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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9f8338a37886a292a8d44e416d375e11bcb1549071ac1ba78c2569ea1ae0be. 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/bbba4c68-9707-4174-99dd-ba87aaa0e65e.json and https://artists.proofprofile.net/proofs/artist/bbba4c68-9707-4174-99dd-ba87aaa0e65e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500ae8f3d4993d79037fb3ced2d5c10752cf690d1073e81d29b2c333fe07555. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/HRA048315093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1792ba074167c037a77fd02cfe0232e2cbd0a07e641ed29f0330078316958b25. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/HRA048315095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b342bfcfaa0c49550fcdbeb303b12fadff8e3297706d5076915e5557ab1f79. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/HRA048315098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f35ee47f4cdccb152b4bf2b56a7cef783f00dcaa1ac9b623998321c9992a783. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HRA048531153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae2a3995d90e29654eaa7a06719de8bac2dc2b4a698efac513ea06691385d58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HRA048918517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38666e6ced8d11db478d5e1e244d88bd6c87ec73726c56da749718324a537787. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HRA048918519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf432b9d8d9c5cf885522df1c9a695a365edb815952ad48ff8b65c7b1775f7f38. 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/HRA048918522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76af17f7683543706124ee6e872b4255f48e3c3f3f2233fc34162fab7d8c7f7e. 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/HRA048918524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999fd381ef63aa663ee84992b08b48aaa2faa49071f5b865e88300950eee9680. 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/HRA048918525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdb4fb626f1b6c87dcac6266f6b683ee5497a443430ef4406a552553d1c2a28. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HRA048918276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999fd381ef63aa663ee84992b08b48aaa2faa49071f5b865e88300950eee9680. 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/HRA048918525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e04a8e5457689d407da35364b30f584eafffa7299864ae6d55ac696621b003. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HRA048315100.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eb2edbe06c22be8d85571cbf44442176fa87ccca79348066bbf594b3577466. 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/HRA048144439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28413516fa56f25f6ebf3fbbb24006608a890224d1d430b291caaaea48851be6. 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/HRA048135253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a54dac46fa62f1b61531050a615055c86975296a8ac7c2e5d6b598d9e061b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HRA048229936.