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 0x52b7686a57335ae2cb8136e11ae1d8850b2cd316cffd65543a63e83ebeb39ef8. 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/91cda483-4a2f-4742-899e-91b3cb7097dc.json and https://artists.proofprofile.net/proofs/artist/91cda483-4a2f-4742-899e-91b3cb7097dc.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 0xa2abdc6549917282cfdd00298efb288b6a9ab5c4205ed07036403dca2fdd9e75. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/IDA432017160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe4b0008f75ffdd8aea7fd1ed920705dd215b0c378f6b50f4d96c5bc1c234d1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDA432022341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a82a03463aa6f7fd11facabb97381ba8306a05b43a272fdf0575b51354e430. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/IDA432101544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27a76c886a2e1df0c96338c1999bc28664734e0057b15c4ad3ff4b736509c46. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/IDA432100409.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff1ce47a5bda2c77c81ff5c5aa8135b20148e27317595a50b3fd7e72570f7ca. 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/IDA432101620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6e66b769aa08ffb8a0c9089c4fef4267ae59b2f5754a7e1140922aa740af74. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDA432200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767f5ac0b5df5b69db0a7401147da1791b32a8301dfa0d98e4a5cd6e2b7a90fb. 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/IDA432201199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224cac8f452cc50f5bc8c68843d58fad22f00a8e68c8a9b640d27aed020796ea. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IDA432200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6124af8f47ed08c2f4bfcc1a9e2dc92f4d27548d93a685a2256437ff5619ec8a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/IDA432201200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa559a06c5e7039b4c0b18a779832ace52401643ebad1df811988864e81ba5afe. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IDA432200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc655fb9fbef1950cf59dc415f31d06c73a519ce86f0ba17078ca59adee9926f4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/IDA432201202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35e7dc0d9efa92c7a7189bc638c69960458b027627a288c93c144e4878452dd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/IDA432201205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5b894b7a33a8187144061a14f2293c16a394579be8df626913e33561fce499. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/IDA432201206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3c60e8cd935c3819466d6fe37a4d4b00d692c98f62a678b0e7ed67cdf8b997. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2454839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4936e623c306dde6afeaa4a55952f077f2408e74d0e2321d62a53033af2c1d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2P2454840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61178fcd454cf2705bff06d401b877ea0c36c3e95b3bfb91c4f48998676138d6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USA2P2454842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633c5cb4c02e3fed8fdae61e88e56ce3e0efae4dcd3189a06b2dae52b1823d9d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZHNB2220629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642343d70bd39013938c91fd3875ab7dfcf208f10bfc2298ac3c4595055d81e2. 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/QZHNB2220631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa5cad4bd4b430ec148303cbc217ccbdae6e6ca4a128e3c8a11bc7420a9fa4a. 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/QZHNB2220632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c7f83f67e81f5b70689c9adb4d5342a8148136f331c6325190d34a1189a1b9. 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/FR2X42372027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40614e2a503c4c800ba4606034f8312601d727ab08993a6723366b856134df3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IDA432017219.