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 0xd7e97ace5235a0b61e8011ba8a202db6c2d16d6f7deb987127930be0077a287f. 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/240e925e-e7a0-457c-a1eb-a61e8ecfba96.json and https://artists.proofprofile.net/proofs/artist/240e925e-e7a0-457c-a1eb-a61e8ecfba96.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 0xf0dfa818ea94b6d29653b0d24cd26f765fa416cad1aadd7edb873326ef7505de. 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/FRX202224478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7885b9b0016a6171c2065862a170ea85a966235152d05f0402e5aa339c9257. 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/FRX202224479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887790228d2c46e34d5e4807d7635da0ff929a7163fb93ad351f52fc184d8b18. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX202224477.
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 0x371c5abb4c9b8ba8b85078cbdc0595227e7a86355c234f544deb7b09eed8bfcb. 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/QZFP52297104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76516e5fa3c8533665339445241fcc12a93bafe36b5d4f59d7ec6754083857bf. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX202224481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd567313157bfac27043054d1fb39c2937564bd08e22c94df1f0c22928c1d66e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX202224482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ced85199dc8cafd8770ad8df57a733fe0a6cde4cdc8574b3166cc9270b22211. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX202224483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc33569a3e3584b8887eae8b7b091eca0d6f3e33237fae7ed6423902e12c192. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX202224484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa917b08c5c67abd2b8bc481e5a45b9b1006dc655722fafc3c000a6c4270ff56d. 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/FR59R2244939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef6f41f93d52ff11e0707896aceaea3274410b8082a223e22f2963824f9187. 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/FR59R2244941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0065f703dbaf7c3e77ffbdccc7661c7805f02f630b5be1f013ceb5a2d9092174. 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/FR59R2244943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd160594219662fadac8ab8a3966c87b771bcd8345a9a1f053a76db3b1c7e2af9. 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/FR59R2244944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b71b4f271105448c3a3cb67b299c832787d281db710e4e877d42bd50350f80. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR59R2244942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c29fcfc2614c7953c089168bd7ba001dbb04704666d667aa008db8dc3d83133. 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/FR59R2071490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b88e7fbdf822621b2ae993f1c1b35db3329660f66683be06fee64e96b38a964. 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/FR59R2071491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67566b315b05994402400ceed6e3770589171a90afcf7110d5b4619220d4d5fc. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR59R2071494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d6a4c51f42c01b66c53a95f58fbcb0c93987f0b1b32d7ac477b8c099d22acc. 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/FR6V80025833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77db39d38b2eca471e58950e73fda481a8e92ed5be94987e0e486557c939edd. 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/FR6V80025834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d2c8c68d952ca79e41a66cdfcb45c01f66b5e2555e82f0fa0c71852ff66640. 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/FR6V80025835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea8944e1d61da0fd2011aaba007f8d66beb499014272dc1cdaf13f6a926818c. 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/FR6V80025836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c29bb283d234060f66299b2f90d38829cb68e9e74c4a8cfc8e52716a09ea9c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR6V80025837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23aed04e359be889b198324a89e77d30c83922fb52cf8e3f268a05f2ee90d1d3. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR6V80025838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddb1d9806ab73259b8b28325fc314494d2b570e9b86f9105d6760532247a2bd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR6V80025839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2929f5a2e2c1369bc7dff51b17218b6cc92066d1da3f533b8e2a2de46c7e1. 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/FR2X42309958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538917d2548d61b63721ccdbadbdb65a44bd1594cc458c8f9d05b44debea1ab7. 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/FR10S1655547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eda3d1f096859a3aaf780bc192f4da0fa7af64661386439417e01a98e79c918. 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/FR10S1655549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b89573a103ee0a980da652b68391ad7df7fb42d8d9a3f3b8ae8bf1c4698fcd5. 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/FR6V82093411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7d23ac75498ff41673f2f7039e72c158c52427063340b8bdfef487edebf821. 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/FR6V80921661.