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 0x3f622e00914fa49b5fd89d13be02909e5b83cdbaa86157824d9f7d4c87301b92. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17260423-e51c-48f5-8294-9e879ddd0864.json and https://artists.proofprofile.net/proofs/artist/17260423-e51c-48f5-8294-9e879ddd0864.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 0xa64dd177ffa61b8261eb717451bb54596c8720bb62f1c5be67a471a83f62b13a. 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/DGA062303871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebabfcf951ddbab8c8af2a4542e91e620007cd91bbaac236e45434a0e21a9db0. 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/DGA062303872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1933627f5de1ce808fecc6c9b083e464f55b5799375a13627a025ba1564afa3. 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/DGA062303873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b93081dae961fe5b68588caba3f116bd8e15c68ad632947031e79a8b26d39d9. 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/DGA062303874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70c598ef1537587a4aedf713bc9eab4d5e2f7f2b76b8ba3375a0328dd266788. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:19:37Z), 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/DGA062303875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad3865d5c0025b602312a8a27e8a0a3d33f04b2078d8d7c7972d7cf88a7a571. 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/DGA062303877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bafdf2e3be1ac92e4bf3097a664e7728f35f2fbea08fc837ad32c1e5db4e08. 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/ITMDU2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb14048e9e8feff2713795b45df054ae440b941d7fed75aaf0783b64e4207f0. 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/ITMDU2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218bd4e485f1213d21c30cc6ec9fc8e37100a8ee6120ccfaa6535ebddd17b729. 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/ITMDU2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a763df95b689cb839b9d55658564181e706b75b0854ee6de9732707b1c56c04. 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/ITMDU2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70bcd3192a7683be0391d0b356b2e9443eb4ab0d74f0cc95c8369dc5c8f196e. 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/ITMDU2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7137f0a50a0ccda2323e7bf588f0d0c0b9b24cc42ad81a1b8a167e9f708e4716. 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/ITMDU2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe311b1984df473683ad168930e9becca74968861c7573af5113ccdb2df0cfbd. 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/ITMDU2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cd1df6dd53e1953b731d05c4595f006460bc7a6c1da9f79f638ccf536d703f. 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/ITMDU2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069080442dd6cac407c7ef168bb04edc0c7191e25d56c703dddc21e65397a77c. 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/ITMDU2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aed2e05b8f04b78a53770ed8223182b96d18fbd51e263364178d622ffb65d36. 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/USX9P2482791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf448f6a3a87e7e96f917ee34cdf86f1cb2779dcb8325696fbbaa0639b04ffce4. 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/USX9P2482793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d68616de3ae2fbecb65627e6ddbb7b8c21c2e18ce65bbf0ba226675df8d447. 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/USX9P2482794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6683f500a2775be59f7a19e6c9904a62339f31c7c645fcbbe43d829f41b4361f. 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/USX9P2482795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7905ff94403f8bb41cebafbb7bae483eb34e5501140cb5f02ac25eeee960b921. 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/USX9P2482796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ec6fddc7e313862617675f21374425a418834af5b6c0e94a59cbfece3520e0. 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/USX9P2482797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bc80723de4045b0a0a2470781342e8f6319fd9a6978e8c639a8a73f202562b. 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/QZTB42237785.