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 0xf294361d7049770a98f950fae1f36d9cc769ed94f1a5a772b87db8186dfc3c30. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab0e23a7-0913-4274-ae9e-3659ea84f295.json and https://artists.proofprofile.net/proofs/artist/ab0e23a7-0913-4274-ae9e-3659ea84f295.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 0x3aa5a62af38b774b261e4f70d859bf9201cc78402eda095f53d40b572902b7be. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USA2P2417661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524d88395a84049d5744d5e85de1056eb2a74ce6ebd903a5d3b3dc96707aa531. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:04:35Z), 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/USA2P2470991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa5a62af38b774b261e4f70d859bf9201cc78402eda095f53d40b572902b7be. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USA2P2417661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81da63d1b9cd47f703441f365cf40d617b84a6f5c55012036afbba4f12336b2. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USA2P2470992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1665e77e17459d5810a7275d90f569016429f14c2f8f34cbc7f791c0268be48c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2P2470993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa5a62af38b774b261e4f70d859bf9201cc78402eda095f53d40b572902b7be. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USA2P2417661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d52150a6fcdc2ef06191da1d98385e8a7c4ad0855117e8b0e3fbf5cb03ee5ef. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA2P2469705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15500c52efd0726cf9b66abeba2871e5bace3eb0bc08afeb33a55350905eedf7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:55:57Z), 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/ESA012546298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15500c52efd0726cf9b66abeba2871e5bace3eb0bc08afeb33a55350905eedf7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:23:18Z), 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/ESA012546298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6703b1d5d6fd01a1c5c838a918f57ff5af6b1870b6eb14fb9e9bce3092919259. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX8LD2502512.