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 0xc3d06d0d3aa796463ab79a174fdd822a9dce1ac43df740901b84eb0814e19843. 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/0bf19863-2370-4e3f-a81d-6223df52eb2f.json and https://artists.proofprofile.net/proofs/artist/0bf19863-2370-4e3f-a81d-6223df52eb2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Collection of Memoirs, on the Path to Recovery
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 0xc86a6514632da14e81eb81f4646f1840e400eefba07e494440b34ca29dcfca74. 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/QZK6K2085282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe618f82faee77d9d1b7eea1ae1bf9a9e485ae9d9327682c602bd550c36973895. 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/QZK6K2085283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896232231544cbf0fd90d45627a96bd8938cabb10053b16066925f8def53548c. 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/QZK6K2085284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5451d0f20a6b06a27777316ee6c04e556a5c2d079a44e14c7d304056c4b7aa. 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/QZK6K2085285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05901302664efcb1207728d18a972bb937d129f8fc3741c260819a7fd8d2b122. 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/QZK6K2085286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2eccacb6055d7b5bf6ad7efc2be256dd461b3b789bddd4197e19c2f3f5bc392. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6K2085287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ca7fd235cf08047cf4cde7d9c994c914315c189119f341776f26d499392978. 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/QZK6K2085288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6a07ac1d8ce89ae2cd1364e6ba9017b7efab41569b95dd3f8872079eb246bf. 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/QZK6K2085289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ff6a7f5236f1a3606561bc26ad3a28b8b853c60c12755bb4d22c5ba8e77c7a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZMEP2025951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0022b192a28609eff082c56a9b9671b5224e0a9a9d1382177c9f0b65d635cf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWU2056024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fadc4b187c7b4e8900bd76f58ec6b2fcdb9963e6ec13f3eb2eac6594d18d4a0. 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/QZES62140552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed34f1935dc72363de2b1d3cdba30fde18205b60183b4c454f7619c58f7bc63. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHNB2113622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e0785ede80960ab6d5d64bc14a690f2ecad8c39df7d9dd04710187836b6283. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6Q2158716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ce0df4d7eb724060a2bbda813516cbbd24c716dd34f12f2187c864e61e3e73. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZK6Q2158717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c976ddc5894bfbdb965468d67e572ba47fe519a52b8cbae8507789f4b14fb9. 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/QZMEQ2160044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc5ada515ae3d5db84aae11c8b92ffc27a4d45e1d0cda40ef834f18dd6baab1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZMEQ2160045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8342b45703d502697e2c283d95aed9a028b936d9e37a09fc95ce6adf950d9b36. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEQ2160046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640eb9f30f904ef40c538fe7633833863cef03260c4ec436e19ee866cbd8333d. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QZMEQ2160047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a6363db7ea668730c4b5ff13d2461d1f31d103a467a6d892d9afa2120db28b. 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/QZMEQ2160048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570c96e01db50df45466a51067aacee88e0373000c08b89d147eba239763f7f4. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZMEQ2160049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf852f7cbf82dd3a74d882b702a6acc2ed30daaa2ae85482d8e4ddc84535ac991. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZMEQ2160050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478d36ab23199b38311ee834a8c085139c5f13dd2c206e869a2977f84f198508. 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/QZMEQ2160051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df585804170fc51634186835ae29546e86a17a2a671acde65bb098301e08332. 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/QZMEQ2160052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d9ef0c799c2a6bfcd9b8f8db22277943c3f42762f6696a7f0a0bc85fc934bc. 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/QZMEQ2160053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b42463890e5456ee6100cd06132877d69ea510005f80e023f3f778f238d1f3e. 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/QZMEQ2160054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373700cd64a4c73d86406e266784edf20385bc71e0a31bc67ea73a49b68afa0f. 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/QZMEQ2160055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da414b3f3a8e42792423a91153667213e3c6877f4b0229f7cef41b75bc16f82. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZMEQ2160056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe117f573747a317f0386e6dcbedc88f8aa799f5797cc83b8b894dc5b008ced31. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZMEQ2160057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da926c65d2d76bf3c01d810a0b150e6c369a8570a4e70dac95a86b2275649f5. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZK6F2261863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb05bf40ef2bcf5a33780513ccf6e207f77aec6d336444b9c091eb53fba2d37. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZK6F2261864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e1e001b39f44e00286703fd4f5e570a1e543f33bdfa46c0421b7d8815cfd3c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZDA42333258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436fb8c4b9e32044725aa277ceab57ad18338f6f6c56e3fe15c9f38d5af6f86d. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZES72489919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2ca8f14f3338b12ca6888ccd5fb94c3e02616edee796bc45803de70b880a59. 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/QZES72489921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c668cad2342306754bf8ad44693ead5b8fe9d51488be71c2220433421b0e50. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZES72489922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c75f586e6f2909ae225d633b51b8f81baf5f21dbee9ed09ed747796c696ba8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZES72489923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46237c03ed4089d0c12fdd03a33123371fc6dee7a26b045a11765d428a776a89. 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/QZTAT2416573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdac656ad2016576a776abab8404fe867fa7b21e10bdfdf344138f5a751fbad. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZTAT2416574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02cf4967e4686b3164ffcf187bebdada56aaf39c01c4ae9197c7f1bd680406f. 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/QZTAT2416577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e6b6a08ea20a6bb37ae9cb53aadd41de812816d45408f04ae670b8d9ed801a. 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/QZTAT2416578.