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 0x39665eafc5b3002230c1081c832524d0f4ea09d004227001fdf144848521d6c8. 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/85b92400-9322-4d2c-ac87-9402988d40f5.json and https://artists.proofprofile.net/proofs/artist/85b92400-9322-4d2c-ac87-9402988d40f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
a moment we will never see (slowed + reverb)
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 0x4259ac256cfe914d724e0323547375b5aca4a3c09379b5536fb7bb9d49e64d55. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZPEW2414823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bf6db063e6b79987708041254d61616adcc35117d3206dbec40df34cb9b32b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US3DF2461660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd2a334d10a64991e2db729b0baddec369234e689732597dfb4798d5e36cf9f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/US3DF2464785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563a8a3007b3b469307060df6b57a12e302ec5180b30a392166f004468e91873. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USANG2412011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34268e9241be5705da781bff296c947c255d83eff0398fd633f9852ded9b143. 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/USANG2412013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1952a7974ded4521e94d71ba40d73e0e8c55215353960d877fd51550922ad26. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USANG2412015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9690bf0a392138eb30776647d110c3e90743d8f42b4165c2bec57ccff0cea6ea. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/US3DF2478016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85f6b556ae0638e744bffa7b72cb677dba64d2447d7ccf4c19fb6d746844421. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/USANG2438125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f1f1ea52d21ff9d858d7db2fa66cf941553aabcb54cc82908a24912a30f43e. 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/GXF972477929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcd186c560d55d105854691ec0767e19761c19bb34389074296cc69a41416f0. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZVEM1852072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2cf56b70f0b41b92d6dbea94792ebc7e38955d9684afd7d9cbd2a0c5722dd6. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/FR2X42503335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7ba24940479dd06da548bdcb39015851dd50af2ba1df689250a822341eb3aa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DE1H12500339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8b9f1bd7dd9174770b9e7b42863da980fc9b7231bb822a94feda248c11c474. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DE1H12500340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788432ba4ec30150fe29c27cd126c7905a1dae6025dd30a2ab19bd6b57b6b234. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DE1H12500341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b481c38d9aba088e9da10cbac87cc99b9208e1ea578999500454b7a8af0ed6. 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/DE1H12500342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f52cc72ce56941d40912d1740b8ea79f0295093f0f69e6b1e81eed1e123e5c. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QT4K32570888.