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 0x0900c97f93a6cd24abf1de46e2b7c22551ce26e7d3390e90e3cad2df70f2201a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e02a812b-16cf-4fe0-a4be-2f713a4e78eb.json and https://artists.proofprofile.net/proofs/artist/e02a812b-16cf-4fe0-a4be-2f713a4e78eb.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 0x2386e999d6e8856de52a75a44e7ab11abeb05caa1c230e395cbd7815489aecc3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZFZ72423250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8c7dc5fb92fe24b2fec68d1cca2a1086709a9cb5822f42158d9ad3bc5790c. 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/QZNWV2452201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21d715f9c3a379d5c5de9a9ec1ae987f5fc1b6bf8c2929308783bc782089adb. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZHN92412547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fcad022fb36429ed1d50aeebc471dfe6240b83deee7452115259a0cd48af38. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QZNWS2401753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4306be06754b9d742df984f94e290f6cd7ab56fb05bec582872a3f0f535671. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6H2485426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9de546806fe32e3373b8d7d9c91fd0b6a6fd9c35e721f1013ae13d82af1d14b. 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/QZRP42421531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fcad022fb36429ed1d50aeebc471dfe6240b83deee7452115259a0cd48af38. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWS2401753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21d715f9c3a379d5c5de9a9ec1ae987f5fc1b6bf8c2929308783bc782089adb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN92412547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2386e999d6e8856de52a75a44e7ab11abeb05caa1c230e395cbd7815489aecc3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:04:29Z), 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/QZFZ72423250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386804e5646ee5873c4abdfe8c25027f6afeac372da155e0fe207f712447c8aa. 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/QZK6M2335846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d31dc41c9f0fa0b263a3636a815efca02b1f3eb1395d028610cd4ccb274ae3. 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/QZK6M2331738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da2715d3103aaf07a2779f2ade4a507eb8bd0fd5cd7b80b138c9734d1224577. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6M2337542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefdea4a31690027f3d228e2e6b6faac1740b3b8e37282c22d41773f82f34317. 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/QZK6M2337543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f69a35558708ce93222387b85f5dbc175d52dfe0dab2e61550449134dd7e13. 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/QZK6M2337544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5623e6eb63df6da014c2a8957ae8b57b3a2cce251a8e44321528798440253a5e. 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/QZTB92272594.