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 0x8069bc8dec8a4960b33eb189273af2ac71028fe26bfff5a21cb2f0c2c136e0b8. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/709ae552-0390-4f7d-84bd-0289c6f6b3eb.json and https://artists.proofprofile.net/proofs/artist/709ae552-0390-4f7d-84bd-0289c6f6b3eb.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 0x6650a8792d3e9b136e4b77484c8772d328fd56cc1fddd35e3d67a1e2fc0ed7bd. 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/TWF111101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e5a13e2438491f634b0807d356e736e0707a1e71ef334d2ae200d89fa741a7. 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/TWF111101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42ef97030e88f520cfa0c7f015b995463664ece32d775d53fcaa8c0e19f1262. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TWF111101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3b0ddfab6f11eaf26db289dc78e30841fc7fefa8e555d6c3746dee8af5e98c. 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/TWF111101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32fd9ba0aa2432650fe440f09b59f5981014a65bb2870845e32869621e36b2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWF111101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b3b9b82aad34bfcf9875f4c9cc727e45e428e51c20df78d6eec206a9187998. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWF111101007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad89ec6ebc05ae7b8a6858ffea3534452a676f7e1030101f1521be2b0c72664. 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/THMOB2212078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3de7282b91a6d5a4a648e4332ea98a74004a70a1c698fda3f7146a6fb3ed766. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TWJ012101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4bd0ffe693ee3b3431f5fd2016d44a82c9b764fc06b28d91fa983eabd76fcf. 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/TWJ012000801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf5e151af471790e1db50b3ef25913352ae845c8592598c8cabd3504d85be4. 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/TWJ012000601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cbbecb9d390c3853b4b48c5cde124615798556325dfc87d9b466c26081812d. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/TWF111000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f69924c930a16e8b3defcb81c316dd2bba517378205d31f12c8f7e1eb4c45b. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/TWF111000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c08e82cba9724050b84897faf79eda7ac808fa8e78607a1d34ea6cf93c1241. 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/TWES12200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d09a1a54a433a2c3a8f101f9b702b77b80426d184be69884e0990ef130ea76. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/TWES12200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f41be87689f008118c610191c5559c9a9457089ef95e2864ce52b17d9a14bd. 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/TWES12200203.
21世紀厭世中年 21st Century Middle Age Misanthrope
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a69e6b26330d0d439a022680413dc55e5340370dc556f4a4190a90fa7f705. 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/TWES12200204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fe5d5e3323efe3444d36333b350d4027de3ca0651a41656517a9b77e25a984. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWES12200205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98446eaebcecc88298ad846d0e654df872220ee5c73ebb5768cd50255f591fa. 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/TWES12200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5490a7c1a4c2ce192116b3bfda699adacff89806907e5466b9d12d016cce2a81. 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/TWES12200207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3de3fc22773c74d88ec9960bfdee433712227c31590c2066a24b545b80570c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TWES12200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fdaf30a4b3586bc3e92bd087636684f230ebd8d6cebcc859bf520311f91b5a. 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/TWES12200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4164fbe2c62bc547a9220ff2919aa075f949b15eac0c06c84877476e7d331f80. 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/TWES12200210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe4876eabba8b19d24d2b09fc54b0dfc9b024cf484c0e8a5c3fcb107637e8ec. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWES12200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0347dda03d89acb336b0e0e2bf58febb924e8c19896121cda73ee86fe95dea88. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/TWES12200212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf034e01e1699b3a31ce0483395df2b6660ba22db5dae48fa6a77d9e9bc88f714. 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/TWES12400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ca686cb658b8d3aad59040656eb5d1c7b17611ae67d8a5d51bd2a6961a7288. 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/TWES12300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b3e8019a57f4e215da31203e89bf407a548a49d364dbae9aa60aee38da8b00. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TWES12200301.