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 0xd2beb5a96c263f96c7ef0d6ecfe530702547e1ae2be244545236fe7c8738108c. 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/2149fc6a-2203-46cb-862d-c5a9c96239de.json and https://artists.proofprofile.net/proofs/artist/2149fc6a-2203-46cb-862d-c5a9c96239de.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 0x54a76fdfbcc23373f61cbb30d8c7cc668f99a0c89971fdd57e413a8432d94f08. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/GBPFW0700752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b049e6f8328fca6650f79bb72bb5da48182ff87312f40d681cabc3ea86b105. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USRMK1300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716e48aa234b05910efd41cc3f48886f4c4eb21f81b008c8650a5bfc82f0a694. 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/USWL19900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97143394d9200833a0edbe39544b9225830d0962f9d45b606a767778074c350a. 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/USWL10100688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25edcb9f64dd729e2962f3f9faa6c5245460a1d03938ee1916afdab38cc718fd. 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/USWL10100692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d028e5c3cb077fe52b0605ad0d8f2d05c865e833d12be41b1b54cf77ef1286c. 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/USWL10100693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97143394d9200833a0edbe39544b9225830d0962f9d45b606a767778074c350a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USWL10100688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd15e7e0a6cd6418c8fb6de36081417d33a72260aacf404b59b8e2bcdd0deb3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USWL10100689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7597d171c2fedf691a5a80a0477d483ef592cdefff1d74768e8514042ac0011d. 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/USWL10100690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25edcb9f64dd729e2962f3f9faa6c5245460a1d03938ee1916afdab38cc718fd. 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/USWL10100692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc19f1a121aefdcafc7644855f7f98afd3164e8629130ebe4bfd65c0d658c609. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USWL10100695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb349dc61f6f2dfcda9a0eaec00dacdd4b834e9e40bff27cf657b60414dbc00. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USWL10100698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391828831271973e7199bc2e7ec0eea7505819e6fe72e481599aa344e539d68f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USWL10100713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8992478862e5d70339c2a989572ddb8ebb48baed1c6d9b22847b15ceae901cde. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USWL10100714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4590d69ea8400fe65edeca28e6f5cbfde4c58711f6b7cc0d336dcab7111bb50f. 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/USWL10100715.