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 0xca7692a6e49dbf260cfcd4eb9d5cec2b36191dca1ab923bc97fed8d9acf56ad2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fb9df97-5b33-4e33-9487-0c3ad2fd7f7c.json and https://artists.proofprofile.net/proofs/artist/7fb9df97-5b33-4e33-9487-0c3ad2fd7f7c.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 0xfd4a7d5a472de9ca994f751adcf18abf0746691a9bfc5063eee7a2dea9c0138c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM6N22352329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e041403b9a6ce074f6bfbf90772a272debb7645655fc1e37b52acca248ee79e. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZPLS2319595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a61ed51928d55222260bc1e3093cf4026aa95d1d53e58e5320e7cd9bc18d104. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAW2305732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42868079603608e03337bf793e81c225933808adf03e2df9e8821b531be9f96. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFN2394770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee2c4adc45ec454a0d15877fce7c13a3fdc8673eec27221f7acb0813b6d1962. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES92465424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5136a1048d47d7c27fc575f6e0c7490368f6c9bb47abb9b061e9f16912a18c1a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN52490422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741ba09ca5705ef7aca7c44ed87265978da744bb997a645604e1d7402f4933e2. 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/QZHN72403109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0906268d1f50319723f0a96e0b17c7d7e0de4a3c6dae8670603d5b7148f8ae88. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFR2489887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2bf97bd50e2027c01195620680626185a488ce1c527d66ba65525a22fa6c9a. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:44:19Z), 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/QZFZ22507159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c79d9b6663736350eaf6c96150bf90823b3b80a6ddebc5a9300f8dd7c18cb. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZHN42587936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabacd230f9a9c7f958e898b7c8d6252c3472a3d3d71d94aa68d2778646315381. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN92533867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31aa9a1c01f1d81ba5924ffc52279e05d58bc5b0a2be21e0405e404cbf916c0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZHNB2554667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0112056592b9998eef01563400289339d72c365f36f1b582dad32f9c6cc6b6c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6L2573922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cc66897b92a11ea389ffbe85832dacaebcadc2634420ce4c44bc119a8b62d3. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:24Z), 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/QZTAZ2597330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd509a520163d907c30d5a3b9820f6f3f182046b720255c81f1b4390bdd1140b3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBA2545260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bd073582daf7a9efe5cf0a31d81b200435fdc9c899e7f0bb7deab5013de014. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:41Z), 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/QZTBA2545262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebf85b1bac5c4b869033257de8d55a4da46d2a6bab2df535c4c8f44432e0883. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT5M32546639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144c020bdd16a8fa153af234b68ee799b47806d19c2231ab8c0b809bbf2b1ab4. 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/QZPJ32383163.