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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 0x35a188277be2d0c3c6c6e12b23d8b63d31d930ca974ca043f59352f218a71a9e. 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/9c66c925-4206-4cb8-a1c1-14d38279b452.json and https://artists.proofprofile.net/proofs/artist/9c66c925-4206-4cb8-a1c1-14d38279b452.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 0x2708cbd0de38a1df8c5d501e35660a328be2dca8c01ab359dc96c16621e4e1cf. 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/DEH742207866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed947ccc9b3b85639491f25e1b889dc87ff190942670604bd2f61ab6ab3f019. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/DEPI82433195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93479f13cbf0cb0a1819d9d250d0a12cb886a429b0b7137cbda3bb1428539af. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLCK42419638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa053b2aa68976340fafeab58f93c45c546dfcf599cf6666d7ee457ec72a9519c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/NLCK42500842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd992300230336383b1dde805a755ce7d835b7984a05571cf8c604a1d8d87636. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLCK42500843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa083551831b0bd9fdf39ce586e387d002b543c994328b3a02e1ebc3bd9a87c2c. 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/NLCK42500844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a51f753b0e3d731fc766c96c9dcb40b425401636684014d526f35ed8b422909. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:51:48Z), 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/NLCK42500845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef298feafed6664eda9083a8d4d2da0bced4b8edf711ba827621d4b562818695. 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/NLCK42500846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d907e1883c41093efcdf61ab92acd019a466fca6390c29e5d82c8f5488d667. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/DEH742504026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb825dca455e41586bc78c598b5f43c888ea00a56870c82d0ad53446511de1cbc. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/DEH742504027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328c5111401f0a362516d0963b110826f1bd6b68ff185c92804093c5e356d8cf. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEH742504028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c41ef38901cc6e7876ab391e6118e0cd356255c913560a74765f272f67f48. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:29Z), 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/NLCK42507792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4819f79feac9b6312132e768acf6a35ca81ab852ab75a77c9e5e970a5b2ea34. 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/NLCK42507794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f691a2bb1d1261cb18e204af66dc783be6318ffc230dcf6285ddf479eeccab. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLCK42507795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af08928b507d6da98fdcc19f8f570b7847cc260faec7707533416aa971bbbb8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLCK42340831.