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 0x28bdecb65f68f063ba250a57724ab6116ef5d27422e3c5d96da60f87863af246. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c10a21fa-da46-4e8b-9f35-f39551932b60.json and https://artists.proofprofile.net/proofs/artist/c10a21fa-da46-4e8b-9f35-f39551932b60.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 0xbd949bf3d1f9f21b9861b88da39ed9e03b09945c9c1153cf89205da1edd353a7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:05:28Z), 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/QZES92017844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe838ec1b5336d8e726a5da85c9f21272b8c7b70be5b7943ea0431fc3faf90f26. 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/QZES92017847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89b51975277a889b5bb121be4834b6b74f9de1e905316b6b86569d1cd9dc7bf. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6F2027021.
Luz Verde "Dembow" (El juego del calamar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6873fa4ac61b2d15d4b4d8d0d51588df48d38741cce7b02a696f89887ed499. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZES52473388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f555938b13472ed03c90e38d04d2e3d07b466eaf558da8b24e421f3d2b64e08. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZES52470112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd22613f6fca5d0d1f4d8cd66a52c663503cfcb3b81b3ee0e4d3ef045ddb1700. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZES52474960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ca3b42d188fa10871f1e7db0e31c8301ed7f554b8f12f107eda90cf9d35012. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZES62460924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9bde0bfb74159104d49204c766523b02eb31d29ceba8220951366c07ca6e6. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZES72442592.