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 0xd75faa0b897939fefd2748cc37998592ea59692b35ff92f23b6ca7a4bfe6cc66. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c38ab9ec-a279-40c2-8c62-17c4a7a3203f.json and https://artists.proofprofile.net/proofs/artist/c38ab9ec-a279-40c2-8c62-17c4a7a3203f.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 0x2dfb7a03cab7993b306df587094ce5796c4f62d1caeb8e3efce39d7f83184983. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEZC62434920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4a525dcfee8a6469ed1e43cb95d15f6202193d4d1fcd75c289f9b6f44042c1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:03Z), 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/DEZC62434921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed0ff92aff4b75740c3c8e46ea53bcb067893970d8adafd658931a6ebd5a4fc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:24:15Z), 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/DEZC62434923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbad256884f3606e93ca86200f4ad7530af53eee2bdc33fa10d73a7c61c2572. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:16:51Z), 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/DEZC62434924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2206920d0a8c460c3a05acae70bde284f6a3a20a8eb31701623d286d5d0c10f7. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEZC62434926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab93cf8f88ae258c10ed4d0d0aee7a1eabe3098a66338e1227a3b9c0e2705a4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEZC62508468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d286e39781e74512668fd572c09a9067ad6ed9ed3c598971a7d754f794cebb. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEZC62510466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99c8b5540b321bbffbae278a32f8242de591cbd8b04074d029c7a2506b12e40. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/DEZC62508470.