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 0x749b34c43946db6dd8cf3a8132d102628a0fe52848b3337fa2caab2b96be1bb9. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c483b9a4-fc51-464b-8469-a7ae4595eedf.json and https://artists.proofprofile.net/proofs/artist/c483b9a4-fc51-464b-8469-a7ae4595eedf.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 0x744d0cb0af64742f0c7679b61f69af82251dde3b2059568a5370c6915977cbf8. 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/USQY51790933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df5267c38f53e491d82d0cbbf37961ef876ae779f76d4a545a64d57efcbcaee. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/USA3U1814801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4219d44ae2407fd28e002ab0e7e195b292ac5a3896ac8e0f935c91fe50792a. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/USA3U1814805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f4464d66f36cb1410745856cb5da8196de6c123b6989c195f3854d1332e1d3. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:00:30Z), 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/USA3U1814803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8c2be9817830255be916ca850269a30b548fc8027621d61e4e80cd0fbfcc30. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USA3U1814806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf24336fe018be2992341c86496a99db2479da4e291372bfce9017123677c250. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USA2Z2200692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7818e18ac1d163b7f020a7d81bbdd33932ff412a897dcf2a7b46c4022a99fddc. 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/USA2Z2200693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6588291944066b0cbb0af81c40ca37e59b7626fbe3617d34af5713c1c19a92bc. 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/USA2Z2200694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c68c1b9ab7d551d0795c3450f85437a97f45de0747154cd830cbe19e8a3c45. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:53:07Z), 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/USA2Z2200696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04c4830a94f6fc16fda41af38a67b6cc31a730ab7f824d8ea49a494910ef756. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USA2Z2200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6531909acc715982780348c9a3f1ae5c38faaaea6c8f004668f065c56fa1d39. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USYBL2301755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dfa8d6c4614aafbadc499381e4dbfc0686515eb750939e4de6942e89a22370. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:31:27Z), 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/USYBL2301756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf636602cabfac3879030c240a0c151545b5741186e1611f77211be0311833493. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USYBL2510089.