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 0xe73a429be350344132551582f92e46de8dc82f1ee860bd0b4e06f45198ef00fc. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1fb43048-96f4-4de2-b7cd-5f128065c912.json and https://artists.proofprofile.net/proofs/artist/1fb43048-96f4-4de2-b7cd-5f128065c912.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 0x7b4c6ff857aff3ed67cbeeeacaca46f92c7be90b4c9919e2b7a8e9e76fbb3af6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:03Z), 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/TCAGZ2386245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91df1ae1bcca0e18eecc1c53a3a6018ed672cf35623766f42026d4322e2bba8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHD2359404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2859f02de9e74dbde3577de6f590303afeabf0fdb2eecb030206195b65ed7e. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAHM2301381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdedd541578f8290ae5ec55cdd3ada371e51b99d2571697ebf7feb54b56e11d6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAHQ2342478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bf612fae56d9263bc7c4ae0ebb90ab1436aadee9f3bac0a11c2bfc90675691. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHQ2342480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581b3723e84b1cae6a25607e88cc7ca6275920a855e86263a1bb82ea0fcc6ee2. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:34:00Z), 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/TCAIH2404680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cfcfa3a14da1c89fda0c8ae3a4f53b678ac24404987620b14390e78a9f70d1. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCAIK2481878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f93bf7cfa04302c435e3de1a9465335645b1f792e3de33867692d182702ba73. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AMA0H2500187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc884ccc57415bda2cb92e1aa6d611deeecc547061841d4079243c529ff8da747. 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/AMA0H2500532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9617bf0185281eaef2cbaab427253b98b475ffea8671e35688e64d85754f023. 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/AMA0H2500893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68737559b31c5e90f293d756832ff1cc9744a9a8802425dfd05d0baed5f46b64. 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/AMA0H2500894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb257304049226ae496bbb8232e0690d72bcf4aebaac4a878396a427d724e532c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AMA0H2500895.