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 0xa1fd0030affe763e9aacc6234b30cceed8432934c241c50b4357559f51173320. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70c28fdb-1215-4b71-b52b-7dee61cc0cb5.json and https://artists.proofprofile.net/proofs/artist/70c28fdb-1215-4b71-b52b-7dee61cc0cb5.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 0x5ab5e67326a8ac882faf515a93c91d10c9c3906b3525d13543c6b8fcb1971779. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHB2334142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d24927ae6530aa82b32e0da2ab525b339d26eae445fd4eb2eb01fe506a5ea6. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCAHF2321178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288ffbacc0a356b605fcf77cd86d424ccd1ed76c3e8b9ff30fccca231d8ae413. 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/TCAHI2336549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835ce1a428ab7efa39197fe27caf9e40af329fed05eeef2a132e0db32d56df89. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAIC2405703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ebf7e7ae606b4706df92f5125de250fa6541543cc81cae6f5219bf4c0f9969. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJP2552246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c12a40485d2068e61be34feae34ccdba58a6d36b5bf1291a79af5e148a06f4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:47:43Z), 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/TCAJR2594920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c7c61e744c71308ca0d3b184d61706ec236695a90c179593e1b9bffffbb023. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJY2551751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2cec1572b1873e3cfd47799a01487d2c4073f37ed3c8fb81a4b41ef01d24bc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:55:52Z), 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/QT65Y2541653.