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 0x2b4139fcccfaef33a0fc8ebf58a0afda674ac4a337b4e9b910249d86658d2b3b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05fef48d-8877-45ef-8066-99291565c316.json and https://artists.proofprofile.net/proofs/artist/05fef48d-8877-45ef-8066-99291565c316.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 0x858bc2ff6a92c6314de6189b30f724bda604c42d08551a89aab97c4ba76f0cba. 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/UKEKP1800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9c7c7a492c0296d39ff9dbb44eafd5ec73531c3cefc865d45b3b35ddb2c258. 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/UKEKP1800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362b932a1a7b38a005a6ec69c51c71d8c19b85a12f3ba3de0f4e3b82d79c19d5. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/UKEKP1800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c3bf9272af2f1154443ee151043f3b9fc86ac5569b7b77b95f4d45c0eb9cef. 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/UKEKP1800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba51a9bf1ab69f95bb9b0aba68b0a9a0507485d73dace7ff72af92b8d2105f6. 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/UKEKP1800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ea2856d55baecca6d614af8cf20c83b4d92e1387fa44f1269f2b5cb6c3e9cd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/UKEKP1800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9f217cda7557cdbf0afbd292fe89c9ded70012ddcc648f46b0614c0f5ad525. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBUM72002038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5145de5c660b67d992663a6a86d255267d6c4dd621032f770990faa8ad7db4. 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/UK9KB1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d6b773644cba45f35faab7724884f9a0b0745559fc977f702876f00feccd25. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UK9KB1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106ad7138421a8c4fe06d8d069bc87390c5d6967002081dbf98088deb98b168f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UK9KB1800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10228cca81587cbf14082ee7431e6668f810b2690b427464c813789ef45915e9. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/UK9KB1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079f63f5b424f6f3885dcf098c582c6e773a04d6068e284fa89a373d95d206a7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UK9KB1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2451c67619430c335822ec15675d77e272b76cbaa4fa069802e05775fa1d12. 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/UK9KB1800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e46e744b15f1352990d7035caa40e32d06e16a6b36acf95ef44565ea82058c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/UK9KB1800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7af2147c6232a8781c918e84b8b366fb482071305429f1b392efc24bbbffaf. 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/UK9KB1800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9982411f853b3cca9892d472be5f8e59c24a4fe1aea29969955da89f7bb9b2. 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/UKEKP2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5145de5c660b67d992663a6a86d255267d6c4dd621032f770990faa8ad7db4. 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/UK9KB1800024.