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 0xd2d98ec72699bbe711d9f1eb8e4f2ef32d9fbf58d657852815c045f96f2ca70a. 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/a390e945-aad3-4b39-bf62-189b624b191a.json and https://artists.proofprofile.net/proofs/artist/a390e945-aad3-4b39-bf62-189b624b191a.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 0x8392d6eab7d0f43f9f224661d7f88c89fc66111fd21d83b5c9a50197aae51e81. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCJPJ1990301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab916b0102cb88175904b75b569cfe2d0cbb54c3bce0be2d00f0f9432516184. 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/TCJPJ1990303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3743eaf07800d23d6c6d02403ec81535540d6879963db1692f7aaa46619921a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:04Z), 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/TCJPJ1990309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dd580a97ea6ea8b316cbf192a8dfbe7246c78acf7388cbc8374124e93d79ee. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USA2P2128529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a3c62a9bfc70f5e3622d094fa3c4aeba6e433b74751c61ed3aea23a6b3ca9b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:08:06Z), 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/USA2P2153398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6db012ce3b58c4db196c04ae119c0fe0b951bd9cd7b619d40c216b2dbe88c9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USA2P2229815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7136fde1b7eabd8f50c7c5aaa9ff2b24c6350d8efdeceb0d41ae2d0ce5afd6c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USA2P2229819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddf7e3e7bcbee52c347883c81c69bcba480792c1811a0dda007572fb2f94cba. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA2P2229817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed774ac7c848153b42a04125ff9c7d0e9885eaf67206eec9e3ddc3f01fc54cd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:53:03Z), 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/USA2P2229816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532160b49da4ee4941760eb35c7dbafac9f02c59c0699c6f70045b1b39cbf230. 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/USA2P2229818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e900485c45a95a4250150732aa88d3263f4d67e05644ac2762ec5b1c2349cb. 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/TCJPU2389953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5063ad9853bded2dc8ca24456384f90809e5c0d348b384b649d1ae1b97d0eb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCJPU2389959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf2f39cbd76f30b4d120e459a30139a45487138ace5c3ed6345f10842181f23. 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/AUNCC2400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021149d620c4a749d206d0a070746c65aa6a2d414b98b0cfeccf757fe6816675. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/AUNCC2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4739c92e9a93817b83e0a38980e3a33104db2d2f5f82ea114c1e54db960c0681. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AUNCC2500080.