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 0x527583d54b6cb85775747aee5ca3d0e3405135f30783e5630916c92e7bed5fda. 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/4820e218-f7e9-4599-b284-5fe62264cbe8.json and https://artists.proofprofile.net/proofs/artist/4820e218-f7e9-4599-b284-5fe62264cbe8.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 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 0x571e6abbf0b2245a409a80f747ab27699327bcc5ec6ceaae8cacc2a4171fcea2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GX5MY2297699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6843d4a5ccc0b423beee4409514f845a33d7b6593e258f51fe947444ff5a22. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/GX5MY2297778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138b587f36975da3b6aea1143a729a70c628535d33d99cf94fd17bfc6f3f5d47. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GX5MY2297783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8989039733d22bd9042e7371084f2eb7917ff90fcd20ebe40eae94e9711c4cd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX5MY2297670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8b1daef712da892aaaa37e3f8ef9c6a00a2bb96764f6cae41561e010c515ad. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX5MY2297805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da66ad475be683147280886c3b743c29797b9f460d3c24a8472d2ef17debcee. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/GX5MY2297816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69b98b3208ecc13336f3a9bb82ffd7c7d2411481d171b1eada3d4a35a3a7162. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GX5MY2297796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380074d21d10ff4c731f6b9874840294e6cfb1a10c78fa57bd83d54d9913ec9e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GX5MY2297815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68eea75954e04e1935d0c0cd84ad8c2bb7833246128ec08e6ae09f24405f0d1. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/USLZJ2365772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8715b6411d88c70f2a5583e5a170275b7150834789950103f74c9eb0e64dac36. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/USLZJ2365793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e7ce521dae0e13e7172b6c52394632028ab895f3ddb9fafd6ebde85c88320. 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/USLZJ2365797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d245023eef7747e8a9a0e9f01d6e095bc01608d0ad936508abe90992a64f2c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USLZJ2430035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d28f275a2986af7854307497f8d0a628ed9ddccccdf690a63af9a0cbd09a7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZZ8A2482320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33b3b7f809e6ed1b55fd7bfc21903817f60776335ae03336d6fee0275f41be4. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZZ8A2482321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7021002b5f260967c3bdac2602fd1285ab2e86ba3d6f8b4786675133ead21a3. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZZ8A2482569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf4ffe42fc24f362fe46b5983d4d53a8bc16d35dbe9e3626628b3d57c2517eb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ8A2481862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc474e612bfd320ef1164d3bcdd5c32826d073ec9675f405668b425d8f2e7679. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GBRKQ2551612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5131e81033d2beead928b64bc3102cc1f34ff804a37910341740abfbe3f88e. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBRKQ2556045.