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 0x21ac1501f5c344602daf3e2091584787d8641bfea36f509fc8c14850ced1ac35. 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/81416bc8-cba6-4443-8820-72003a870df5.json and https://artists.proofprofile.net/proofs/artist/81416bc8-cba6-4443-8820-72003a870df5.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 0x8286efb9da8c936a1ce209aa4a51bf702e4c28a15b9ebc8e42c6e9c4293339bf. 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/BRW9C1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47d91a1a4d70852b7d5c6d285ea08edfc42dac5d78352080f792093df131d06. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BRW9C2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ea7f0bf28fc244f4a2cf075669a30657ce2d5102c8bfbba78b0dc5480e37de. 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/BRW9C2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a3dd4843d5c510cc6f4c955c4390ed93c9905c713afdcd0c05ff1519172ac1. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/BRW9C2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6152d8b96c770f1045dbcad8085c4757e152b88040f34ed1a6ff00735c1690. 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/BRW9C2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e49c8309ec7f4b32499bd002df05b51c1e21a589f2d9be96f2defb6a667722. 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/BRW9C1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3005d48f298db0a659498170c309d90a1629ffedfdf2d3257f46b0e8df1ddf7b. 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/BRW9C1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297e28de129df491806c21c5a0f14672432c3bd1531ca9c04039640d83e6ef17. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/BRW9C2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a7312174d877e258022ea5edb996926b08854b7539c553020de777b91d0342. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/BRW9C2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a7312174d877e258022ea5edb996926b08854b7539c553020de777b91d0342. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/BRW9C2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73c91c22bdb46d53ba9f659c395325df24fd9749d2db5222295ec5a1fec16b6. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BRW9C2400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dd619a03143e7f6a7e8f3e6f0780c12842f107aae7839d4c85a3f28c666e8a. 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/BRW9C2400288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0298c47088946e7cdbf21e33e372386e9f89904d50a499e8fbdfbdc959d0c2e. 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/BRW9C2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73c91c22bdb46d53ba9f659c395325df24fd9749d2db5222295ec5a1fec16b6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/BRW9C2400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2eba8750eece662f4800449693d9afd7d8119d3f8fbe92ff4709a911e78808. 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/BRW9C2400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaca38e0f4ec8b3a944b0e02e4de1b71cb1e4c84343ae31b23ef36c136eb605c. 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/BRW9C2400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd707e649338399616586976bf91b288cb28228ebe56221298374a514a9f16c74. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/BRW9C2400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e16155b8c17e683a2330851392b3f131d09d1c44e7590f5593c176e5b84547. 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/BRW9C2400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2eba8750eece662f4800449693d9afd7d8119d3f8fbe92ff4709a911e78808. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRW9C2400466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaca38e0f4ec8b3a944b0e02e4de1b71cb1e4c84343ae31b23ef36c136eb605c. 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/BRW9C2400285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f0119162658f07c12fcd6202b65e15dc0175d75d1921fc6dc0134b0bb144f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRW9C2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f85a153d6bc2da811f25b3c3e8547a182c855d9562f7aceed616cbf3b218da. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BRW9C2200007.