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 0xdb53a7c672cb1745e447a2961705129fb18fc069b11f3cc0db2593323bc1b25e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ad44e3e-d54f-402b-87f0-d43df2ef8ec7.json and https://artists.proofprofile.net/proofs/artist/3ad44e3e-d54f-402b-87f0-d43df2ef8ec7.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 0x49cb51c0f4e60548dd9c18c0561a260d8b71e3ccbb1ccad520bdc25efbb48ac4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM6P41892348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a284f4c74cbbccc57359a3ecb7fc139cc11fa4633326b74614001345693823b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6P41892349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6a419dc77a24b166df6d845144e5523b63b39df04c8f68f3b49d174156c977. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:35:08Z), 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/QM6P41892351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97adf84264fdd60ea5fa246db43063c986ebec82451e33eec28071fa51709e8. 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/QM7282083822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55dc438e6da120585698836d142f53cbf0e0b155355ee64dc63f1b538aae5e7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM7282083823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1511734b1e681724ece693bff8423b5eb241d025fe7e73e56ffd9a80550450bd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM7282083824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1d1b8f627d5c9470e9b0bfc4c5fcd913926b1a4bb9f8efbca558796870922d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:23:45Z), 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/QM7282083825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c16401dbd8dfa90ccdd22bcb83daeb8dd226f6def6115dc2b3836bffc2a47c3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:33:59Z), 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/QM7282083826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2c5d0c672b6ef3f4732c98f569be120b66739ac73bf9e147055624de25e0eb. 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/QM7282083827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46073e888296d63c7cbc21899b32852c881e29854bcce697daeefd9ea5a0dac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM7282083831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8db467536a166fca83a11ceee0e499047c9fd22105965377039801b2ca95dff. 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/QM7282083833.