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 0x1121cd5bb9a16a8b05ffb83b88a9af13e88df5500fbe6ca5bc17657a858ec134. 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/acf19a53-7d65-48f9-b84a-e6a69ef100a2.json and https://artists.proofprofile.net/proofs/artist/acf19a53-7d65-48f9-b84a-e6a69ef100a2.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 0xc8936871ed50c74eddc479778ddfbd8b87e22c44f087b264de8e13d67e092374. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DEUM71503329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3636e5b9e4ff94743161d22a7a37c5fcfafe5bf17ca122fc16f03c1d772f6793. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEUM71604159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c33d45bbcdd23e6a7ea587b8c0dac92fa55037ee4da3d5c570b22b6a217a93d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEUM71900433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4451e6f99dc563c9afd2b3e7d2108746e86a6610b2bd9189e69556a547a3367c. 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/DEUM71905462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c221449d6b68527b7217eb7849c540cb7ea52801c0dc9abeca6bf68f4351368. 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/DEUM71905465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599f8b2726e0b794129dda5edd3ff9f686e2af833b57e2b0b4d986ca21d568cf. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEUM72000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76723d519995693410e701f593c4e75ab90aee700d7841943195532fb161a56a. 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/DEUM72117973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3e78e32c0dd3ddcff4b2b983d72e07281f8d78bcc0dbb0ee14ca4454d16b03. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/DEUM72205377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bbedcc1724a83f9a0189c687baec2d98e1fd69d8e10efcfdb5cc75bb3963ed. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/DEUM72205941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fef54eaac24a43153bf7521ba478264361e446d15ba393da5a0b118ecf2822. 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/DEUM72205944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06da55bde28c895b62c9e922739d1822ffd9344ddba5f429e4161df1b96da33. 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/DEUM72116672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d23cbfa396c857040c49da80521cee85c6f4055cb9d2a56649988e069aa538d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEUM72409320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3343e8874638d59cf0d770465b5523c607bac20f269a9484a30987ee4eb22416. 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/DEUM72406647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2965c026f4b8b3f7319daf535765f69f510eb392195dd7738f927f9e0e04338e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEUM72311358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ab1a19e212e276e2b112071bd8972edef8e38c778e521faafceeb9d2b9cad8. 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/DEUM72507241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667a3b06f47351a6057026c40de12d1ba6f0152ce0f6e6fac2b2f17e192e7f46. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DEUM72507243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2965c026f4b8b3f7319daf535765f69f510eb392195dd7738f927f9e0e04338e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUM72311358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b6704de17f2d9099c812c5f3ebf4e06cc0cf19e8743a429a22efebef54e42c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUM72005649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76723d519995693410e701f593c4e75ab90aee700d7841943195532fb161a56a. 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/DEUM72117973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df66f3e073b8bedcb4679a999021d3bc7c52893fee960a54afa38751dfc76d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM72408694.