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 0x844fd5d9ccd71881928ca85070b6fa9720dfd40cb6348c9b64c540ce3e773ce3. 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/8d07f0e7-a111-43de-a3ec-c65208f55384.json and https://artists.proofprofile.net/proofs/artist/8d07f0e7-a111-43de-a3ec-c65208f55384.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 0xcdd78f1b21d31d12e0a04c0839e89a4a72b7cf068ff15623257b7c1f9bfe677d. 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/UKACT2270657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05885d8bf87894fc09e451124da91e9fe696ee5d7ab400be1cd17224f586cf48. 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/UKU932232289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b0256b3c056d9ae84620139f238833f9600c128d3139e0d60019f81354c03a. 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/QMDA72301373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebf1f3c61ee2c0175bdc0ba160b88bea7a34489c26b9a797ff63f41abfefd3d. 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/QM7282373564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb623410dbf0f478cdf5ed384b463ce50baca03d3ff32c39514a5de3e426ff15b. 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/QM6N22302662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4539d0f412d863de5d875e17e24ece40b2448c6a9069af761bd9c03554c9d3e9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMBZ92269302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346f0517907993b91b5eadc5549ea22b72ccd3a415b21998f13a25bf2c63e6cd. 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/QMBZ92269238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c8083d05e36c4329d4060598f33885a5bd350529b2f37f2ade453cd2ee2a94. 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/QM6MZ2218642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f30610bf9f7a2e9390c7c916bbcb1a9f5a318c9f2d2c4e259bb8ac7f00f6763. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QM4TX2280157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e57e6a8002006569a981648344b5fdb88e6846c814d69bb1b253fed1b54475. 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/QM4TX2233646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46d93261e5e32b33edc840eb745e6b7385e67f8eb2082a61bd7fb2e28e2ac09. 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/QM4TW2260141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d264c1360747f0eb25d1bb395778393a5360bb670c2bac38e1f3d8781edaa7. 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/QM4TW2256428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743e773ea8d79f5b974d2534ffd1c6591cee0f70b696a82a3a94808548c02d12. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA62189948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09453218b034ab8b278de8f1d88742e13bab9e59076f5fe6eed7e702b4c1e1c. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QMDA62147958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756f5db3dc9462bc5579a24a05aae53d7ad512506200214518f320f9f0086540. 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/QMDA62147962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa494c436afdc1f7c59420c5ae10c183febc6513d89da06a2706145ad72b7edf2. 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/QMDA62147963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41934c050d33cd9069dd7e3698dc0fabbe6356f0bcc9b82eb549b89a6ea50da9. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QMDA62147961.
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 0x2c187f6c012fe760bcf833a73e52d7d54c037d43f9736a0a9408ac8df745db0f. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QMDA62147965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a882ff06e899791190bf6312b0c600767fa6777001a86c414e8585776540cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2183339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d40219c7d370caa466629de2b96577b645cc317edc633d45e7e1b9660347567. 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/QMBZ92184893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1dc4393735d86b928ac0bb859861be9b7a5e1380d0d5e081880235ff03a54a. 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/QMBZ92195381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f890327fe9f8bf6ce8513376b35f4f381cbf5037acc32969c4d474c81ddaf6. 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/QMBZ92184913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15798d2df1c96b5c2696e6d79150a7b7ffd21c6eacdafa4e68f7d9df8cb1c0f8. 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/QM4TX2106665.