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 0xf9c4bd65e9a2db122487fdef8acdf6958a50d9942d881e6e4a32fe185e72f9a3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b900df5-49f3-4224-8664-55265acde474.json and https://artists.proofprofile.net/proofs/artist/5b900df5-49f3-4224-8664-55265acde474.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 0x5e9c5a747dca933b7df384ab59adde157616d2d6d2a089c2a9f3724b702b5925. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:03Z), 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/QZPLS2019218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf724a1853014d85cb1c049240567a345c75c27b4d68e4dcf8ac65a8d56e7c0d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYW2166492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88d355a9464215ed866465b7c94313eda4da28d253ac29cfb48a14ab8ae62fe. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:20Z), 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/FR9W12418740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7764d06f44dfcc8a04851124c3d44631c0cd37ef0fae10bd7313a1ca4e5a15b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12423469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c9be7033e9cdb5ae7f8423474d3ca2b7fd544924f262e74b259263576fe404. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR9W12423470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09ddf56e45e1b0ea01526b81db1e0b3e164b998e97b08eca7d4a0064d8a69b8. 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/FR9W12403308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767eda3b0f97fbd0bbb5b06b08e822e2518e4039c20fc53694e46c2510d706f9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR9W12423466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2bd1ae607f8f64fc95d9f4858ddd80bd73bc460a1544a849bc5488830cb51d. 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/FR9W12424426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1203a2062dde90ea1610ca6c6fd632a964f16085b46575569cdac4a65cfe8fc5. 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/FR9W12423472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daa15ad2ae6ce5beec9bb58a37a265c432820f1f9a2742895ed1b148babd144. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR9W12423473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a3f7fbf24bcd2459d12bbce628f78b80c3d571f9a5ed6841ff2d6c81777a79. 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/FR16W2101950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b028a95342e76aaf3832b707e2bea1907a4d7fce26a0e7a3963a4148b7d137d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR16W2101940.