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 0xe881435d364f0925610a353f5e133166e39bcc853730955c2ea2bde6d854fc71. 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/e250d68b-c3f1-46e2-8136-473f9605a270.json and https://artists.proofprofile.net/proofs/artist/e250d68b-c3f1-46e2-8136-473f9605a270.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 0x97c76201095499e8ff8f3c7b8525337eeb74ff227ae41bbc793b5b694867cb3e. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/DEZC62100864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474cfefbdab71b6a2721b96acdc53ae66e27b8565080d71462be6f2ff6617773. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZC62382067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990ca25e9221aee66eb66217f4b06aca5a05a8f06b27ce4291742196120676a5. 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/FRS182122612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a566dbbf9448828ac98fd396f2ea96d66bef5b420ea2b383ce57767b5ce192e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/FR10S2238717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb86fa0a12490672bbe2da95e47a379a69d015fb3cbe5efcd4fa2285115c7f71. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR59R2268641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2a92f81cb78693d5a83aac12b8c6132d488b2398c62938026aae95da6b600f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DGA072223499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c211d6f90191a88d0239f67ad2fa2f9c4abdd44ee8d93c2c4e32d8d751b82d. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/DGA072282131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680d95a90c153b883af6d0e0b38f6f95511f2b69da16e2430f86c70283e0ad06. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/RUA1D2327121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421b5beb3fa2dd5c5b192fac5f8ce3e2f40349a6731d9fd3845319de563863f6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/RUA1D2376688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0471d58efd6f438ee91e8629df2c9a2623117db2608f73de8125c1a5c71b1cf9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/RUA1D2471446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29525a1aae9a722b6fbd451cfa81d0908ee3c5e5548473edb8b0558441ec7f18. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/RUA1D2485580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879330285c25136fb39fb328eb84335e6a3720684c0019bb7e50287597029ec5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/RUAGT2439074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cdbb5f1219370e857854810c5981b4e660b6aa1468f585a9cc658499dca10b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/RUAH62425316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f5d20903092f452c3b48b0e46da6b15f0c1b417196ce8b42f9dd630dcce3f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/RUA1D2515341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25781e1ee1695b6917ca0d058c0dd91522f6c2529ece964a9b15002552e6ea6. 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/RUA1D2553922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c44fbf64e9d4fabc072c02c1297138936ee0c21c13bda64e097548342d382c2. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/RUAGT2576265.