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 0x06d0fc7831bba35e7b76225f78346bd721b23e9f465d357e5ceb4b4b09ffe0a2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d02536a-8cc8-4ff8-beb9-1fed49c39c99.json and https://artists.proofprofile.net/proofs/artist/9d02536a-8cc8-4ff8-beb9-1fed49c39c99.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 0xc0c3d01d06d50803af67f40d2a57ed3636c630511657a2b98da168418ea6967b. 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/DEA621301278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55263d8af88e8452d8f5c27d7e3404f6038e6abab2d952ec347b34087522a017. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:05Z), 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/DEA621400378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84095b653b9ec0a2d1d0bcd619b053599ea357da41cc205fde941e01a8e7ebe8. 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/DEA621700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad940a7efac03449a71af5088d77a24a4b897c28ae91825ac0c1f14ceb721169. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/DEA621701663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad42bccfcf176a964ac51f2e5b8bdc236c97a63f7658c635afe3171ac43427d4. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:29:31Z), 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/DEA621701664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da4de5c7a5e6b2406281d723d8a50376d2d6ae75645aabfd534bfadcaabf5c9. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEA621701665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006429992e09144e4fd3a0b33324449139fa3ed7ac4ad67423366d2a4497bf7b. 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/DEA621701666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad8af10dcf8b6630cf47b98cf1d131dbf0cd1956f1ff084a61a4ebefd123e70. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEA621701670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3663a538fa07ad2acbddb31f725c872cfe21219f2df643f8f1dcd96f58bc9c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DEA621701672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2405c41caf620d229d0816b085571b7a0962043f7a887b93a970c753d676fe31. 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/DEA621400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f9e1065b4bb93749d4c6a1efb512ecc6faaf16157680bc840125a7668949d6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEA621400647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f9e1065b4bb93749d4c6a1efb512ecc6faaf16157680bc840125a7668949d6. 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/DEA621400647.