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 0x3640659201751f115d4d388e881b39c5297442e00ec13932c12f38df8f1054a5. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c0f0fa9-cd03-4735-a08b-3f817b3bfd4e.json and https://artists.proofprofile.net/proofs/artist/1c0f0fa9-cd03-4735-a08b-3f817b3bfd4e.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 0xc8113501543206ce9bd9d0016318fd359e3756fcb5bc32d51c7907bef8925843. 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/QZPLR2338884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b304b660013e39e1653fccf579d866d17b763b1f39c46764274c47bcba161a. 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/SE66N2330390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568cc80825dd26b8a5e5a8c21dd86b72b42e93217c7f30a9aaeaabe5f6d1eb46. 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/SE62M2346684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517dc50945283eb025d608f047f87f8f6a5ba05750cf34123abf6743a46d6390. 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/GXD7G2463327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01382de0a3373c0a0761257321c3aede4569785f5a5feccd606a26ecaa03b519. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE6QE2301852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c164f5329939d5751a0d1f433fc084fc57130cab603c554be22e7848806346. 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/SE66N2234187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4bf6c9e6f8096fe5005c27b6c9a46845d2f35383f15e0f70b85fd64181a257. 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/SE5BU2528098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af9a6f12718a1295160d8f2f1402bd7ad404f8a5cbb91f312f5191f7c677c6b. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZES72423401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7d2c75489261000ed8100a43bf3fd3fe1030dc9f8712263738d20ecdb02fb6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZES72423402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b0860918814ac1fe7fa0526e42b6e11660e62cfadf274ffa7592260e6f9d98. 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/QZES72423403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f0bcc93ccb74aadc0261af7ea89f986f98c0d473c6727bd323005b991e1e37. 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/QZES72423404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680280d660da40bce7a7b311b27dd25e0acbdb11368a4c8e5ec04a7c8e388105. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZES72423405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ab8c09dd05a9937c3fb3ab4171da113b7a6f3512ca6b0b3e30037f15966a9. 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/QZES72423406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ea913a58d4751e59f3c85413eb3fa0126a738b3fe2220c2076d87571cadc98. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZES72423407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f27f8dbe62b0a68ecc785ebbb03b53ac55c57836fb82247f4f15b77f5ce38. 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/QZES72423408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578cf6ece0464a033a71023ce5c0c993c3dd09db8868f112e69191b2813a6d36. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZES72423409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e45629afebc282648023b5b8b206487f0aa6a349e462f2c6371a2ecca4327a4. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZES72423410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7150633f5cc66b5ecc3796d688bdaa71589c10a443c6398891704a0dea4fe41b. 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/QZES72423411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81147f7efd4acf80e0378e9016541d88bf70d8aa0995b7a0a8313a000c738f3. 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/QZES72423412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f50112f990f6b97f6f64b6e96e1a343372953713c923f1e8bafe27ed16e4c. 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/QZES72423413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0fda0b6613bb8b86218452a10228d2fb1c42d4a444206b37a975727b3a1f96. 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/QZES72423414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcae5036035f873a18cdf552ae5bc10d61a09e8b1b17ba75f50b3f85be31bbc. 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/QZES72423415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd5cceb49be04cb8cf0a22d671085b8783c66e4607e7feb9097cb4869552836. 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/QZES72423416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168cc60d5ec1dd294705c71c16d65a8cf366a41280bb3f5224701c35342ac04b. 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/QZES72423417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0dd04ee6b729affd75f8f5acaf8606ce0f23e9a299b9d67f0dbc3c4296ef02. 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/QZES72423418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c2e441f653d7e97ab1892e81a582b3a8a01ca23f5ff95b27551109e8d03fab. 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/QZES72423419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2839fa20390968251d64fde6cf0eae1b1ecffb862995a67da5b774e06a370ac. 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/QZES72423420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b6175fdfbeab437458372007e1d6ea1bb02df9a2911a908877573828e5b58b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZES72423421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ef46d8bbb93073234f68b4255570dfa71d3a65b263b9e2a5dfb1f45d80e943. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZES72423422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2f64b13c1aa2d9d27e5188e8104b7464204404cae0016f707ec644a265e408. 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/QZES72423423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e500a266a023b9a0f8684c4f6b59b3ac0d4bb24a86b3c45467aeac9ff8e76a. 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/QZES72423424.