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 0xeb066263090ac06e550e95632f02b4bef4634a2cd066385b735bc875112a4d93. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d5cf1f6-b0ab-4c83-91c4-066c18376779.json and https://artists.proofprofile.net/proofs/artist/7d5cf1f6-b0ab-4c83-91c4-066c18376779.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 0xbcc45ff2c31788032b1f7c3ac85542051d9eed5a4c25d703c62a4a5245fccf47. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ESA112441286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee09077fe7269ec9d1d583ea66e933254c4b78c38a37fc69731afe9c92025d7d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ESA112441280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494359ecd1377780924760b073f970cf8f8badc5913e3a50567abe26fc43760f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:53Z), 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/BRAKJ2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c5d35d920e422ac7d15671e12d52abbc50243fc397a1de16a679c9691f8d86. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:53Z), 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/BRAKJ2000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c9f70f7c08c035b53210ecaa8bf20cdfee9b1d0bd4943c4c9bcf76933cef8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHZ32279000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc4768f06cb151c5a8978c9b426117839a095650021781aca510a8bba14205f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:39Z), 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/SGB502304203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d6d05f9fe5feabf53a295df662eb525e03c8241ce3c8c78df8e3bade4dd1fc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SGB502313971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fc6077a8b05efeeed7a30a3865971d0bcaca4f1c1e835ef1408547153146e9. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USL4R2352333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338365e447386c679d5f4f889555a3e39febb9867529469a90def2624da7f221. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USL4R2382986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8739ef492140d62b7cf46f8b6df6266f3af92176437858ab3ab54b1c5f3f620e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ESA112441533.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b2ae26dd3a4d9cc78c666711db01b5c1b33d990525d0beaaf40cf7e5eda104. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ESA112456808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284666b10dc916fb1b3c623ceb2db9f70de4ab52b15205f61fde6c1a12900f5b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ESA112563884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7c7087dc8a352f2689a823e1a9c4666e5e309320fd9f20898bf53b2f2d7926. 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/ESA112570028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05325f474b477d4a3bc69eacc586ddb2bed773e1dcf8621dd026570d15c6027b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ESA112583457.