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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2635be12377c67d18bd0e3555a03259198a36fe3e8bc25d499432f5e03ec478. 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/924a6563-e2e9-4ba7-b67f-cb8592203afc.json and https://artists.proofprofile.net/proofs/artist/924a6563-e2e9-4ba7-b67f-cb8592203afc.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 0x28bf1807b803630c599a8201d9ee31440295c66b03a4fb85496655fef3697bab. 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/QZES82229741.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc444ac759a69953a3c8d13761d8ac89af83c9a9160c7c1a21383928873c7a6f. 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/QZRP42390684.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9b330dff30bd888e74fc20970ffac9ac9bcbb240d47d7bf16ebbb3cb99d5be. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:41:57Z), 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/QZRP42390685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420cbe57081120d82172d638a62248d6332249ea2da8e848597e732c6cee0884. 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/QZPLR2253567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab43e7ddc7b497dae4680d46d37864d45a6b656e03dbac844a83908be7db6e1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:26:15Z), 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/QZNWW2222784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75610b3f88c35c0c276faa125a92d94a288482a3670a8c0947ce1641d9f1ac5f. 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/QZTB42284375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9f51e5e16d7f20ff44d15791508e77a5bde160642f9c20b8461144c0f01a20. 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/QZTB42284376.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabd3d5360563e641affc5313909388ed9342c5b929badd0f685f889ef4d5be7. 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/QZTB42292205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6d97dee774de8deacdecef052d9a1da6230124610522ab7e797341f627907e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYY2390583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af1a389bdfb2675358397e2d4d434088af4148464404ffae24e4d1db79caa89. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:05:08Z), 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/QZES52321555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb77f522b06361bbe8c3d9647692ed20ca3bf1f4ed2b6714aebb9409998fbd81. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYY2478020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c47d8700d8c5f7f75c7c07acaac8ee6324482007d631e3da896a5c6647bef. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:02:58Z), 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/QZHNB2445795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fdc81ca2512007e23288d937cad7e4314e458fc6bf6aa407cae6e2e0ff34eb. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:24:51Z), 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/QZWFW2411141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b062ba4f5f835c65ee539ff0f0fa81280fe821dc8d6ee9e9854b8eed828a4d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:05:57Z), 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/QZFZ22526409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725771d9e39c51e002c1e1574d3dd1e2cd223afd41cd9a0b431606624cb538ff. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES82523477.