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 0x4af90d1c813754c8ecc86dfb53d6ccce2bdc9518c9a366d07587baedfa10e6ae. 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/79c5079d-2aed-454b-99c4-d0b768ae7b96.json and https://artists.proofprofile.net/proofs/artist/79c5079d-2aed-454b-99c4-d0b768ae7b96.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 0x3f30d4cca42a13440eb53ce1e7e285e7ea2cf343bc4e208d0cda13390051c096. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCABH1278717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d533cee5b9fbe2e4c9fe20c9f7be6cbd64511784045b05a1ce9ba06f5c7237. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/CA6D21000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902ffaaccd994ab85022d0a94efa50fec52606fcaf202a5a9b743a4ea34bcf84. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA6D21000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a81ba692633bdedcc4af3a67aa9a7e6a7cd0aa085b6efc7d11c4920380f2ac9. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/CA6D21001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a26ddd8e2c52f4a19d2db5eb055ac0eb39224ceda12893115c36615d29eaf55. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZ4JJ1645551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a928eb02e7224e5eb458536a49ca9f1b0cc6b0e75eac3dd5fa6c4948420094. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZANL1796572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3b57ce5adc77836383dd9264763e06e2227c0b2974e70a10593cff984ac717. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZARB1884601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34672a804749708a8708f494c3b40915594700f305872b403ba2d0324d4aa8eb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6K2190770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf37986e35558263d14711929fba739e4ee49fd5cf5217a2072c7348a4310bfa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYZ2487486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7d457205be2ec7218b0fce1ae84c96be8ffa132ae21cd0428996e98444c4ca. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABG1275692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dd0a63da3c19ef9e11e49ebf3560a0799af125c9826f3ddc887a0df4f63800. 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/TCABG1275667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129372c17a368ffee01344b6e0b74ae9b6a92d23b210b8d07bb0ad7e4ccbe5c7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCABL1374337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae614fcc97836226d97335abf9dbf2f2f84483920daf6ac72c293ba21e7e3f5. 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/CA6D21000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e85c8149a9133a08c028fe22c15a3c536d43dc2db63da7b631540180f5b4d13. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/US3GD1401600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae614fcc97836226d97335abf9dbf2f2f84483920daf6ac72c293ba21e7e3f5. 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/CA6D21000178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039de5e07314a4f7c596b7feaef1cf2e436800f1271e1a74f22dd6eeac6acdf1. 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/TCABG1275634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dd0a63da3c19ef9e11e49ebf3560a0799af125c9826f3ddc887a0df4f63800. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCABG1275667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039de5e07314a4f7c596b7feaef1cf2e436800f1271e1a74f22dd6eeac6acdf1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCABG1275634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7d457205be2ec7218b0fce1ae84c96be8ffa132ae21cd0428996e98444c4ca. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCABG1275692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30129cccdee3c267e5268ce56223655433f20254aeeac65f6f4a18568b809ca9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CA6D21000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f30d4cca42a13440eb53ce1e7e285e7ea2cf343bc4e208d0cda13390051c096. 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/TCABH1278717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129372c17a368ffee01344b6e0b74ae9b6a92d23b210b8d07bb0ad7e4ccbe5c7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TCABL1374337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a81ba692633bdedcc4af3a67aa9a7e6a7cd0aa085b6efc7d11c4920380f2ac9. 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/CA6D21001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0bd1592dc6cf025d04fbaf615bce6992301e00f71e1679ddfc5cc3c84ca7a7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CA6D21000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d533cee5b9fbe2e4c9fe20c9f7be6cbd64511784045b05a1ce9ba06f5c7237. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA6D21000080.