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 0xfda779105a500e2d8a68e8b04d5b08665683f34add901e8a33c1d1b12dd9c3c3. 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/27bc1ce2-d976-4065-ab8a-3f5ac59c5614.json and https://artists.proofprofile.net/proofs/artist/27bc1ce2-d976-4065-ab8a-3f5ac59c5614.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 0xcf55a38148d9e55e0cb59aaf568cc11d98d063610e61d541874a45c113f30bf8. 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/QM24S2000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea7c76e85dc2f8645f82d8529ac695f501d6f8156c4ea6b42b29c28f4d5aafb. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZES82042768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1e1225b912adbf7200f8d0590001757e396a5e2688a1596a4a3b083016b420. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAFD2089090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ab7e7be95a61651589f0aebfac84a3f2baa613e38ccc16a210ab696285633c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLRD52018581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177aaa5b1d58be466302727e2e891251fc4b5b3886e32d075b272e2d530c9a21. 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/FR9Z62100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e00b17f5715ece19134687c2b4d87bad32eb3a269a9097a822951bda0e2327. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2160331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbb3ed0634b6162bd60b979aba6b5034f146c7efcf1b66995c077ba6e353352. 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/GBKQU2160332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfd1baeb18e4d26eb7f6c3e988804f7b71a6bff4f00d6ffc6254b49eaa5c168. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2160333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b24b0b001de1a019982a045d78728ac743a5e05f87d1b09563eeb3e191f1e2. 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/GBKQU2160334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f854e6e54b798248fc62970ca5199e8bec46472dcdd9503b6a24f2eb8c156. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2160335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6853b2f6a399a2bc513a63c7c697fdf9d1fec1dc8b80157a1dccc09b51fe8e5. 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/GBKQU2160336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5265db814a629a409b2b7d6683774cdd6b6eda4130402e92c5816c6e7f296fc3. 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/GBKQU2160337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f06b686e37a22521b2570184d07debaf6d4a1be3f2b1ff460e560c6bddefe4. 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/US3DF2153044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ce797e6a9ec20c9105739acb8636d4e3e17964166f4cc28db26913d566b2ac. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DEZC62113930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759572146609826e8eddea0652e68a8760fc25697b10c81792a5a62a12aa19c1. 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/DEQ022116793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30290accc88fbcf727da29429b6135d8f52df54757f96430e5a29a7eaf8455a. 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/CH7812102188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5bacc13091909f25a56033fd5b30e99c4e9d42b68af5625072b0c7b528aac8. 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/DEQ022119865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937ea958d7e5e6375f5421a3726620f86ff1d79555e063ae87f7fa328a9260e7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CH7812109672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e939c5776428bac6b9118de40b602ebe173a097d130e85721eece903b4a8e0. 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/DEZC62317591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15420c9351f1d632c3be18e0a1dbb3c6116f37a779f32c4166658d92b17e8d3. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEQ022285180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71951cfacda95111f6bacc5ee6d141bc570721b90e47838a13241b93bc2797e3. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CH7812224885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31f2b3117ef9f09f3c6735b08728fab3eccba5d360e7717a69f2f60ef5f8694. 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/CH7812236738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3fde0f8c0b8e7a51fa30ad2a9cbab4d477d73aa68a70a77114687746ee9501. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QM3DF2215982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1513f390ae87e2116159dc75f95cd4a0d835b9811a424bc349c75af3615a178a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM3DF2288605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e8fbf19e83ebe6132343abcf813109a62e591ec645f52d46e5f38142b58fc1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMANG2256881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ddd408728bbe09cd012754fa6f119ff345efcb8ff90b6eba34d5af3506c426. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/FR9Z62300818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15c378db36e5868356987c632c3ea124126c2495f7d7d0e300a0ff9bf57c02d. 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/DGA0M2409102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528a7ff028a83485a1ee7ec7de9e4dd9bcaea6a723e20b8dfa633cbf983a4a10. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA0M2412202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be8503427975f3095cf63c8ba0e6e3517c64c43f96de13927a343df5bc7d0c3. 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/FR10S2536885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe352c9799a75bc591355a5c37835e421bee3e0213e1c9c0d995882dd1ba262d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2143678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fdf1986d69eda187dcefab23ae36145d8532fb02f26f20b455b73c65f2bd72. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU2143676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45c9b96166a0c8ecef2d076675c1a2a2e04d45642314ccac19057f5fadadf02. 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/GBKQU2199402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a9689f51f3c9dd525e2659bff6c68e1e4f4cd23387f2aa24eafe6f71b21bed. 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/GBKQU2143677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc736340a62e1b6b05f097e4f51af2f2da2b6c08f20251730876ac6178a416df6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USANG2204984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbd195a2072f27821d3990c5529a4aa0bc9424e04ae9982503badb5d9df4995. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL4YD2200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66014c136584c52dc580e06bc7f0f648c7456689bc92f507d148a4d7ac036f06. 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/DEGC62102467.