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 0x033c83933011fc31fe16224b0da8c8217832401a56b0e394177acb7da3a4dc70. 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/b9f1daff-c215-41d2-a9dc-7b4d36107d1b.json and https://artists.proofprofile.net/proofs/artist/b9f1daff-c215-41d2-a9dc-7b4d36107d1b.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 0xb11308ee7d2a5572bdabdb35426fe47760481aeae851efa3ec51d09356367450. 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/QZHN32211760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d19a95538176417c12ceeaec3f325ee82203e6c39cd3005a985ac150f8874. 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/QZHN32211762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27e9a99ab822a75ded24a674ec43205154fa70d6ee3c933d4adf232626c8d97. 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/QZHN71948378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc02051cffd259161bf6eabb5254f4fdadf0230415af0db9e7f001987bc077b0. 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/QZES51938641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0201490dbaef0a77b0779c4035e62b7854c901c9bc121ce6c12ec3c8215bdf68. 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/LTC531900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a310f158bceea1a756ace4812e7da32dff477f3eaa9ca9eb906d7bf805d1b. 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/QZFZ32229890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8037608d6d9a0b2ebaa7ed944e3eb1533d067b0f6ef9c06fddabbafa8a4fb3. 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/QZES82221092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc02051cffd259161bf6eabb5254f4fdadf0230415af0db9e7f001987bc077b0. 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/QZES51938641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189b349e744cbbd3f3571044a0db6fbc18a432c0171ee0edae3f83e292101987. 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/QZFZ42281196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a310f158bceea1a756ace4812e7da32dff477f3eaa9ca9eb906d7bf805d1b. 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/QZFZ32229890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8c2ffbd8d876071333ac78994518db1bb1fd33223723a0c7fa020df7953852. 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/LTC531700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0c38c6a17be4986d3f8a2fec7c5b5ccb079b32e4be83589de196b825b0ae88. 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/LTC531700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b6837c60fb4e657dd12ef6b1d9e3983a0e2a6fd900963e42a0a93c71ebe188. 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/LTC531700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138968bbeb240fd618e51f1ae993830a38086024390e6bdbc6d3a41191ef404a. 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/LTC531500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543cfef656aafe80b86e3dca5113185077784d06c12643a5aaf1efddf7f68fba. 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/LTC531500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dddc522c038117913979837ffa6df7b2bcf8640b907d204756d940261684d6e. 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/LTC531400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2b4886accb68da83570de968ddbcfcf89ab4d78b84b49b88d593bf44be961f. 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/LTO112500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b00fafbc46239aeda70bb842bbc9ceadac73d92ea07b1ddee13baf512cdac7. 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/LTO112400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c89c24098510d3196def89574b11feba2913296025a8e71e09a92ac59367ef6. 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/LTO112400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000d0636c1d68fbbbb84934ca0da923acdd47dc8fb55c17cb5a3a872cffe3240. 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/QZTB52214789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cf79b89e27f68650555ae455d967027f80367bf537abac5440887ce0a73d39. 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/QZK6L2170426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f28fee1d6dfadf943e90e1776d1506c6394c3652d974ab6c04101d695cb7f62. 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/QZHNC2197583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b006e474d01ab12f20e8040147476e70ccc6c7e58c57838521ab7ef7dfd55d. 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/QZK6M2049277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc88af0dfea04f83f0c25c1a66a2b4d1522826d82480059179b527b2bbb06f2. 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/QZK6P2025564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27e9a99ab822a75ded24a674ec43205154fa70d6ee3c933d4adf232626c8d97. 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/QZHN71948378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf733db371dc813d0a2301f18e9801a96d6cc2866a9f117e70c2960a81bf083f9. 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/LTC992200001.