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 0xac931c556526d2ebf22647915ac2d95c8f7282dded5f82b86563d2f5fa08b2c9. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c8867da-5da7-4022-bd24-46ede26a91ff.json and https://artists.proofprofile.net/proofs/artist/6c8867da-5da7-4022-bd24-46ede26a91ff.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 0xc500f52157459086bef4f859a0105c5a4ad13657de1cf6e721a24990a1141fd2. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USCGH0742958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398704f1c2601a46fa6ca6843d26a48aaae5de07893a2f7187d175d0657f7393. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM91475261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf82bb55baf1da000d144294a55cf2ed4645314eec9b16971680662f2f981d6. 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/USHM91475272.
VMX - 10 Gold Medal Contest Performances
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1b82da735ebb25eebc0bd9628fc5cc2696b09713c05156c1a7756bbb45d321. 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/USHM91475307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c9deba80c2e6959d5521da8e87b6fc62cbe0689e2810eb40ef188f2ebfa27. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USPDG1801370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450526803d563c1db23f584afcbc341b20fff24baf370dfee192316b7916ba72. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USPDG1801470.
Carpenters Medley: Sing! / Close to You / We've Only Just Begun / Top of the World / For All We Know
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76690738b1f15a773be70ff4d98483f29146fd36b69e38e035bd39ad972c8603. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USPDG1801670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cbb65a746b54732ed7ff7e8a9edc4290b08590a38e0033cd909a37c7ec7c44. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USPDG1802470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff1f4a5394cfa85e904a6ec8de77e6a963e82b531b61029d02ea813a8cfbf0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USPDG1802570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe979e6dd08792e187d41c0be3daefc223eb488560ba4ce08a950ac0281fd9459. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USPDG1802670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2e6abc6b72cb61f01ca67f4e9034b1ac3248a7788cda8c06a0a95c0155baa6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USPDG1802770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca9801a18510e2bd682858986dccb134d6e57123eb2926d2b88b400346a6876. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USPDG1802870.