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 0x3106146240a67fb4dc18f105a7a2312a4f431815eb49ec503142b8852619de97. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5518f991-7f34-44ed-b505-cece5c684aef.json and https://artists.proofprofile.net/proofs/artist/5518f991-7f34-44ed-b505-cece5c684aef.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 0x3d123a72961ff588dd0d893b866036d00a46b70de017700198698b44e22d021f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE2621700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d7f79e5d98880f570c13d73a9fe9d37ebcd09b72dfa9766ef9cc1f0fa0b2bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE2621800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a721cf18bc2accc27abe7e6590c76a0a2c31ba6958493dc68fab9a0b1c0304c. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:10:11Z), 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/SEXCG2200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da971990ed14da96f2c109325336109fb2116ed034188b0e1bf03f9cce002bf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:54:55Z), 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/SEXCG2200506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa94731531f079001f37fa77e79e905b70c8b43e991a149cc7d131f398c4544. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEXCG2200507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4924c36c67410215cd6d73ca29a2344df0afab05e349707345951de5ae292821. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE2622500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb416c1c65737e9162423594b1bffab04a0a52498f0e8015122a81b117c9d62a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE2622500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d2feffe6eaccaab375ed8fc2cb884ce7cd4d08b71cfa567c48be5f65b4fe2c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SE2622500108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ff136891ac5ec5d2e34d56260e7925487ad5b086ad35c8940106df7ffeb5d. 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/SEXCG1800701.