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 0x57844ec93f82d457cd06db9b80d1bcf040b223d5a8f9d0dc4e550bf1bf1a6b3c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4ab5589-3c5d-478a-a4d3-1320a95c7c8d.json and https://artists.proofprofile.net/proofs/artist/e4ab5589-3c5d-478a-a4d3-1320a95c7c8d.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 0xfd9217d96a41a87e62091f859d72012720d1500dfdd83a030af1882ff8e01973. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZES72198250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbcf9c55be42279e85840ed7bc8c0403ea2ab562f47a9bd2804b7b880fcf581. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES72198251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb464911b4246f1d57cc75d1a0e334ba0e7948c0a0d7d3569d587e1ed633bdbc8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES72198252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275c8a3104eee1303292f5fa77bac48af75d9dd635345165b11d0795c89d7be0. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZES72198254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61db395ddfa07f2066b5622396843ff5d56fff37f9a7df91b6d460ed5da7baad. 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/QZES72198255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec22e472ea48822a56503abceb4dee6f9df62ba45a601a0c3510c0c9ca12626. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZES72198256.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc9780015dbf5a28eff4a1c559128007ac26e0f4b6b7a62d3204ee77587e92c. 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/QZES52241854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b44f40822e00d21c79ad290b78cafca28d0585659693468ca421fbe62471fc. 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/QZTB62238920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ad0568049e897cb111e6f5ff5abbda71a4b1af310e38b93e7daea3ec284de2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA52308675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5cb1dca0f82fc87cd89907b6ef24b446ddeb421661133e1c534e7e2dcb40f1. 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/QZDA52349791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e27216f0d017fb9cf716f985af032287832fb13a7d49a0042e9d50de7260bf. 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/QZDA72343237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9509f5a5936259705165ded09926d2018e0f55ecf1d3c66098a331aee8243c0e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWR2309124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181c770ed191b9090c6b503670af015cc39f6ee2d86d7c1c2aa0ade4741c57ca. 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/QZNWR2309125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca79c0646df3679451aa48b1f0a46df27f39e8bbd4103a402ffa840c4f002ad. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWR2309126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6852275757fee0df0577f2abe1e519d43102571ab5de0139f166642112843ba. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWR2309127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da8bc8bf0de2c567f1c33a38afb3cbd538403e8f9843788bff9ca4c1f97cd43. 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/QZNWR2309128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bdff5d7c67c0c9a64e622bdf4b940b405342185fca45214ae91ecaa7c3d70b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZNWR2309129.