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 0xc3ad6a37e98acc483e5cdee448a0026162b75e0eb8ae4c3ff323d72dd7be527d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fab9a468-cfe7-4d27-a60e-36fb20042a6e.json and https://artists.proofprofile.net/proofs/artist/fab9a468-cfe7-4d27-a60e-36fb20042a6e.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 0x9584e9313affed5b18671e6947ccad531f045926bee3462456294daa53615cd5. 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/QZHZ62288356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd62ca192867f820b30500b64b83a664fd6657ac978c8faa40448da9c022fb9c. 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/USUM70740483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28627fab1372594b19cbb1f1082d6d64fa124cddaff8581643fb05f1276fd74b. 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/QMV9W1500106.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5923b8394998638fab6ec79f14a29e173ce4b6af43c94c5873641e6a3f8b297b. 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/USSD11600292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8389b7b7c4cd1d1862657cfdff714d4c637dae96c0a28632e5b79ee07d5e01e0. 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/USDXS1904228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24e381ce27e92ff2fb2e7a32f37ce7f7a7cc302a4feb1c43e932cda3ac7da09. 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/QM4TW1617129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc65f8a580fffa20fe85aa056a014eaa5abcf5d70ff495e486ee841c4361cbf. 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/USUM70763456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8470b02a56bf54af7d591f4035207e77eab8d79b9ade89d5a0b581b87a0e4431. 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/USDXS1600092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0debccbb46ed655e317d5daf1847c0e978f65df30ca1c5a76617c5a6811bce02. 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/TCACF1521509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c375b6fb412dce891b60486f5ca717a0427a86fdbef3383d9cfc046c270a99. 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/QZNJY2347218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea3d474a7edf1c88a42d9aa2ce5766e4fffdf9a0505792c698c1d0219dbc50b. 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/QMFME2163655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728dd1ce859acca815c002c12f637202b388f9282999c3304b9079d7ae1692f1. 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/QM4TX2082810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8ab145192c2ab489771463f065d37c3e7662bf957b564d244385cdd04139b4. 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/RUA1H1716449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761754644bb24ceba73ca3f3f7359048a4c391cd20f8c5627140e1ff10c121aa. 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/USB271600218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b77b21c4f30ee13c19bb200bd7f93e3146c4517ace6012a0c9d4ed06473c527. 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/USB271600226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c97e5b1c4cc25bdb900fe64a7c84b0c1a4ff2c87ca227601f2e1c39908efcd. 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/QZGLM2444108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113010ed8ee1f64ea1732ddd72f2e96f40f05a790c88278f907ff10f7da86d8c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMUCK1450663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca86e4accc897fd98541209de1ecfbc9b3d7886590f740ebf5524d145d100ae6. 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/QM6P41736175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfd84173b406cf379f1555f759e87ce2c6462c7bf228b29c7fe1462f80c3848. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCADN1851863.
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