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 0xe349b5b07057bbf69f5cff73d1d984a367cf29f42b23b364ff1492ec7a20d6b6. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6187f55-d4e0-40d8-83e9-4414dd747747.json and https://artists.proofprofile.net/proofs/artist/b6187f55-d4e0-40d8-83e9-4414dd747747.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 0x466f8f37c6d0bf3a75c897fe2269cca6e555daef6395cb2543c3a1b8a6ef5514. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DGA052310682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466f8f37c6d0bf3a75c897fe2269cca6e555daef6395cb2543c3a1b8a6ef5514. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DGA052310682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc9ac47140429d658a82f75ffb8eea3552cb15ab19e31e4517074fca1a6491b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA052311337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3686fbf43fd612ccc30dea310e8a42a7556661082e71e3d53eaa76f577b66c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA052311340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0f8cdb3df192a33ce90848cf856cf82286c0c61f57fbf97975205c4378f53. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:26Z), 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/DGA052311341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bdf606dd96a152376a5eacc6f3433934e185323e7e1eb245400c814842dfec. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/DGA052311343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc9ac47140429d658a82f75ffb8eea3552cb15ab19e31e4517074fca1a6491b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA052311337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1d09689db8d2bbbc4dc9375cd5d335339ee9fb3e1374be584b609771ce8cbd. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/DGA052311338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3686fbf43fd612ccc30dea310e8a42a7556661082e71e3d53eaa76f577b66c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA052311340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e0f8cdb3df192a33ce90848cf856cf82286c0c61f57fbf97975205c4378f53. 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/DGA052311341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929e87e584bd2762fc5dc5feec83c2a5565f43c61ddef59dc435322b6ea04953. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/RUA1H2029848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bdba8fe7fdedeef366acdb8e03e3cd77711db9048615a855bad4c28a03edbc. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/FRX282409355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1304c941e5ef1e9ab1dbc81ddb64513db6972f606086c14da0a2b854609c0a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DGA0P2334970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62dd891077b3bad5aaee2085e3779f5e69bfe6142713e923ba5d48b97de40ee. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DGA0P2334971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1304c941e5ef1e9ab1dbc81ddb64513db6972f606086c14da0a2b854609c0a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T22:05:07Z), 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/DGA0P2334970.
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