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 0x186b15b9314918e66e2f2f205a84962524e10849a51669ddd0244f7a79248d1f. 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/ae7bcf3c-3319-49ec-a7fe-4d5859ca3518.json and https://artists.proofprofile.net/proofs/artist/ae7bcf3c-3319-49ec-a7fe-4d5859ca3518.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 0x5a932c57976d1f3082b76a083c594ddb823610794a73d9d8cea1f8791d5222f6. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/ATAJ11900272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6515419779b1ec8e241c0d51bb991dd0f49404ed1ddde88aa1b807aecd3ae13b. 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/QM6P42083049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f2fa326fb6cc6596091a8f1932032bdb54fc4e4c0b05ec37cb469c95fe71c0. 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/QM6P42083110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a012c2d6464a7372ca1e4cbdc81c4941726dba5a5407bac12b5218aee6c20b3. 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/QM6P42083114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580cf1bb1315ebaed9dc82258248e3f5b9d4283b38af2a56ad800b82df47926a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QM6P42083119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5923f285e8c91145836082777b7caf7d3fcfcdcb88f9793a6efedadb20059e6. 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/QM6P42083122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0c26ca71855e45ffb0bef34bcaf8b1aace6cacadf1035217a3c6b6895c51f2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM6P42083123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb914e4028bebc6defc09e91f9241014fae9ccc74e0a551f822dda353237df1. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ATAJ12000299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54eea7b95b1aa4134e1a4fb2ffd2796c29ab0e7379c9437e05b12a6a6cda9b0b. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/ATAJ11600150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34478b0a4f6417c6c52acc20ee51b28512f74c06e16d8f50f05fa2f79f2ec7de. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ATAJ11300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e166713948396c6acc4c45b973d720dd3ec621c1cdfef43cabb04807768ecd6. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/ATAJ11400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a4793ad72da4e155d77b346f29f10d8cb1e6f012e88805d4d553619c98d29. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ATAJ12300527.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa285f8e7962b18214407879c483db25aca17e2d0890f1806242d2ac863e19c. 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/ATAJ12400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf82d32736483155b844ebaff9409b73bc434fa663772012cde943610d30b68a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ATAJ12500866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039bb244fdd3c242297812778a0dc4f534a0bbdae9b50128a2fcaf676a45512c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HRA040858152.