Sound eXchange (SoX) is a cross-platform audio editing software. It has a command-line interface, and is written in standard C. It is free software, licensed under GPL-2.0-or-later, with libsox licens
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 0x115724004003f7dcce1511a79c3fe0a430dcade0936af1901db47f16ed3bd4b2. 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/bf619ab1-280f-4413-a7fa-199e4420c84e.json and https://artists.proofprofile.net/proofs/artist/bf619ab1-280f-4413-a7fa-199e4420c84e.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 0xceb3cdb6cf5edee5924ba3e73165e4a02d3b20529bf64a295675112676e72de5. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBEU71400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a43924a2659f954fa74f2dfd8ac3986b056b95cb92dd77aa6b6e44e7e4fcd71. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBEU71400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607f6d8a3dc9f40903e5fc563b4c2f735200d37a3f200f0ea098695ec16fa2a3. 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/GBEU71400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ebb65c9c7acf5d92ed7eae8d278ef7bceb9eb12f4161aa557ec3479f0b5691. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBEU71400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b64363a29234d88df7171e789e7ed91afc9f456e93332a04f838cb83a7508db. 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/GBEU71400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213972f4d6a2e3a15b2d096a08d38d72e8d8b2a9a27976009869d362107a6e72. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/GBLFP1870704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db44aac99a9edd1262faca3986a1227589e52373ebc8e3bdd41cf563c0b7cd3. 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/GBLFP1871534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bac625e8207d7ba9710dbee59397affb739a418a735804afcf96a008d04c86. 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/ZZOPM2106503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae15a2553f2ab8d9689f7b6bfcdcf4410ee951b62506dd447edef127c243faa2. 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/GBMA21878176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145a33def767b35de3dc852a08f97edd2bdce14180f2b7ff7c1a281f32f1aa3b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBMA21951636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25f1914a1adfa6ea5c51ce171db334f1b1ebf48c825c5f9bc7ab8e109bb9252. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/US23A1593824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f6751b7807c88c8488837fe749b809cc08baef7b364579cacefb4e87322e23. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:26:40Z), 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/QZNB82519220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618e10a6db59067a93e9b7d3d5334a2d2ecc4c4ff83be0eab1cb9ef1ab28c05c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNB82519221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf48571a897b2d58aafdd730af0102e0dfd2cfb3614ed6814ac191cdf67288f4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBEU71700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b2af4dbd8b4c873be2338ad68719d1edc13b8867e9a7922f70b45a7c10edd0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2478969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106b3e709352cf03314cd8c61d4da0631f8e9e6f8fb337ada0d74bb8cc775b15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSXS1400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523f8174862ac7e744b3b840f70602e79cbdeb51fdbe86fc64d02a787d3c5e1b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBEU71400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38fdb6963518072b351fa0798bca15b3cafe3c5f271419cabe03f0bc4b61b64. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB6ZW1500658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cd075fc14d8db60ed05fc90d69d83c4e89ebfcf12e6b6629d9dea9cbbddf3c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBEU71500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c49464c9cf8ba9fff2c2a6f8f1a9ab45b3189a44352e1638ff4f7df12e3da6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBEU71500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3e665b1e06b079efcdc84bf8a56e4a87a03496725d204d378aa76cdc622d13. 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/GBLFP1829741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbf1ba2315c2cc890c60127a0bcaeeb7e950b34b6db889c7d509f2394d8ee70. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLFP1829748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f8308b4f22757c1202232d86031e2c6ee2e08a1288246aaed3727d185f5795. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBEU71204045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef50a848d4e173ebe6bfd21dcf701b4d4360953609f3602a113661b4ff3a165. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBEU71700005.
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 0x73acae0affa8571dc4f136c51e6985636f04293b2225837b71b78282b1a08b05. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBEU71700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2323e506367ed359117155ca867ab80598743cf8282ba14fe1f3927f5f9bdfa. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBEU71500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f467794ab91307885cd7af89eb253482cc182d4d616bc3353e366354768a736. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBEU71204043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91ae34d350aea7b4258fc7131483cee55e70f7a6b814df9b71733ecda78de04. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USL4R2012443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d172d2586c8138b683e4ffffa57fd5ad433f4bf89ea1e55adf117e14262149. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USL4R2012450.