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 0x85cbb0355e3f9a26fd9384742208101ff40fd35c3fc0bb51b4fbb8aa6c46e287. 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/a53c7582-d8c6-4368-9ff7-02080c7dbd95.json and https://artists.proofprofile.net/proofs/artist/a53c7582-d8c6-4368-9ff7-02080c7dbd95.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 0xc4ed9bf2be5e767490754fc35e2f1ebc70e4d14582222ac6908485a9c9e345c6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZ85M1987791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291d14bb4096cb94e36d3f3b03396c1a22ecb08d0c5cc6265606fe6124737fea. 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/QZ85M1987795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b477c3faff4caa15f7e08944e8f3d54c336b768ddac325bdb3449b455af312. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZJG51921878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8148419c7335c335695c9c7d0bfa2e9ccd30ad12fdf901ca1e5a0e153d5b881. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZJG51921879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4857a6975c690c043ce5cfa5b51be73c6f0a3342cfdb7fa55a40a791b9a310b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZJG51921881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1d5723d61d41093866fbc38e58f7a229b75925b84eca62ab900c801938fc8d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USLD91727027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3513de3d437b30d4d79ed9f8737aca1d667a2eac80cf08805ab25911b8a8408b. 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/USLD91727030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94091a44280617984e82430e11e9555e2f668e8a1ac445e225df5847fa71ef7. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZK6M1918336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebf1ed4857564b9025a7f5ad4619c827ae64ff4be41dfbdf305cd295073298a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USLD91727031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74fe0d391770431ed7e3dc3b1bde88f4c82517a986d1438d5bbc5269ef2bdf4. 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/USLD91727032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1b36fab8080b081aa5e2fb46a125309b4fd361e5d14e322aa9d98bf8b429a3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USUYG1353904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7080a17b5f5ab010577fc48be436f45c25da3ebc74a812126232ed10ad239e5. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USUYG1389046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8943016acdf1abeacbdc03399b43789bca89af201fe3fa31aea7f1777e7c73d4. 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/USUYG1412937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf335813daa772cf58cd57997940678c76f48451f154192aedf6e89d9ff9f5c02. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USUYG1412938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6757f9f77b7fa2f388b1fc9a0acf46ae7de97409a85dec753625743fc6d3e61. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/USUYG1412941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0cb0b7fad1ecc809ae257a0c50a18d5cbcbcd91cb15b0846459a27c19cd786. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USUYG1412943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908c4475887e34d71f6aaecd4834848cb7ca08817f2d8f41ccd527fc77467dbc. 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/USUYG1412949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d7178aa80441802589c438a91ba83c82d7b9e6d059e3c6a0659fb3b4849586. 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/USLD91744819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade24298020cea56e0ba63e7341b13d0c415e2eeac415a6c50f597f02d730045. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/USLD91751431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09485ade12cdcec3931be4054f737cc9b1558df376095737ce3d863f5442ab7. 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/USLD91751432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf840e930db63ab752a0d22e81047e24a6053abb1a910957b1a40090b296e3eb. 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/USLD91758410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5080771127a753818dddd203945b2613086713a06b800484929243f382f5ecd1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USLD91760699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58470b20d6795b74a9dc625cf1e756d109c64bcb780230da647ae4743c200ebf. 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/USLD91768589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17f328e336f3ee66a0240dd35fde1e6f975b577332e16a5815ec1987e912e54. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USLD91775865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1644d920b536401746bff5b3e68f2b4465a3f4e071b5e7457467bbe4db3ef575. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USLD91778195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f5f0f87d9726767c65a007ee02875e460e345dbe2cea64136a8ac4455b50ae. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USLD91778196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a28db836131c367300c9c64b5fbe644e404156bbbc8ef8ae6512502473ef837. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USLD91778197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3185b1bf4256b948765726cd827940c686bcfdd4a3f222489c02822142a7e5f0. 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/USLD91778198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf58f5fd3edc924677705386645b393d98df4d3d31326aa5088ae9ca72eb3243. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USLD91778199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87ce5423c064e30cc9c425f7623922c90853ab97ff54ed2bfe0c215af23025. 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/USLD91778200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066660c0c41edb1aa6c321a20f8816f0414e33d77afecd2503d792a22a2e46b6. 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/USLD91778201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1db49bed0c412ed2ed0b762dd657c50ee645527a770e36e09676fb372c4c88. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USLD91778202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfff1e152d0524b0fd0d14acf9274af042d612f0fa95fd205793622e5e8b7cce. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USLD91782684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149fff07963aaef63e2c51722ea9e5424248141bac5f54606ebf741ab559071c. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USLD91782685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb765c6e57317e3e1afea24663845ac75b26a38f2a13fdcee83f9287ced95a6d3. 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/USLD91782686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abfbf8e42f9661417de9ed851a7e22eedce963d490ceca3a32175cfd44306fa. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USLD91782687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771c6dd8b7b891c7672d8be2fa28c5392bf3c152f38d279ba7979d600bd871f0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USLD91782688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef4c51d8ed01b4218ff984b3bbebec26be7f081ca6700e4a0a275059b6ceb98. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USLD91782689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5b8cf5150a2c26ce10b6e9006883fa964e55ee99e5df9b8fea57f173225dfd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLD91782690.