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 0x0f2c1bb4ef635958555b080f51633ddb893f8a187768a0ffeb43656ae0e0a394. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2d6b382-377c-4b25-8b23-757b7b80f887.json and https://artists.proofprofile.net/proofs/artist/a2d6b382-377c-4b25-8b23-757b7b80f887.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 0x2461cdac850cdccb26a5eb07d769f5a48c094ece69c598818e7e41c738d838e3. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/GBVVQ1023821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05db55ccc2ee3e26f9f2e1e6e56757a7630ed364bd7e9bad4838a6ad419bbac5. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBVVQ1023822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabaad83abb2e85f99e84102a8c12089de7898daab0d20209700b754eeafb7ba. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GBVVQ1023827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91be266416e1112e292ec19a91665eebb9f43bd6506b6072f5549dc1d225c017. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:26Z), 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/GBVVQ1500691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b3d3cc03f55a7cf75fb55f9fd08497b830d84201ac0fec077c830ef133918a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GBVVQ1500692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8df1769cd6292aff5b5e165ae3e970436f87f88f646f4a33f48a50514606ae. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/GBVVQ1500695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336996899ebbfa0fae420943d56116426cf1fe9292b4f1582b0078091e3466bd. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/GBVVQ1500699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf840390c21fa84d49d2d8bef5427b005f4196ea9f4fb70e4e1f84307c3de6996. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBVVQ0900294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93f08abf4ead268e0c2c6d6bb39a2a6f893ec701a55f07f4d3a665cf1cdb58b. 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/GBVVQ1700287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136a4349c4de624d10a9c205be1d37b71896eb7d1d060574bacf592b01cc9704. 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/GBFRL0900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2fe24c75c4d38afd5e4f08f0a4136cf5aa4aeaeee4b2d32a8213001de4b976. 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/GBCMZ0502805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34454ce3b922c424209a2eb9ca6c78bd3a506bd24b3eb949685533bf3a644e95. 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/QM4DW1770908.