204e041bac1dae3beeb336e0d71e394ccf8d47988e46e8551a3f2cdbd769. 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/NL5UZ2502343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c6282379ca5e72ccaa20ec4f7291f4e5192611c26cd5d7970f89be1e0f6709. 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/NL5UZ2502344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbdd7ce547062a22be80dbc21c715e3edcd316ab76bdf03db43b3d6de5ff74d. 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/NL5UZ2502345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e9eabe23f4bc30e889bef40db0371976f4f033b1531e5b9c3c46fa4c2b461. 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/NL5UZ2502346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05deec9b5f86a520f43b7228b3831eab1fc0f0151692a52ff61aa59a970971f9. 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/NL5UZ2502347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d18f7fe299572f7ec678f4c95fca171eb1bb8cd127a90881b2f552c955bf936. 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/NL5UZ2502348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c717628ec4b09db824956d46ca63a8e295e7fab24421509a75d1c927a10d138. 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/NL5UZ2502349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b1e90ddcbd271e6ba7ec3b69a3bae02dac526f9e49ff093294d562d8ddd25e. 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/NL5UZ2502350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7bda83155b3270adc6941720c985f3d2ed86b5174750e0b69fc16ffca4cc27. 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/NL5UZ2502351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5174576523e0b94da6c40b7e20e7c5e78b889d1063bcf60323ccee96d28961f6. 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/NL5UZ2502352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8c4d23e546facc83b69958df6a5792752364191fa8f8ffb0fbb261aad5e330. 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/NL5UZ2502353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3800984d29f2aa89aee2979e131f1bf82f8a3c1594d5c4a7b12406f7f03f2370. 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/NL5UZ2502354.