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 0xb09d67e93616f9f925328c7deba157d1a3648fe15eac54b3a391ae421498b2cb. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1918caef-5e6d-41ad-a46f-4b89764aa684.json and https://artists.proofprofile.net/proofs/artist/1918caef-5e6d-41ad-a46f-4b89764aa684.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 0x1df5465ad2809354e27ac3d9c6c0b7ca3ed0ae03ab7e234d2d5e27a8f3f33242. 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/QZES52468997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7297f51b442b245b731a50e44da9995ab04199a2fdc063e03169ed309a86fa69. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZES52468996.
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 0xa0daf76f0e0e78679c3a45787e33567fe7913b7ec597d907e76179210fb64b1e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZES52469001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b617740b46d7eab20c1066b90b247d66334be8841087b832406f86b58037e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:20Z), 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/QZES62430653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf283af62eb4d67b9593149d9a832f2035afc73676afb5e49cb6df00c7a2c154. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:43:02Z), 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/QZES62442059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f0bcc93ccb74aadc0261af7ea89f986f98c0d473c6727bd323005b991e1e37. 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/QZES72423404.
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 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 0x7150633f5cc66b5ecc3796d688bdaa71589c10a443c6398891704a0dea4fe41b. 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/QZES72423411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81147f7efd4acf80e0378e9016541d88bf70d8aa0995b7a0a8313a000c738f3. 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/QZES72423412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f50112f990f6b97f6f64b6e96e1a343372953713c923f1e8bafe27ed16e4c. 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/QZES72423413.
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 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 0x87c2e441f653d7e97ab1892e81a582b3a8a01ca23f5ff95b27551109e8d03fab. 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/QZES72423419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2f64b13c1aa2d9d27e5188e8104b7464204404cae0016f707ec644a265e408. 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/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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ef46d8bbb93073234f68b4255570dfa71d3a65b263b9e2a5dfb1f45d80e943. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:49Z), 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/QZES72423422.
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 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 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 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 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 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 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 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 0x92afbbe9532cf830e700647948540bb254efeb141b8b657a2be6375e7dc861f9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFG2474679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0927154a5661bf970b8fbd0e53c476b268f2ec9b350ff04d7e9e5ddc0b8373c8. 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/QZFZ62586039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72043c16bbb71816999761bd96f0f229cbda5a5ed63ba67885a70d3bf32bf873. 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/QZDA52520016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717ad6bff954bcc30451d7770674b06c9121ffd3907ca069730e3012ab4d67e7. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZZ772598963.