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 0xac563e5baa9e88e26eaac71f234d6b6e786e716b77041ae56563ec168f9f193c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2dcca25-42ce-43fe-8a08-a7091bd57cf0.json and https://artists.proofprofile.net/proofs/artist/f2dcca25-42ce-43fe-8a08-a7091bd57cf0.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 0x25ff163ffc7299e22e3ff0a3820d97b7b5ecc3d4c5f150fc04c6275f708509f4. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA72424376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f02fb0e468595ff5167c0c151cdae4f31841897d7fcafe5144701c49aab395. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:09:46Z), 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/QZK6L2483467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915df271f5660467eaf688e13fe68605f3edf1c4cb8f3a3f41e99823fb5a538e. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZNWS2431283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532ec16e75f3101f1bd79dd9edd4a0925b4443ded40c062fa96ec0ceee984db4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:18:18Z), 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/QZNWV2417276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e1d06ee476544c987e58d9b4ea7a64adea93a7cf4b77488c51c4037448fc0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP52429881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e63b7e0cb1123f8fff4999e3cd82aa39ffe456a8630c089baeebc5f3173972. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZTB72434373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304417b695f1ac341a265d83882693ede326dbc073c8806db30374b22270f9bf. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTB72434855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bac6f340605a638c31840af11e2d27eed09e1c882ce274852770cca90ae0c9. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZWFG2453575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad13f5adea37fc518908ba4deee7ab8c86a7c5bf777f0acf47d8af3a75938e6. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:04:28Z), 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/QZWFT2456239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd506fb48605a4ade02e292806f9130c1e87064e343d73778b6dcc6a977ed8253. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:09:49Z), 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/QZWFV2474034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46674c05d6adafd101acbde58e8d74f25a609ad23820ab3ef3afebb055366826. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7N2477385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3684de1d08624ae1290b0a351eab5cd2f01bb3534af9f47383842b612c24a2f. 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/QT3F22420719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d807b438cba1e5eb861efb44bac022dd2fe69dba1aff203e13d6580e6b49a2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:33Z), 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/QZFZ22532893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d2fd7a4c88dd277b95ae8216e275dbf7c6f94a4791146a28eb98ba2a15b733. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ32546278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d097124f09dcc877b130cae1222b1d9cd0a38201726b43387a83880d070a660. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA82573827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1df8736f29ac9f04dd882944c655bf2b1d2f6f37a06d6cb5c7bc86e63389acf. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTB42504564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb048784f1334392bf87ae5353d16f5a8fb3c929afac417fbf52a0f6ee12fc1ce. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:22:02Z), 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/QZWFP2597905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedce0633614920292e424b6e1e339b241855e8e43fd41affd111fec93015da11. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZZ772536735.