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 0xaeec1736ab737181db9af36aa8d797a3335e1c0b09e5c021e286799d4610b981. 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/b1eb92aa-10b5-4cba-bdd8-23a765e5c499.json and https://artists.proofprofile.net/proofs/artist/b1eb92aa-10b5-4cba-bdd8-23a765e5c499.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 0xcbb2e947ff540674a75abd6f48ff44537c9b6fbed48f1bec5f28df03a0a98a7e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CATQ31500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2445bdd61acb7cb95b6f0d18cf3de937df35b4ed26cb3b01345a7999ecc6e83d. 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/CATQ31500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf823f6052a47b2cfa6e4bdba71d7674519dbffeac46485616a46732d30776201. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CATQ31500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c38bbcb42560ad58898498febfa51aa454269c0edf861c829af56d6b897248. 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/CATQ31500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40051402848386ddd7902b7e657d366a38cd1ba247b42ccb9c911dd5c46260b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CATQ31500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205984f9b8cc9d8554c572f2a1418bdfb524110dbfab0e429955f5b637c23ac1. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USDHM1801192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26d3c57e34ad336f468ac00cc385250bc36c5f0df236f9e9d1dc07d5c77b137. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:03:27Z), 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/QMEU32014273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fecff934384f64213926872e41b61a2a65ed8d03ab2bb7777e32d748728175. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QMEU32014276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db6639a0d90f2d5a8c71e87948090fb25970156868d95132354091425977c13. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6MZ2392096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd444979237a9841572eabfc174a8830c70defde98a9b82ebfeae929d616fdbcb. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QMEU32014274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa3355520428a2710c34c076b88bb5f54e9a38e653515429dfe89b8b6d8039d. 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/QM6P42313764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6cbac2c56db1d87e57030617acf821641d02593241b328a44aa515c2fabbaf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:32:20Z), 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/QM6P42313766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73985e5d4725fcfee4a052d6347e2e4e197438ff1c175f36edb688194234b4f9. 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/QMEU32014277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d60fe811c55d8d0ef56f45ff9660d553a2e1d7046d3bdd4fcf61e10a436f30. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMEU32014275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd643a0db4453751c8a843dd0974898858d711f3b5edb3256b36cff516525e3f1. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:36:21Z), 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/QM6P42313769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08829106e242cafd036a2a673e4bb107b6873d55ad4246455983611e54a249ef. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:50Z), 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/QM6P42313782.