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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 0xbef0561f918bccbedd7daeea9dce98b3f0bad0adc1d9abb971073bef936d8b26. 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/5f1c63de-0ccb-47e9-94d9-788b25e9d630.json and https://artists.proofprofile.net/proofs/artist/5f1c63de-0ccb-47e9-94d9-788b25e9d630.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 0x8395693262ad0f0480fd66ceeabbeb45e51db79a52ddb28736fe810fbbfa02be. 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/USECE0800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1305a0daf565c3a9a19033a6611f16f7bc52d0f787e35481a8a0e92aee6b14. 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/USECE0800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ec3552fe5f61dea4eb915777459d63388569231f92944b4d0a4d5aee107843. 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/QZ7DN9600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c5946eccac19c46ba2e1597a453aaf076ab508ff990ea603c237c320fdebf0. 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/TCACP1618184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc25b7ade942d996ed690a62ca4ca81261b25e96fc8fee44ed90276c805411aa. 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/TCABN1347717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4358af12f427f1577519b08c42d354b5abba582cdb15daacea14562758e41dd6. 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/TCABN1347718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9d1dfc66361f2cbc3a7e53c44171bc37750bc969dbf5db4f195ed31d79c2e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABN1347719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9047daa32a89376731f2f25cbd512fb81ceb74dce3c6913782b331bc9dc90d4e. 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/TCABN1347720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d4ef3e9f222f652aa3c3a3f71fba5928cc2fec526f232ec7b62b7b9b7b04a7. 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/TCABN1347721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06eb13aed481fe6ca5997a24f7bd5bc8c998c3256eacd4acc0b951f3400e129f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABN1347722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e64fba3a7281a960ae804b849661e785726de2b2a09dabb2e9769a56f8ac62. 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/TCABN1347723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bb7d0fe397038c65a35830769172033f811809a47187b9da0d6d16e2fd409c. 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/TCABN1347724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f0065dd1c4ea74c7f91167a293ccaaa85af8847409f3364f9b1607147a6e9b. 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/TCABN1347725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa3d001794e20f6de667d1dbfbd0491d325fbe57c2629e4bfdad802dc83868a. 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/TCABN1347726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eb5f7cd8a228dcc883ba5d3abc91837b32148bdbad235bc04d589f3079e023. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCABN1347727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42df5295ee24c23f8b9668452dbd157dc19b55d176a2acf956d71e99f074502c. 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/TCABN1347728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858393f13b36aaf7c0c3ddd900716f665718f28bc94725c5b7796065c4aad803. 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/QMF891804413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d8a86aa1bf47c93482838b32c525cd580527452aa4cb640198afba31669513. 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/QMF891804414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60be745ae73277e0d779925bbf87d7bca959ae0f1572d77ccc79a82e9035ff49. 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/TCACL1612854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8410285c31dba998d2bfb59212bbf00d62e8064ac832d41cd5e08abdae0ab49. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM81283866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242e98f3b20367be66a11ecfc0fd76a2649e0954314e68f07a5b4f3eac26fbaf. 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/QMGD71500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8548b01f15595930056bbcf585ad6187181397f44a1581d08e9d14cfa289b408. 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/TCABI1267195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3722530a9dbf25230bba478acb1f4b669b1e1c6fb16ab60be0cec56e048f7b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADJ1774589.