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 0xce07f811566216ba9e2e500deaa80fbd97dc77d2a6f5fad4723ff7d2c9315c85. 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/5fb82f91-b77d-4bd6-94e4-28c405af54f2.json and https://artists.proofprofile.net/proofs/artist/5fb82f91-b77d-4bd6-94e4-28c405af54f2.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 0xce8bfeb5a1e041884522cae3b3a854b5fb4fa5977162bc525244987346a16d14. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/SE5Q52202838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2f6c948225627c6af40448abbff4d47a7a8fd03b2eabe978d2205d5159fe24. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5Q52204206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a9bd85bddeef2fe8814925a2b37290ecfc174e3119bcf7e5afa2aeb1b753b7. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5Q52301232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da5431cbf78b06e2968a8f898dd6844f498c6999b424876ea570c06230f3330. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/SE5Q52300887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9872ea897cc0bb2a3fa2005f4deeef5093982464ffbe4d4118b3b7aab539c422. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/SE5Q52300529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea5c955d8b32d8093912b45e6e1e88999e4c95374fb77129e3399d4cdaaf57e. 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/SE5Q52300522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756255f9f04cf6aef36ec1204dba560da186294cf7fc42915e10acd3deb094ab. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/SE5Q52301590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee1669039c2c3e928189e865d353ebead4c8bc6f07df4d2e8565f400a8c1dda. 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/SE5Q52302783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07be16e0f55f9095230310e98414c1a253d3a3434101fa99ce0b260e8cc6ca7. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SE5Q52303108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5db459d36ae1770d8c59ad501506c96b6226b47941fd10e70e787f2a47579a7. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SE5Q52304787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60099b65e075ec67ae9ba9045efb6be6ed46b78b30f91c48f69c19b44b197fc4. 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/SE5Q52304393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0e9758fc1abd617f6af95da8b28cf2ed2607f442f72b8d8a99397d6ef8c15. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SE5Q52400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaa4a51744a832890de1065d13e3e7838b279e067a7c12b10435077411ca4b2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5Q52400584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baddf0bbf68ab57b2b511b06883553b96b09f1952058a61c3182e1a9588fb15. 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/SE5Q52400557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8048788b6b27165af8f4fc2d0ede4f4f81c23433345fd013f1fb525b220c40a. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:47:24Z), 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/SE5Q52401031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67daf0d6709cbeeb3992202ba0b0adced2c5dc6fbbaaf93955f8c7e57a8094e. 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/SE5Q52304615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3be6f45c53cf7235fcb981f6081f8692a987d0009b2c368ce5783f4b57e187. 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/SE5Q52401840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fa5bcf244cefcdbd8dbf7099d25c37fe0532367da20c723caf1c51edca3acf. 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/SE5Q52402246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf684d7165b83b8887934f3b797711df3ae236e5f8d35f7409da05938dabe1214. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/SE5Q52401168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600f1bf98a4a1052c055eed57f17e9a279f4710c38d8b771c90c281c454ddef2. 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/SE5Q52402435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b2a7de4ef7ee0bd5ffa9add0e42a0aee453631d8f46afa12702a7909537dc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE5Q52402616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e019cdd27116830d360e37820ea41462d78246da324050236445269560bcb9. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/SE5Q52404117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5119dd6bd0d9377c681edbce3d518259c70ecdf35f99ef211b7d87809ad5eda. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/SE5Q52403271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0272424c8556413d7438ea5c362b8c2048d17e04c9fe7eedae27f51b0904699c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:32Z), 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/SE5Q52403127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43984020773ce80d9bdc95f46b62461f086fb39e25a71202869896a234d47d42. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5Q52402808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa1c5fcd7ceed04aca26188166187c3a9c6e599483def475068356c0010bd65. 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/SE5Q52402801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881f6758a0041e09fa9ef0dda7c50ee90dfdf97c5062f2c8373b80e66104055e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:38:40Z), 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/SE5Q52402802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c17b0fae41b74c789e71a85bde99df13d5e658787ce733341bcdf721a0ae54f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/SE5Q52500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b76f9dd934558a3f4a70537d78f126442322e9c06e8156bc962dc086aba31e6. 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/SE5Q52500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d1774005d2c084963feca2e509acf392d4f31edcff05a090b04768e5892da5. 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/SE5Q52500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e5c1863add405595d403dbdd70d88dc20490748e98f02892e778fe5059ffa. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:36:16Z), 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/SE5Q52500712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb385f7701aea3611bd8754d4aa233b8758a40d57aa502d8ff812d05e178f87. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE5Q52500866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc42278e2906c763eb4a7758f8b34686e35aa1caed484bf4ea38927ba7824ad. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SE5Q52500982.