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 0xc6810aba45c76db0b5195b9292fc0c7daed1c094c3165f1a6dbc67fa66873c6a. 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/e87cf984-c1dd-4164-b431-b42ac8a62c89.json and https://artists.proofprofile.net/proofs/artist/e87cf984-c1dd-4164-b431-b42ac8a62c89.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 0xba63f675f07cfc16dd381797778e265ec622a25c5a62fab2ea5151e9ecbc0afc. Chain 2 (Bitcoin): anchored in block 957596 (2026-07-11T18:43:56Z), 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/INS232016102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54448326c6a45e82715918051203a8f7f43b41b97c55f1eb89a4fbcce4a465d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/INS232016103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa234e70486ec0e3abccb730c68659e638eb83e073668974278e670fa915f8c40. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/INS232016104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bacd9f66251a09b72a63f43ccd9a9dc13ff85214e95fdbbae548ac2ee62c8b4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/INS232016105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4103aa49dee40cf73f4641bf141af140ae2e61c333e715b5f954adeffb560cb6. 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/INS232016108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5eca8bb56631dd167a58d8d303a09e5d132f09f6c7e0a23b39137fb4b9b496c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INS232102987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af532f3b05a87fe74bb9cda25a699ccf9a18d4e4b272dd114ebfeaaeffdb72f. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/INS232103633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe244daca561a7708a43d2bca09b557bbe010f916fca005b72a6b91210bc4efe6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/INS232103634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae733ade0951574f12f91cba507cb97d8dd10bd5fdc2a1b5baae1bd6f56c644. 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/INS232103864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fc0d52d31237e1b626d57a7c0cce24e2df906e45515b71ad059bca83c60bcc. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/INS232103865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcffa97ded83a9e086ac96dab058fb66ea8dc6da475912015b2882ac661ad330. 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/INS232104072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d288f2924865b896ff4011678cae0d93f2eea7b49c4e5f9ed06b1d1e302a3d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/INS232104073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f720c87fa2c8f0f9225c35d76de0df4ca4a6eb3deffdf52ac5e47b99aaa3db1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INV582300508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a1629000ddc7087708aabe0d698f7639f62e746ab35ad30a2b906488b105ec. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/INV582217387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7f1a89ed3920b0f4ba74ceaeab5c0f2e4bb1d0bd833bcea788dcf10524eafd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/INV582217388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18b6998ae3fb40a937ab07d68203a481bba1458b510cb4c2257855716f81ec0. 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/INV582217347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0fbdaa04ef870f2ee15cf1add11143b80329f368a59bb158b71807c729ab3f. 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/INV582217605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19e8f87dfd2298a1a51a424d9ceee871911b0709b72e916a5dc502945fec5bb. 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/INV582217602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3123b1962169507e5f286f39c949cf3605dd5fcbc880336b91ae70235ef06e48. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/INV582301203.