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 0xd07a7a8f2fa9047b4e92da9b47c7aec6ee3c5a05f2980bcb6988390a81cddb87. 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/94d70213-6d17-482d-b517-17e212a4633c.json and https://artists.proofprofile.net/proofs/artist/94d70213-6d17-482d-b517-17e212a4633c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
İSTANBUL FLOW Sanane Lan Dallama (Remix)
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 0xbc6e7a77b7ce68c7bf13bf5c6adfe9e8633d5fe906924218cadf99ef9a0cde86. 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/QZK6G2095363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2540e43db7333356132a94f7f91f016d102e9edbd262610ace687cbb443092. 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/AUBEC2336454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d2b69bc04cacdf72182f058c0bf45dc0041ca527c92f3fa20690726dda0d3c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZYXP2324669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f5dcf1260c2830c6ad3084d06bbe94d9fc27b5f69c287da061d74282c8d7a3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/AUBEC2343670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60158afe886bafca3cefb09eb7eb1022dae9db7d25386b874cfcafa8029e35e. 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/USY242497956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcedf89d859b18f3e31369353593b27094f58812996910f8af9c16f390560cc8. 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/USY242497957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa131d28a8542e8f1ef6ba1d59658d9afcb35992ad6719b7c0c3865f7e269a553. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USY242497959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3750d759c5d27551208f5eb1ef515194a0de15fab0433d03829935dda29f63. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USY242497960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91fa04cdf4b48841eede65a96cc72161520061104dd768a0255de34aa3d69df. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/USY242497961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b1966ae1314050b959192f29310288e26756dd6df067a5f2d02a1962827459. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USY242497962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e10a15dd1d850a5b2f374b315db6e9ffe2b264fd7615035aab052a8ed4c807f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AUBEC2501224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd849ce35f23820bfd2f4de231dc966608a9ee7f19a4aa64e081467b05693e8a3. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/AUBEC2528183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0a8de8e9c048233f3578fe26a689378c6acdad1d23abff88494e71ef20301b. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/FR96X2541002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee480a4d3369d80b2a12140ca0973274ce3f2f473c903abc45d9f5daff33755e. 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/FRX282515572.