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 0xcb17f4fdbf1f33699092763a235918cebfb68887b118d4f41665cf0e1f989a89. 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/0f0342f7-f1e2-4c0c-a420-d56492d8fe40.json and https://artists.proofprofile.net/proofs/artist/0f0342f7-f1e2-4c0c-a420-d56492d8fe40.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 0xf459575b1e14557d6ced7c873fdff5fe50350ca931a0fca22a0e749cd2f75374. 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/FIPEB2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8494f8151bdd42dbf9539a5204c9f02d0aa337af2126f2b3b4cd7b865591b021. 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/FIPEB2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a12e82489eda5bee1bf1fc2acc479c3ab60d5014fe2acc92f3772bd15b0044. 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/FIPEB2300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30397d2a37fd23478c662a129fd1f598d0e846bfe743612033d1b419db27f4ae. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIPEB2300132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ebbe02532d872a379936782afdcdd281a32bbc3d9a26cc3532a30029609a8a. 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/FIPEB2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5915ecfd5def346f7d3611bb48a97121eb17448b48681da52d9a53b97060b7f. 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/FIPEB2200158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8631266506a86b56ea623a3d752d73906e8e2cfec1ebfdfea736461ee933d11a. 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/FIPEB2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9d1ed09a97c21441f6f4a983d356b2bd7a6ede84e82a124f93d2fd8eca1f0b. 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/FIPEB2300133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b5a90de9efc91a5f64052a27ff0cade6ca4fe45a9214e7887d9b5b2c8fd475. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIPEB2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a725bbed850d7bb8b2a93df236f4dbda989cf079d429c21369a0ca82f469ab3. 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/FIPEB2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147d603b74af2e911b7ef5db509e85780715a99b0472450bd794cecc165cba9b. 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/FIPEB2300134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2b35a95b05d1a95a61028cd8f5b71f125e5debf6e2d908f44302b479dc2eec. 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/FIPEB2300089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de5f4453ce0ac3c680a9e81795384ca1bb2d1a746097170295c3436c5be646b. 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/FIBAR2300664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5255bcc2633dcd2f09b2e21f58b8aaa9f6e018eaf1fdb22dd4bde0374a0717. 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/FIBAR2300666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cb904223a15ef92ed68772cff822bc5fc27cd18e44d53e008bc508ed8062e0. 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/FIPEB1900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db09ad4c77032c958f46cef3164382a985eaa6674a1f253e24940a1f75e829b. 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/FIPEB2200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7b133e34374b12d2713e452c8390fe8bf89c4836aa6dfb696150c1041a1efe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FIBAR2200257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009d45073cac6e61bef21b44d03b62ff49454c2021da10fb251d28d15ab0fd89. 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/QZFYX1949096.