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 0x9ec6ce4ae014ca9b209da45ac485c4c1d8c70c2a9edd572b4ad9b7f36dc87d36. 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/609cfcff-9c75-4c8d-bd55-1e3bdae6dea4.json and https://artists.proofprofile.net/proofs/artist/609cfcff-9c75-4c8d-bd55-1e3bdae6dea4.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 0x032ca6529021f50c1bb709ea27469c92e93eca1b71f7104426daae8d24c0501b. 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/RUA1D2006595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069c651136b8bf6da447ee6977eae4940aa7e14f0fadea8cfd2f8684dbc072ab. 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/QMFMG2353108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd4c656a7e9f45b8969686391f47a8f9d8a661d78cba8e2e22c27c493c5efff. 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/QMFMG2353113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9812a7e1a5a00f0c57dd8b0c211513220d1780f1e8f315eb2809e2726fae9825. 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/QMFMG2353117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc55081483b8655382463045f1c2f89fd1c1b9487cec971b543def4a174e626. 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/QMFMG2353118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a76c73f13751e2340c0140a5f8149fea04d0ce02d9f0a13ccfaaf45500fb5. 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/QMFMG2353119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd09a0eeaf436859c6b83bd20213dc06109c189c03455cb5672b7dbdfa68644. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QMFMG2353120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375f61ba57292e2bd8c496cb6228306fd8896572956d7a8eeecf08269db93ae5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMFMG2353121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003c9bf817ac0f11f97ad302cf5e0fe4f6b9f50de4e129f2db0ed643fb95a69c. 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/QMFMG2353122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabeeabdd84e05851ab171769596dce01de2ed3af5df0b191f2891c4b60c436fa. 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/QMFMG2353123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cf613524a06177dde90188a3f42abf67a400e1b1a9c7feb55be44f429d0212. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QMFMG2353124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d5f1ce949b26ab4e271d5716295eac61be05adf8ded52f90daca34815dcd61. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QMFMG2353125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23125d5f904d49e5a57757cfa574cebaf51ac8426fcaab46a4052e3ef1c58eb1. Chain 2 (Bitcoin): anchored in block 957868 (2026-07-13T14:56:55Z), 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/QMFMG2353126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f8109e1891a435f83a1a9ebf441846b22b46156146ff96d504dc027d790e49. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QMFMG2353127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53963afa3cbc7b8f632944c56cc013060526cb6153a7a21345cb07315a4979f9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QMFMG2353128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea94d791c48248b548ad2159522958a6e9f0d4d95c39d354fda1d3c4e12c910. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM7282426815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db8c6915f45c4d1c187c00371a79e63a6c288dbda6f2805e2bebc3bfe7efa9f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMDA72581049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aaff1a468f7bb412423e5ad03fbc4ec40b5769f3f6cb33f80ef286848146e25. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM24S2206193.