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 0x553800d0b8337f93abc858b965f9ff840c29145af2498594a9f2df8630168405. 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/d31cdcd3-217b-4780-b959-21eb561c7a58.json and https://artists.proofprofile.net/proofs/artist/d31cdcd3-217b-4780-b959-21eb561c7a58.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 0x4034567d2617298f173c8ba561f692d25cd67c50390e4e2e76f1b2f7c4ab285a. 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/FRZ369600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5265cf81bf683f39f16abcc2bfe26a601f3c89af26aa026f9d6b3a5c91cbd296. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:41Z), 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/FRZ369600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b57ace27cc131c827e3495e925563b3e4c24c48b434dc74875a6fff08da32b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:03Z), 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/FRZ369600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeb3d97fd7df1ca5380984835a15453c7c58043f6b79f7cc0dcc47abbcf6170. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:48:24Z), 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/FRZ369600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5010c17d1fa2ed78bb4c8bec497480c0b220e856c51ed954ca92f8ac19084d. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRZ369800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb75226888380a5ca1be1fc6955fe02e8509b0fd5d2b17c10c78429b7839e89. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FRZ368000059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24953aa4c1a7c7632db0df1324d9b99df8d04853aba3fa6fc911d6313b143632. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:27:01Z), 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/FRZ369600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6991bd016a870ac002251bcf4349eceadd858eb13ba3c4298c0d894e4a2fd0f3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRZ360900302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fc47398a2fc5b90a1f39f354f140d8a5a73b4f8afbe03ce1aabeeeaa41e1fe. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRZ360900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa115d107c376f8de5e253c742d71b4eaa705035387c3a42a3782137abc3c4c27. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:22Z), 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/FRZ360900312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3b980c0b4edeeabe29996baa4d4d312adeebc77f10cce6891f8a9fb5206bd2. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FR9W11800919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff337a728386403c40e6e696825c41f721831e40bf0b276869d8d12e6fab10a6. 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/FR9W11800922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089d12bd8e251f03442e0a5746822b9cea517333c162d2e622c30d97ed0e9a7b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ082100344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089d12bd8e251f03442e0a5746822b9cea517333c162d2e622c30d97ed0e9a7b. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FRZ082100344.