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 0xf023d739ddfe492e65ee39425bcd6cbc402b2dc1a19c1ec9afdb740926e2cbda. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fee306e8-0587-4d6e-b6a7-f31145aa9e8d.json and https://artists.proofprofile.net/proofs/artist/fee306e8-0587-4d6e-b6a7-f31145aa9e8d.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 0x807a35959093e2da8f999dba10f2a73a39b64900b4926e623454107ed8376c78. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:22:41Z), 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/USCGJ1512776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076bf5482cede445690eb8cce7df4bdc6b54f33535751f50a8dc2eecf76742d5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:03:54Z), 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/USCGJ1794024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c8aae0d522c355cd616e6f20124930f35ad962f18dff069fdc39ee20f50def. 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/USCGJ1794025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971fd3eec7978bab738e9043f52102a1813b61a4ef3d4c35be9a37bf6844d3f6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USCGJ1794026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc66441fb32e5271004d1a8f7edd226eb10f36daf742ab07dd4f4f06c395240. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:59:43Z), 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/USHM21943482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3525a0cdbc3b1f2cd2da37c23629ec71bf91a1d4fc6753fefd1c8e37da3ff15c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:40Z), 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/USDY42005064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac69c3850bba07af8ee9c0006b4bb1f2f1ec440a904e16b090632318e0b9e83. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHM22023223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39895913b3729ec8a36c08031f3b825194a520a13b04b3260e7460f0aa95b16b. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USHM22092899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a3895678f7a993026ed81bd4a8e74bbbd1c5f9a837cc144aef86aced3ce411. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:59Z), 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/USHM92034444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdb0dbdfbd83c7f51cdd5b98985c3657b964cc791bd5ab65f29fd0e63cbcfae. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/USL4Q2048435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81c5f5a502608d7a2ebb2040591df0ba37d4d54e3b7dfb76bd900c27877b1c0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:16Z), 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/USL4R2097438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa93f14319a8d3e1f4ef1427a3d6ce1b3b45f5e15f2af2fbf40d83281f11f8e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ2136411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bafdc6b93b265d4c23e7c0894cd57e55b3b37d0abb02ff82d82f5c98aeee89. 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/USL4Q2165922.