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 0x142e2bad2975ece883cd75277aedc8ac5bd31155dc348a422fd3b4dcf9418458. 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/ec97ec9c-180b-4359-9a30-679fa2fe68b0.json and https://artists.proofprofile.net/proofs/artist/ec97ec9c-180b-4359-9a30-679fa2fe68b0.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 0xc8644e4bb90aade87644668da03953f6fd0125c5690cc6d6c27f8575faa63cc6. 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/QM6DC1666798.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d3c65071acada0f51fabc2d491df857c1f2dc57d09dcfe2495495131486268. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/US3DF1836712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2418d894083872c1fba124087a0fcbfefec7640db447b4cb4aa02939a949b223. 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/US3DF1211485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91056eb0cfbe4aa13c07cea83b0ebf90d28b2c964f6b79004b2d4e406217b2fb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:18:55Z), 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/US3DF1211488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef832f90023e389459359fa9c680d5d77e0fec1abb8cc6ac8ea265497ef48987. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US3DF1211489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef2e89b57b2f27ecec8a868804c643abc6f7120afa54bd7db25dd50bfd1ef8. 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/QM4TW1744156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb623305bc0cac2154ff98ef866f72c9cc4af38f039467971ac4a5a323458eae9. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:15Z), 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/QM4TW1744157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d58a0d37ad55f6324a79aa3e67ead91a313cca357d6da101465d1259cae365c. 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/QM4TW1744158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60773602a19a70190e3f9575dc65d7f51aac8bb73f296db35ed1484bbd096a63. 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/QM4TW1744160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f31d3b67574f9ba39afb72ce99c29f74d6dd080cdc5db21cbeef48c5c9b33. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QM4TW1744162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96845255e58151d7f92052628771ad477ac69a35a6dcb21bba8f7430c99785d6. 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/QM4TW1744163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2467353abc62ed6c4ffd4c0d6486e6a277213f4f2ea6b2153669ccceccd4316d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QM4TW1744165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc158c3dcf80f4e5d8ca1cb9affb87631fa9da71f286d719ae5de6b946f0fed. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QM4TW1744166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7752ded051ee716df2e5a32bdc502a255ede03052731d68daa22c75dd0b760e. 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/QM4TW1744170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd712ede908ffb5032ef923024cd6c8dcd757932f6ed78534088ea49aa5b9110. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QM4TW1744175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620eb7692a6445c36022a28365b208c096924641efdfd1053db5c99b340ff68d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:27:53Z), 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/USA2P2123743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3566bc59518fa0729a11a94f0938e13457daffd39c09aae06488350993ecdf2c. 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/USA2P2123745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3753394d1f2430d13718291033b454bdea3ff5878e428b447c4b2f21908456f5. 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/USA2P2123751.