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 0x4cdc1443538d5d90dd96c65d4054b6a94aba16b781793facec2dc12621ce0d64. 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/5fbbd581-6ce3-4e4d-be19-c7b00ca17248.json and https://artists.proofprofile.net/proofs/artist/5fbbd581-6ce3-4e4d-be19-c7b00ca17248.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 0x92beec27593dde85799300fb50f7c9cf409b4e642915433f784bed93297c4189. 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/GBLLT2301546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f0b4eace0b61e29e2811b5f6b5401b39780feddbb3d64e7b259978f2fe545. 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/GBLLT2301547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed544e57040fa631c359873f254a124e2db718d63d46638f61b1bafef4928225. 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/GBLLT2301549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c387e4671822654de56ad3b37a673fe42cbfe7c28d583f86d4c5432f2ab3abd. 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/GBLLT2301550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcd504753ae2e775b3ffdac1ee1a2a860ac14c38d8b4414789cf078debac05d. 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/GBLLT2301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ca7d8be5e2d858cea9d98dbfed87a38310e2ee7d760b8ee2dc4af7c0d6468c. 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/GBLLT2301552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda48655e2f278439993634d9abb3e4a5ec50359debb4b9fdfcace94a2af6b2b8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBLLT2301554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b028e2f23b193ec0e560eb6e538d9497905894c3b883b8a6e321319507a327. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:30Z), 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/GBLLT2301553.
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 0xf7b98f155e99e585b234675cd2ccedbebd7839d0cd046d8ff38dd1350ca4eb9b. 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/GBLLT2301545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe4d91f15b65510fcfd01961b9e9ac9ebfc1f74d84c87b1503f86bedff1af88. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBLLT2301548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59272c51fa5c306fa3b5a88205dfadbe14fc14aadfb320087c093ea7af6f8b8. 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/CAW112100253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c9c9be7f9b1695a6b44c563c151b611b1bbe5916109d92eee3188ae84f199. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN82093782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3691ac96478b04efef13a9fdf1e2dadb5d6a7541135f8bd70a7f744ea27cd61. 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/CA5KR2015141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4030b0b5fbae1a43e03871f9bb8b1626cd5a859d14d939422fedafebce2a78b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ61973548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca77744e7d8ffaae38453deaf23752cb32376dfbc1bfc4f065ddc3c4bbc50d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFYX1944714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63df2247730e9057839a6dd9730acdda9179f68b00447d7f31934279f3ea64f. 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/QZES71973065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc008aaca5b6d7c0fa4f1758d75519efa0cd136f94163542e86d2f5e6070cb00. 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/USLD91721330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe152607990044a83933e722e555f54f7e6987c47a869505372ff5df6e34ff2a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEC1990045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89940b05d125aa635d1130875b91e56868c2b63bea2e02031dafb074f59a7ed5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEA1813947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaac926713682de1dbfe4ff21a98c17e148f5ddb93b74c69b4a46ce26e98723d. 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/TCADX1846730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd403c467ee3a087a7979987947f81bf079065643ae6286acdf5ebc40d85eca46. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR1980434.