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 0x68a9f457802b99d0cddc51bf51dbb2574e74d597b06726d19f4612d83fbfb0e8. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66051aaa-c1bd-4f9b-b67f-33c087637038.json and https://artists.proofprofile.net/proofs/artist/66051aaa-c1bd-4f9b-b67f-33c087637038.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 0x83b645b7f6bdcb14773cf5be5e264be45a81b240175716588a4af54e8e8d2b3d. 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/FR9W12010756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53500efb7d323a1c4ff7b387075d3e5092357b75c52549590e1a19d2c917adcd. 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/FR9W12010757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3c7986f122c9d58cba916fca03937ad0238dda12dbfeb69b35e41020711a26. 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/FRIDO1911303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721580bcdd5022ec478441cf8ab04a8ca640ceda56b26dedeb9ea890b6102ba. 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/FRIDO2010736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8477c8c6bbbbc3bdc60fe241c9374bde5148da83bc7488c3ab8847538aec7e. 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/FR9W12010759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010e907f921eb89be927cba9732a86cad80a321f1104bb4edd4a218cd42fe181. 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/FR9W12010760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc70f7913910458f0b08bdd5ae877a3cf6dea6d61f17c65544b202300d4d8c9. 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/FRIDO2111481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010e907f921eb89be927cba9732a86cad80a321f1104bb4edd4a218cd42fe181. 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/FR9W12010760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721580bcdd5022ec478441cf8ab04a8ca640ceda56b26dedeb9ea890b6102ba. 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/FRIDO2010736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3c7986f122c9d58cba916fca03937ad0238dda12dbfeb69b35e41020711a26. 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/FRIDO1911303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92055acf1f723a036c2c11a5c6215c22057f281229836ccb08018712b2bee6b6. 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/FR9W12209492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13542b4fdc1ccbd5f7f526f81a8f92858846f4334388ac9018d7de5d0a3e8c57. 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/FR9W12209495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c84fbea8b4e1d4b64b35d9aaac483a48277250be0e1afdff412cbffae04caba. 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/FR9W12209497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e74eaabdb614940382ee343e75941006fff7bf00a10c1c35caf933820524083. 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/FR9W12209498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f75e57c2cb5cbf2f10d1da4e3a0471674b2313ac7440902dbc796ba8784a0d. 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/FR9W12209503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b17d11120627d75e93407049596ed795999da99a665811f8fd2d87f35fffb04. 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/BEEN92200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf614e902fe914d9e835a899fc895d4a7ae67c3cc3eb35b6324d655f3c22a631f. 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/BEEN92200009.