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 0xed24915fe3b226223572bb77e2afdb9a402e2609caa109633c3b2b8c02b85403. 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/746b4892-a008-44cc-b683-a731949d6a74.json and https://artists.proofprofile.net/proofs/artist/746b4892-a008-44cc-b683-a731949d6a74.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 0x570e9d6289d1ba28351c09a9507b7ba8fe2abbbd969321fbb3358395fc37927c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/JPY252300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ded36a469fb48122826d19b57a4fc021a88360d0ed83cf3ba68da973b13a638. 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/JPY252300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a2bebf9379dc9b23b9612d1f214d21d2a955736286da373def0f97fd632c3a. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/JPY252300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd79704b5945b99ee45e896dfb5a8b3c552bba129b81b97d20e38679a7d22486. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:51Z), 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/JPY252300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe106e79d264fa5de31e4601f7c0c05bb5b7e990131e87f9b2fedecc54f2af59f. 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/JPY252300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c42dea73d13a0d5a520c9e4691fd70eb39511027df1d4ab335aa57e1bddd93. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:09:05Z), 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/JPY252300187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891714e72ca76d11fe609399b91c4e2a933445e84a343cd7926f1c893b8a2998. 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/JPR502145947.