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 0x8eba97057d2fbf5abeac2ec1efcfa6f6799d0577e30f1a40ee680d3cb404fa0f. Chain 2 (Bitcoin): anchored in block 953978 (2026-06-16T17:11:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c26ffa4-4266-43bd-b69e-39f97989c8e6.json and https://artists.proofprofile.net/proofs/artist/2c26ffa4-4266-43bd-b69e-39f97989c8e6.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 0xd2d6410bf3284b54ce3ffe53601e77eac0b1e4a79a4d7a8c32eea9e378520d7f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSMU6999503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a5ede4de893cb934fcc4a9404d90f519b5435e585f0985dca55c01a6c58f7d. 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/GBSMU6999508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b517d100b2630db55f326bfd9b6cd689a3cbd36c2b53d9a6cbce5b621a4be4. 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/GBSMU6999511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ba6450c2146d664cc559309697c58baa16d8927be4161bba4a01891b747d64. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBSMU6999515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b38b2bfc17a2db89c20bce0fcca3b6ac1e8d67c3f9f9882b72a0bbd545f792c. 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/GBSMU6999519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f31dcc0230eaf064c9e3ab7cdacc9dc6028ca7c6cef79525221b5e0a261a69. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBSMU6999524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0935b194adb9052b044ee3a6e322354d0ace56ad0603ad799e9b61f226749cde. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBSMU6999530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14498c656c763650e3b09dadfd25e92631aefbec55631a233b943e4ab2abf7ad. 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/GBSMU6999536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353b49060d91f2a3c4537fc439cdee0cd247771ddd81b20492c0492728e74644. 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/GBSMU6999542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ab6984fa7d9365fc047ca544900fe8689dad5ba2a442febcd5106934b2e30. 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/GBSMU6999548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68203032bd8413302e0d35dbaaf9cf561d0bfdea890b00401d418468b50ed99. 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/GBSMU6999554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072602b565bd2c8ca478977a88dd93fd8bcb7a06b47a859cfcf5c875af3dcb14. 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/GBSMU6999558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ac4d44f9e00df7c4b804e4742a1870a90027b5af21d23f4f5b9ffc280ac6a7. 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/GX5MY2271388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5cd3621599b57dd907ae5e45a00b632748624d7b45c621145646620c9290a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GX3HH2159153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88a7acd5037a640afefdecf8fa458e1acbef40542135f1768fec94e3fdcc8b0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GX38U2334772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac5203a594aa7fcaf70a433252c1710ca3594858dc1a64d3e3a79cb21497f5. 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/GX38U2461625.