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 0x4bf98f39e3d5a62d0e495b14941ffe7428aec917389003b12893633f5ab0d793. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dee7b93d-4730-4eb6-923a-dd872532645c.json and https://artists.proofprofile.net/proofs/artist/dee7b93d-4730-4eb6-923a-dd872532645c.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 0xd17028762e7ef4e064683c7cbf6eacd5fcd6abe9fe48b8f54681b551ed1c6434. 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/NLCK41058648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8210a7df8ba4fc75051704c3b433cc070fd7aab49ee93e1695aa16fdaa616. 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/NLCK41058649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fa44ea8938cfa6f90f70254c266f4677cc117b8da8768ef92f9dbd1b0df7b4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLCK41058650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6123c0018455ae1830f789b3c50ab640c0f591834ef0e426f93bb47a8a40c34. 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/NLCK41058653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17481adb4fab448d16f6f3eca44cf31705b001dc7b09842fe7da41107179524. 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/NLCK41058654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2faf870eb7b82b23fe1b2e964e875d3a0105fae0135a84246cfc177087f2047a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLCK41058651.
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 0x33e9f032602040ff4a6cec420109d75038f280f3cdc2bc1743295cca3ee77dda. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLCK41058652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd773685cb9a1fbf4db4c2c470cabecfcaed21f4143c5e913b71d4900eae6d734. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLCK41058655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de2bf102775e6cd740db07af810e4f1cd95224d9719b1a9cf46568eb1d07f7d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLCK41058656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdb040f92a1a2d07f2bfad3667a93a43c391d814933bf4a89c7ef27e7b7b87d. 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/NLCK42407214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc9f298d476e9839bb17fc10d3a7d159c4644444a782d8d800e3af402c709d5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/NLCK42407213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b0f32302cc6b0341dae8981a548d843f60726b85ce979c611a00b2cf955aa. 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/NLRD52355137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e9799294ae59ec0a95e3e3eb52c9bc4780be859702f96ac771bc48736d307a. 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/NLCK42219073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc326233bb35692de06fdd5cb65ce32cb4860dffb817d7e588f96bfddf2ae0d. 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/NLCK42219074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9884f39e1d8f9bbf7cd6195b41850966db1dbd9b8f7ef034fa11e4c3d3f4092d. 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/NLCK42215465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ddb6b8db422d5a273b43e117404de2891dcc0f24619bc08593ec7b11fa0efd. 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/GBKQU2241565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33640df81de4ebeac32b2860bc9580bb2390814c67e26962417aaf2721972683. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2241568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7816127c0e66d5d682ff10d9915ca57664189d6457119eea40f1e61dcbab0d71. 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/GBKQU2241566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4ea75f2570bcaeccc5b73ccc4d4bdb22521ec989b2c72a64b13ad1ae58494c. 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/NLCK41094931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb0a22f933b4b0988de4837f2b8f751cfac2d3eeb12eceeface9cffe6de00f9. 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/NLCK41094934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f5b4de48c2284bcfaaf64bb5a4d8435fab339c717138fe6280198929b084d5. 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/NLCK41094935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bcd1ae97a9d65bc711185b9be8ed06a924d2300ba3404518a0f689b096a355. 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/NLCK41094932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1189f5961268bdf1d792bcb98236dadae9e1e20c2c938b45076c8f7f3deda3. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/NLCK41094933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8e1d7b37dbc08a1b4ac28c8059e455b44d4228d77300b2492265eb3e79a287. 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/UKLQ21900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bac550e5d7854ac058a3e20df31e30958fbf63243329973890c1b5355b1010. 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/UKLQ21900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5470457cc6b5ffee527c42266bc439abadaecdbf4b54853d2e21ef1f180fd9f9. 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/NLCK41045084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c0d67e5f43387944645f7d3e16fc9ab8ac1743c499c9c98d57c4b4e5e5453e. 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/NLCK41045085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb533ab1b7d811de6c0f40ae8658a968ecf2a01cc4319e42dc4d37d3ad5500ad3. 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/NLCK41047398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cc6f58b8a9eed2a9db5231f351999e8c34f8a39e3db206caf0fcf4acb78488. 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/NLCK41047400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1503fad715df734da773258654f4273f9b320b5040aaa60031882a6a07b7d3ce. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/NLCK41047399.