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 0xd01695aa69aefabfe3985affb9947d5d7c9d0b44afadab7a5756a2226153a659. 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/28658b09-9cca-4e5e-bb8c-f4c6c6aecebb.json and https://artists.proofprofile.net/proofs/artist/28658b09-9cca-4e5e-bb8c-f4c6c6aecebb.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 0x15c761f0451e805ee58c5baca9532da615f1b3998fb9a8866b660f238768f954. 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/IEBBA2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71506a1f0886aac6285da2ef90246b207a1152ca4433b71dc83e9162dbc8329c. 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/IEBBA2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a4c6851ef26d2b87999fe2626cda39f70979328023b1094944ab802420ea48. 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/IEBBA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf27846208345709bed64889c4c6dc4c278f24a7de2699e99a91671e6c3869a. 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/IEBBA2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5011035aa0d270c7dee07f14d6e3b4b628ea9b466b18855d4e44778d070d230c. 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/IEBBA2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28cab83ab1f2bc1ffcad9069390d72161a340b9d873777bceb539cb859e522. 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/IEBBA2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944c5e4d39a8ae37c79692f0e075db108f1a533ddb97b1d8cea29a23179553dc. 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/IEBBA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f47c1c178db6a8a24ad8c1371b9d43fcce2dc577dbbf9a3dcf73a3516e72804. 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/IEBBA2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44947480d2a4f1c23f8fbb08f5afaa835fed54c303410e59f73c8b2451e24402. 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/QZK6M2193601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a9a22b7a9fd80937596b99d416e872357b9acd6ce94037c568b574ccaaf5c8. 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/QZK6M2193602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab79d1a1c48816fc1c09e2b62b1d4f67463fdf6b9db6f55d4600b4b6755a0695. 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/QZK6M2193603.
The Great, Gallant, Brave and Bold Edward Fitzgerald
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce113139fbad09eec6d7c21269e2ea3284100515dfe1af015a0fb88fab6a1497. 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/QZK6M2193604.
A Farewell To English (Michael Hartnett)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b2f0d9e55f911d650d5b55e8b635bacdc82a3a7a8c23278debce313ba9c5b3. 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/QZK6M2193606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ec8f867bb2bcf59a84399384f1a3f80bc7a23586fc870bb7e704126a74dc15. 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/QZK6M2193607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56eeb4c86c361b965cae67c7edd25e3477ac6c905618caa8cfec7ef739237703. 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/QZPLR2006408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099f0a16c77ec207bd1606d5c188184ed55bbd9e27635f9bcc02ac7273b80d11. 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/QZTAX2470405.