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 0xd65a8d388a8a5e617daf782671dd5488877cab4aa964a6e1116a604bec2a7543. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5052bf7e-973f-4d42-94b8-483ad19198c9.json and https://artists.proofprofile.net/proofs/artist/5052bf7e-973f-4d42-94b8-483ad19198c9.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 0x68b1dd47fbaf1363c564472e9d9ddbbb6bd767ebc0448c72896d137ced8f8218. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TR0522401854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198117c400f040ed4dcc7131852f89883d39f99f18aa67778cf8498657b2e011. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TR0510601558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fe51fdf8aa38e40b6e5d3862961860ee6be0ff591b6a4e19ecaa57bd4e1f97. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:56Z), 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/TR0510601563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ac7121ebdea4669069bde98f4f9d9fec097662caad138e08a0bce8232e89f8. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/TR0510601564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf033eb204c1c28036c61e507ef52a51eb95035c68d2a5e4b951b52654bf2f5ed. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TR0510601568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebf0e88e5b6b0a9b28ad7d3589712703d3cf681ca5706d34f8d5e1891269aa4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TR0510601571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c40ea8a0f4f18346f5c0362d19d1a4edcbde86f95b66cf9b9f48a0143a14f7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:55:05Z), 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/TR3110600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563b513d38576b4f408ad7c81c8d0bbf30e31b2c58a5fc1a339c733898ae76b1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TR3110600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f66e20d060a3d75924ab8081a95df6314e87ac2533653c25269c25682c79096. 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/TR3110600042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa881f131f5156b7a80637a351eb24eae88231e7c1ccd0df8048c6896051522f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TR3110600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149b3e0dc68bed0ddc40b9d21a07b12e805af2094cc00ea71737b632bf46fe95. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TR3110600046.