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 0x472612551f4b518b748848b71e90880040b61f92dff5c1fc4247813a7aa6a0e0. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ba0daab-f560-41b4-8054-9e6ee04c171f.json and https://artists.proofprofile.net/proofs/artist/2ba0daab-f560-41b4-8054-9e6ee04c171f.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 0x7d58d5f12839c49916f1a3442c00b477cefe8cd47fe5179408c17eae5f0ad0f5. 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/GBKQU2458742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa772c2cd9bc2ed0946a88eace14387e695a20ea3d2bbdf48ce2b07877b3b6a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZHN72466946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d551c433eaa9bcb3b224ec980c93fb5cd5379bc88dc9edd0853a8f8b4d0661. 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/GBKQU2403382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458787634ce2d5dfcf94fc06e2d98f9714403712c4e69c6f18362100503ddca1. 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/GBKQU2403383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae008146678db48b8bc94ec5408e5d9402ff83cb0a86163c743e376827bc9574. 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/QZZ8A2366912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e5eec1cb32b696ecf2d9d8d22213699eac328c1e79844055d5a35fbb8686a6. 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/QZZ8A2366919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5298b8ffd82733a89660083f84367ead297a6b7afad53ae40920d340c00421. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBKQU2346211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b08f3bd987648ec29070a24d97286b2ab263b53419f7d11c46d16be7982e2cf. 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/GBLV62204486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef61a7c02b35bb5c336ab97c9911d859484147c73e8a29f48a6e495a030cb2b0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2213073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae83480f10e25338f055da9c87c8684b0db371e0319b3d81450e0cb24dc6715. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CA5KR2360764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8246f04198cc5c1d9f4a9596a6857f2eb246ab348472bebc8cfd82138fbc7e. 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/CA5KR2360765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca16f35838a3c5052ca79a8981f84a5e077fb2a5656a855abb87f46ebe12a92. 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/CA5KR2360766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81cc4e6e04c13ccf47cbb5803f91615702dddcc83dba0db45a47f594b45f04b. 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/GBRKQ2334491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d860b5671a5fc30d2b29305f55dc0aba2ef620400a201818d713aeb1cdde085. 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/QZFYZ2372933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe682880010b079fa3b392a643d09d6635c7b4a53d9332477b9bfea3a6c5f2141. 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/QZFYZ2372934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ce895afcaed09b9d61a291db2e3c91e0a64d0a8a0d7daffcb8c0fc49b6701b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZFYZ2372935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511287b164b082eb42a61de43ebe4b98d816d46db8b53e58fb3013e698cd8f00. 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/GBKQU2288126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2885ce93bb0064f43d1a874538f63ddaf4d9bd2e9329215d8e69c36c98c27ce5. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU2288127.
Backwards Thinking - D I N & iOAN (LV) Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a6cd63e7b61c3aa9e9b9745be02bef4f78cc332293b145d20b3a8cc84d870c. 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/GBKQU2288128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deb78ffc36febc3877961a738bc9779bf225ffddefe4ec48b06476a032a7827. 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/GBKQU2288129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156e2cc90bc252e764cbb8c378f3c5890e99e8afd5fa6752b8c3f3a80c67242d. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZPLR2226210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107866811fb62d8facfb35db31c6f9a4e536f661d27befce2c303aa632efef0e. 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/QZPLR2226211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223f01048ecd286435a54940ab50c2616b928239c0f10ea240086687a933333. 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/QZMEN2179157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0e6505ba0a4660d581a56756a76d9501f0a44ad423f37fdd46fd3d2c99066a. 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/QZMEN2179158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b886ed1af891c92dd04cba6f0b8a6279bb7915388320b4b4177cb8c93c13676. 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/QZNWV2078998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf38eee1af4e462b7c87e9819584a36b7b914d0309f5df99953f3644326723a. 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/QZES82036449.