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 0x1c6317b1ca1b82672bd91125df490e5f7fbbedcd2719dd984cde9902e0a698b2. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f038cb1-6b17-41a9-b412-72332e46827c.json and https://artists.proofprofile.net/proofs/artist/4f038cb1-6b17-41a9-b412-72332e46827c.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 0x0b83f8f3ccafe10e38623f374e52efad3593b0cd3a88cb4d8becd0fff944b47a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:20Z), 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/QZTB42484851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d15b23ea67ba9e909faca0e675bd725680e576473f1cb02a3c4d57f9b50074. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB92456446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fee9c55872fe3f306d0748145e431359b1fc7a73d237331255bad1b0158dc0. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CBF8B2445044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f769f9b22d043836ea482a28068ff915b9a32488eb77bf66112c220a338fb38. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CAHQJ2571818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc0ce99623fd475b7da3fc563927f78dcec20d9418508438bb99b25a77b6d61. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CACWV2529707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7609c3b7429e41c68eb580d89cf831b4eb87beb49178d64999e63dd0c42ebce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAENV2529704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc0ce99623fd475b7da3fc563927f78dcec20d9418508438bb99b25a77b6d61. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:41:58Z), 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/CACWV2529707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd2de41a70687757cf4fc69b3c7689fe9752d79b1afaf5c2ebb507efd259391. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CAENV2531766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7609c3b7429e41c68eb580d89cf831b4eb87beb49178d64999e63dd0c42ebce. 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/CAENV2529704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89cad2f1bde2cc2fdd868cfeaf936eb66773234f4f88ffe90ca77425527cd58. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CAENV2531767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f769f9b22d043836ea482a28068ff915b9a32488eb77bf66112c220a338fb38. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:09:57Z), 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/CAHQJ2571818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd337d16847887e862e62b9141ead5a80ed43fe1228f670f027a8a5fd3fe0cce. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/CBEYJ2474325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacfa3f86f7c96c7720d9fb1c1b6c2bbe902ef5ea02954038faab214fc48ee31. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAENV2531768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682b651d26e356378c2e6d71bd8f7f06c1767e342a8e5a8082d8d551f6bb2110. 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/CAENV2531769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ca567eaf22c88c77b89798b3261fb5d02ae365a2ce4533befb2d148154d2ef. 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/CAENV2531770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4bad6c7cf71137cf68411f016c1a74808d0fbf243a88052d7ceea3f05e3421. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:53Z), 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/CAENV2531771.