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 0x14095642e836201121cb5731f9b28a30f4b9666c9db7d1161493a87e0ab8e0b2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/223ec42f-a716-4045-9049-78692018e465.json and https://artists.proofprofile.net/proofs/artist/223ec42f-a716-4045-9049-78692018e465.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 0x98a76ef5d62ece70b1170743ed4ec55c798df57ee3b94aedf9315af78e9d2656. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBKQU2221974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f971f51036e129a178101e7cec810fdf4108f18e300f49378691aa6a1c19c83. 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/GBKQU2248281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c40a9e4366c86f257bf5766d9d722fb3d9e9d2db7eb777788545c39e4d7937a. 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/ZAH962400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389745b10c1ec5982e8fa4c5e786d121f3c7f902c06e41c2a958890d8c7b807d. 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/ZAUM72501588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389745b10c1ec5982e8fa4c5e786d121f3c7f902c06e41c2a958890d8c7b807d. 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/ZAUM72501588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c0d87e58719fd0641f449d163a5c482075a36d462d8e430ed7daddd2df2475. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:55:10Z), 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/ZAUM72501589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716c50457df4c517c9b3e14090b9925d7bc00b2058a5b99e5c689cac8a345ef9. 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/ZAUM72501592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c67b7789450d2ef6a497a7cea463327bcc95b97ed200e7c3722ad9b0244e595. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ZAUM72501593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5806c82f3a9da96e9eb9d94a630ffef765b15a697194405b9ac17c2ba796895c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:42:42Z), 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/ZAUM72501594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0594705aa50d1b5fb13c112f50e1a279b1d955ec57a04d9b2dbe3cd43f18c31f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ZAUM72501595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b06001f69098478e026a025d53852126569fd791758420c38011814ea27a767. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ZAUM72500690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ca28ca89b4f9188e53cf5f67d4ba55fdbbc7513a176271c62b06bf37d37b77. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA56E2419524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb915ac3ea28e293d47653c191b244d44126ad3946262e5f5db8c1ab685cecd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZA56E2419715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b7f1d9c8e9f325a8b8c770a58191897a6988f9f7db9a89445f3317ac25b915. 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/ZA7VV2410016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff3b3922e1f1dc38a73d5a07eb53db84cadd03d229532f49ba647ad5a34b4b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZB4M02500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1995ed0824b100e4f5915d38adcd38718e450b17ae392278c485ad33a47be876. 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/ZB4M02500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb915ac3ea28e293d47653c191b244d44126ad3946262e5f5db8c1ab685cecd. 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/ZA56E2419715.