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 0x968203306fb050dee8cb972cb27ff9a4191f761682a56a5b01f3beac33ea2eea. 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/53f49076-24b1-4c62-ab97-e47aa776ef70.json and https://artists.proofprofile.net/proofs/artist/53f49076-24b1-4c62-ab97-e47aa776ef70.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 0x1cf8f4e188825e569e719cf6de14f641a09a5a83828e89dcd84c2cd1a7f621cc. 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/SE5XG2256101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498552a2977aaa186533b8e85fa3b09b2dac194e1d2d4923d7128ec59bc449b7. 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/FR9W12305914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1d72ccddbb04253c472e06ac00ce442b1c0b39ad02d60d52bc40e8c042f13c. 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/FR9W12318249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaef89fa27f7c91df344cf780dc17dd50c2e075d25ddbf3a647758723cc4f05b. 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/QZWDD2339887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ae188cfc7eea5ccbb4727574cec89c5f1bf82ff9f1091025430237887713b7. 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/QZZ8B2340881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470adaf70c7c173a5e400971b8c6da87277edb1e33e0bccea42f85b39a1b644a. 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/GX8LE2213272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d93f94093abdc8315ae019e47aeb2f0d7bb308d0f663319903d802cc7193e4. 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/QZK6K2498704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770bdcd9f8d342d40fcf3b75887c824a5455e901559247667d1cb4ec664a227b. 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/QZHN62453579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0bffc518a3e587a95f2c5afb2673d9ce6e1fbab5abf287aef42872a9b9c11a. 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/DEHK92108994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dffe8978ae0aaa0efe6f6ec7613d49b2222a2ab1c18dc8d70d3d51895eb8fb. 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/QZES62407475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fab8b476dd35b0ac6c08c888d1c7e001b62ef9700335fdd884120f9c4b69c07. 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/QZDA62415249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccbe7b1f594cd280f0c5a841fc3479dca0aef6d74c9b71d76eba1703b8da4d9. 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/QZFZ32415630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82a555b60534b456a07eda85a2b4ee9751dc348d0be5f4167152b12e01ea672. 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/QZTAW2303486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a410f4bf3e2c68ca05c5049032c4a2dee7639e790fb4cf9600ac0bcd0c74290. 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/NLZ542300688.
Where The Sun Goes Down (with Hard Lights)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204e0a6f326641d39c378905986fd7a8fed296c533baca9beac34ce74547d3d9. 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/FR9W12303093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949489da485aa8c81b614475d0a166a798c91c4db57a56d38156b2dcf3e1abd1. 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/SE5XG2259001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c035b5fd61ced3b21a8a162eea47873ef2f4380149066b19e0b555f8457188. 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/SE5XG2253701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbba05a9c0b981aaaaba0d1035847b39d8c2c0bd8e6527d7711ad7b1be83833. 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/QZHN72541896.