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 0xaeb3252eec2b5bc2d6ca723aeb7b29acaf99529b10845559086cae1617395fc6. 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/2e60a811-23bb-48c4-82f7-320b2f5a53a3.json and https://artists.proofprofile.net/proofs/artist/2e60a811-23bb-48c4-82f7-320b2f5a53a3.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 0xe90415796124de45941783d2b1acc8e615e74856b408498ac4a0c98a96f2b1da. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FR9W12307517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1911a9c2bf0be309ab3104b74fa7fce2fd419ffdfb9d65762b6d3f5cdc5451. 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/QZHN52288818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31224e68a16efdf85c397318e05469bedc4f849a3c998eb254ace2c862a8acb. 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/QZHN52288819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6caf50adaf5df92bb79669cb2d891f88baf1ca678a0c67d7bc1da3536529e4f. 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/QZHN52288820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2249091c7e9b2b590fa9b7445d0e260e95ee8b103a8f34a01a18f2388b03188. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN52288821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f68259aa3d6f374a9671d49e4cabd328b85029c3a70e27fc264a6a527298fb. 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/QZHN52288822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1561454b01454fcd9d47fcaf69cacf27f04eaf39471848596bb015f3836c28. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZHN52288823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638df68b789e496f2745b4e5836f808af75427a86b9fcbbe9faaf7b384e42f35. 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/QZHN52288824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a80562422a942796d996eb3c649d3c31e103566a91b3f1b01ba9ee165f0845. 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/FXR642300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca10027c3b1f159475b5cfb2b7fa7c372a701fa06039e9ff8c0760d85749eef8. 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/FR9W12309686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef8d15c8c8baff7c4a108aed164abb74d3685aebb9ba4e0d1f972bc8bd1e65. 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/QZNWR2193666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297bb754dd258259115083c6287986950f2ff5bf97392025f1bd24bdabb84521. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/FR0NT0000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196eae301c4566a723e03f2d7dfb3800a03a7fc0ad3dcfba7972e3b71345fa32. 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/QZNWR2010733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbda63cff9bc383acd1134d0de7ed6727e7f788dee871e950ad821bb2931d27. 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/QZNWR2010735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c706194fb75b533a9b5c9e69728768cd403ed506ee1cf1638a8c160d918c7e7. 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/QZNWR2010736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90415796124de45941783d2b1acc8e615e74856b408498ac4a0c98a96f2b1da. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12307517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e08d3fb57389a8bd8d07df4c140fe8f07f92b7d6e2d3bdf65bb54f1ab51efb. 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/QZNWY2203965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6051f5023e462545fbf8acc66f82a962e2482047fcb637e47611b18e72ae87e. 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/QZK6L2121247.