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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9767fa25e6fbce97aa2bfed03ceb7dc6e300f763eab24d45ebe9545ae0e729b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c98c3e5-36ee-4257-bd2b-6ea40c0f8344.json and https://artists.proofprofile.net/proofs/artist/3c98c3e5-36ee-4257-bd2b-6ea40c0f8344.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcacea262c2a1f810bcbce24f7b622807843e088f7679464b1c7d4403cf23c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITR551900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0374dba4b71ac8b0fcb0d6b9a7fc65fbfe569dca84a174c3ea543f9d0f49a7. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ITR551900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262b9d4593d0ecea18940fac7f5a7a938a01549e8fc9161cd905c5eb578061a8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITR551900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a8ec562d8f20f2d5b120288b10e65da1b2070a67df63b867a6beaa2038c8dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITR551900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f2aadb7e7c596c6945bebae1a80ef360bdb16a9f2d7890effe0ce066fec12c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ITR551900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31973ee3aa09efbb1a7712b0564bd8aec058d57bd646434f48917561b52769ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITR551900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cd58b803789f6da476075171b9756c04a4bff686094b39a73348f04b350f94. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/ITR551900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d8b3c2a76c22661e8b2348d46098d43da0882144338af1d29214c3cc72d8a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITR551900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b9ff2364f253c40a4d842e50b321b530b70e299e1415563fae5ecf04cf791. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITR551900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059cb2e3935ff3e23d8911e2063ecf83e4b42b10dcb23a81385a155e9efe9b8a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITR551900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe005f08ec74738b6279c17745ebd701786e84e7feafd45a0a8b3561226f84b6f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITR551900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb49ef8cff46e25d92aedf2de28f179124e3993cb13fc8615e11fb20482dfdb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITR551900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc287c4e83d045e1921cc85f1ae4cdeb0f1a4ce6250d35ecde46a8d5add9a23e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ITR551900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173522c26c014a54151d42514c5d0433d13ae85b21603a664ed0d03fc956a580. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITR551900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9a2283ed71262baf45144b4af5c969e524abdf04d71d4169b1aaa2e43eaba8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ITR551900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf186a3bee0a297ce961020929839c52d3e2cde1182ec2907558c5200699d6e21. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITR551900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79451bf41480781d759ce9979c98319c7b17a1e11038c09eba5b129a7f102212. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITR551900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde731a54ab308221e44b5817d9cdd6721707223b95cea754b216063c03e51392. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBPS85481508.