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 0x10be53d8ae9af81ca06e28471a6dec8ff16e42039a08ac04fa968d716b06f803. 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/dfc2863a-0209-4aa5-9992-23ba1b9fe40d.json and https://artists.proofprofile.net/proofs/artist/dfc2863a-0209-4aa5-9992-23ba1b9fe40d.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 0xddaf56723a885121651b7287a4aa6dff7584931f217993d2d5bc58091600e84b. 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/QMEU32308439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456973464dbd12c80df1c8ee9b5019063662e7f6e2333c9726cab13fe61affe3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMEU32219775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd882e70db4fd90a24d9efe6399c05880598af1ebed375648c1feb3e58c0884f3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMEU32217389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf485bc1de6ed24093051dd0a173d386cfb68eed7fedf1c9cab79cafaac080c46. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMEU32205724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d801afd670d248ef26b8ab33229a1948b2b3048c39db9f9dab93f3f7045897b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:02:46Z), 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/QMEU32107209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a0ddcfcc955e768bcab6a490de0c4934b5d8ea1e24b2451d694ddf9c4f75e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMEU32024046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaf41a99853841d688fac20c4a100648403d84b775713eecadd85400da55fcb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMEU32013736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8707f4bfd4a604cc7ab04770b73dd420f41011a833317948a68458a791254791. 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/QMEU32006234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a1c2a16a1587c7a5d9020b042e571e9576737d8a4b6041bcad98ae8d4c6346. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMEU32003613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb29cb0447e82c1c0c3b93334283269cbbaf6ce7b71f410763a33a34eb922e9e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMEU31918525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4672190b5bddec3bf52101e3cdb915fd176559fc28fd570d7acaedeca2753a. 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/QMEU31910021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16141fae8396bed7841dc949903f268ccb3a0beb4307b5d781ab23fa306a7e7e. 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/USUYG1152127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1637adee078feb3ec6c843b525745954293d4c2b1279cbd14c4421515ceba7fa. 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/USUYG1101507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d487bf649cc231c79b36bde466e16f87b45cb73d42b389ee6db9116b0f68dd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMLD61408027.