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 0x28ae06bd2815054a2c163c74c7c3a25cb053db147585917083f162a4e6b4840d. 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/4dd28688-c5a7-4518-a902-dfb9c7dd2959.json and https://artists.proofprofile.net/proofs/artist/4dd28688-c5a7-4518-a902-dfb9c7dd2959.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 0xaa998d26730a280ba40867000f2e4e80ea12013f545226da4e4ffdbc98c2cb04. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:56:39Z), 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/JPB451805120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123197107e0450cf6489e17ca306c7b8e8e59e488c38b438882fa699a81ff052. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:33:21Z), 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/JPB451805122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5eabd05a0bcc1dbed61fb544759a8c622cb675457b0284b4592a7d53358a39. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPB451805124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44680b5ee8c57aef2192f4d34f9dd2f6959228e8676d22f2a62d8d2a1e590ceb. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:22:34Z), 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/JPB451905269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090603f40603671492cdee7b8fda61532237629f1ce372e2da13c0dcf8e200a. 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/JPB452105811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66bfe6f9555523ad12ef437c5d2b1c7048357a6b630fa4e24aea365ca8d2ac. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/JPB452105812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c60e113dabe977182e64041ef368667502bfb71628784d3ac5e49084e1186b6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:10Z), 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/JPB452105813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99700f6d4df07805f6b33e3c4fe3e8bca574413a6dfbc35c0b7990b978cb37b. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/JPB452206021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590af9f518f04f74f43e84828a029abdb945368fa376ad73ed379cb5a571d813. 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/JPB452206104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d87bb1d01e1ebf8db3204c1f11232137e57d859f5121778f70bc3657eefb8e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPB452206106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7554ae5875305bb0d3bb6b13bfabef6b5280faeeb38217a9575dd41d23ccfec4. 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/JPB452206107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf3db43889d853eed1d8904dbc2d2a1610e2d78290402678d0ae4852dc9c6d3. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/JPB452206110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4f0be36775fbca00162953ca99f76e0e6d831d667cf75b7b19c3afb2321382. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/JPB452206111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e18635d5d00bde7bad567c43194eeb82205c089c765eae5ce8f0ea4e774f8b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/JPB452406564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2cc93a445ed52b45c7721228ae1d126f152e1e045c7d9966eba0c9bf6fbf67. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/JPB452406566.