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 0x65caef8bc2e8c028b66582f1c7549f879b099fdf559e6a8362d3b5e8a6e160c1. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ab0366d-54ae-44f5-a15d-e84ce49d15a7.json and https://artists.proofprofile.net/proofs/artist/8ab0366d-54ae-44f5-a15d-e84ce49d15a7.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 0x3d1fa5c9af7fb9ebddd1aafd14e45440c4aca793cc68e313ffc11bfe71008877. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXH2J2564831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa177395c0b928a54484827ebfe3971e114c35030bb06a2ef0a4d6d288fe6c67c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GXH2J2564862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2440df761f1ba5e825a6eb5415e18eb6b9dbdc552354d76fbe403650f43332c. 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/QZDA82429845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e751e24fb5894827ec3ed1ae5ea78e040ecdede5eba6bb3fc24be251716d25b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES62489950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e592615d0236b2ac30c192da7ac9bd33e561f85197995116fd72f0b56b8d3d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GXH2J2564829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93f46d6397c40503337df8da903626809c0af8b3cf20cd735807a626dfccf72. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GX53U2401792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18db475890c1c717b32f1cb5f6197e42b8ce9f30910c33f8fcaa0ae9bfd0139f. 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/GXF9Q2565940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93474fc857b618c1799f484dd746a9cd4623d043943acf00968872d9a29e2eb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GXF9Q2574702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cf7cac261c15867893f23e364d737536588db2585fc1cc3c377ffdb17fca2c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXF9Q2586212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1861ce5679977db23faa6d3331e1daa9c99a40336a638b457377b74b70ec4c. 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/GXF9Q2597618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8207ef77fd29783a9cf183e861ef9b7545e7e6a5f94b444734b6ddb7c3243bb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXH2J2562291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcccd0cd552e9285ff8882687d0c44e838410a34c3b402e68ef17a48d40e829b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22508808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db10c407174b067f54a757dfd21e03493e79dce8c8d308dea768ea660f9774e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GXH2J2563697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f740e14891bd8a205f45b2117a7d86c5d1b7009785d10db8aa90e66eaf2409b. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/UKXN22514442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf47b49733cc27f295077cc8c98347c9c32d69b135e321f8d87d4e7a5fb42e3. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKXN22519931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63adc743dbb18c5c60ba3b1a4cb6cfedb960ef6ba4859eb94203c0583a51e017. 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/GXH2J2563417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280c62f0a60d88f184e2d2c040d426adad7e86e1ae515965f086bdf3869d2149. 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/UKXN22523463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd0c8545b28abd2a33838fe1e2de15c16e41e79342fe86f84d4f39abde253a4. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/UKXN22527474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc35f1abfd5cebfe292a31a644f04e2357c3f8bf5fe4b42be8938d8928997f10. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/GXH2J2563702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149cca8c6f35a9b9fdfea4c2c8394d8696ed2d30bd9457c91838a9585aa4dfcb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22531063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9065a65605ab6873ab3149e3f134a3fab70bfa536496738868cf76eb86857. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UKXN22544772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680ede41e4f85226971ced61c00d52b4bad2b7677e917c9cb73a4d7fc511d2fc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXH2J2564864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03c9db989a888b6bb58bb208f4af3b84cc314958d092f273b084ba8200b6deb. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/UKXN22563343.