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 0x246e1a399c90ba90ca0db77d6f44e41d74f07c42ce346012adaefdd6330caa3b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9fc84f0-044d-44b8-8761-278271654904.json and https://artists.proofprofile.net/proofs/artist/e9fc84f0-044d-44b8-8761-278271654904.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 0x5a2804739791616499f8a94d61edd4c8b54ed6af541e47b6ddac12790249e2d1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEZN82530211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091a7e853efc3493948d8941335bb5b110ef275d080953559365205209c56c5b. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/DEZN82530076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6958522fae52937bd2c310c0832a1568d2745e534b3354d57385a9ffd50ce183. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/DEZN82530427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84f5e0d036dc09e6ff82595fa2da766f40ace4f9f932a260b88d6017371beb2. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEZN82530368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f14f0c485e44e669b35161a261b564d43980321340aa5a162a5b3185e8aa43a. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DEZN82530393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be9d9df8dd271aba7ebf20b8c29844960a6723676c1570d10c2240110a66cee. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/DEZN82530498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fce43249adc8df7fec0db6ad96ac00ce413f46ccd90e5cc613d1b9c02472b1. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DEZN82530527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92c91eaca0a08463e8e761d184216777ccae4326225a19c6664860e72fe7b8c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEZN82530386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a1aa8df48f51f6a357e3da77f89cbaf28a0e7aaefdfdec5f0a02e07bb3f33. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEZN82530070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6afd7cff7ca96f0b904dcc02e1ae857bbf832a566a0e4fabbb93b67ae5aabc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEZN82530535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e875ee1a2e51d685697fc8dbf357b501070a14edd22e3052132d3d9838b7ee2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DEZN82530516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f3079f4c0fc6cfb00c32177dc0dbc75a0d1e52072193a18dd63445cc0beec. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DEZN82530316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7612285355aca63b5c983f079e84e9fbbdfda031c066300ff043c630cfe684a6. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/DEZN82530183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d0409dba83e5e348718cc80cb9b8d88cd203ed1784557732126b04efee3006. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEZN82530104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3142d3ba5db2cadcc364438976e94f784fbe03fcc8834e4735437126ba12a2e7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/DEZN82530452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0f692dfc932ba8f689ffd83bc4401f59ad96ae37d2bff8ed7c772d6da16fe3. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/DEZN82530111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b5ba5393eea138531618c2768735abf893dfbb3ee2d669e66c8c51c27917e4. 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/DEZN82530445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ace6d2e98a21ad3103d0eecfe78046da1bfc0f7cb2c459c04a7aae12a0e8f3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DEZN82530127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dabe9532431c6bcdc2ba0d0d573515f6fb07bf012449a4229ba21d22ed21126. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEZN82530263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba40a62bb50e1f49888f7e508d0ce59c8ac04fae3769dd75f1d707838b55427. 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/DEZN82530199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc0a88a4134b22a17c27a4a8827886bc389f0b75ed5c25e601b1500ee2c10bb. 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/DEZN82530201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97025f15b128e4e52455292489a15ffaa1fe57aa2e50dfabf59739ba8a560944. 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/DEZN82530413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f075d3a91416f177f8cc79ca02e8a3fa6ecc9b621ca945977ff0ee9c8f15c0. 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/DEZN82530441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dd185c3891432fe40b32e72b306c126e20924619a73afa70c176056b7fc37b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEZN82530334.