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 0x5716168cc162d683454f19a68bbc3b3d4fb74ec02374551b1e8d2d31734be558. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a54bbc9-8de7-41d0-9f1b-5230da2830cc.json and https://artists.proofprofile.net/proofs/artist/0a54bbc9-8de7-41d0-9f1b-5230da2830cc.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 0x2e486b79d2b0f9a5621b24ccf815b744333510ad50751462d902c773b1d6877c. 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/QZDA52313138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9bea9af17411de9e854eaa95b1b027c87327cd8701a56bae20bb75c6fb39b7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2338853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac77f2a498471379cb5042a01b3cc28fba02cbe38d74c9886f842c9d9c159e1. 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/QZK6N2338854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08543ff011011ae8c176a8dedb6259da487667bca7b0fa1d69552da1558595f2. 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/QZK6N2338855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ebc0890d712f913f04f6b512b2ae9a14969c666189f42fec736108b4efb183. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6N2338858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2495b5d9d4d04276c3822bc4634964672944bbbdc2761c4e3dd7f32486f6f414. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZK6N2338859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3832fa253ff1fb062e268efa96f5806c37e7e6ed3fb6ccf0b0e8e90046edff3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTBA2476476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722febd3fd956c2f2b6bed1716885540d49aca1b05ee0e9724c2f430d45ca78. 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/QZK6H2433665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adc684e72a33ecb2d7217b3a30b2e3c92e4e3722a84a5c59af0aeef4b579a4d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZX882420000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b83191378419913fe5933feebb790a2c1c2bdfdb07d86c55883b90dda58cd68. 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/QZTAS2411524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff59d05e0f1dbaaf181e52dd906feb96331e8998eb15b7434694a7b0d746bb5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWQ2498134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722febd3fd956c2f2b6bed1716885540d49aca1b05ee0e9724c2f430d45ca78. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6H2433665.