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 0x4f27448421dc5c0f2d3180010add530f963a15c61e30ba1894e640d4e71408e5. 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/5349f0ce-5344-4c1b-ad49-5fe3f3dd6b52.json and https://artists.proofprofile.net/proofs/artist/5349f0ce-5344-4c1b-ad49-5fe3f3dd6b52.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 0xb055633f78da4d067fa5dcb22abae0f677e6485977464c72e5b9d50e80fe2a0f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ES71G1840249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f919733d0dfc23c18aedd6555aa2b21dd7b6ba4fb09fb8776a4ff1ed2d2e99. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ES71G1870009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc3dc76cce48c596b9c46d0b1172821832ceeec8fb48a130c5180ab41f0ae2f. 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/ES71G1820716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983f933ca4f0cd07c4afe782c93810ea2115a71908b9851f7c5284819be7ff7b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES71G1870011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705398e7ddbe9d7bb5b4e338bafd609e6d16b17e54df72e3b86b68014087f34d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES71G1870012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1e6f6c60dbfa8265a02bbc5844e3b6dcc5ddabc8c08186df28768e3177a8ca. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ES71G1870013.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca88303d8dae4c4b33d244129246b6d0e59ac4ee6b739d6402e9bb941e82427. 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/ARHXW2002729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b39c52931576037a063a7955ae715bef40266edce0b8403d806eeaabc32042e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:52:17Z), 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/ARHXW2003637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a36646f1ef499a73b5ea66efe81c08239ac5c32f9c4845a8fe991275c044d. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/ARHXW2104627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7566bb92bcd58f0b874f1f837c639f12920a676b7219d330a04cbebb83d743. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/ARHXW2104630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a37417385e12a2715354f154288c421014aa08f51d674a1c8ff550aeaf6939c. 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/ARTWX2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dc8dcf92090ffee32852ed03116a788ed6b71bcfdb1565ee54895c35ac8460. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ARTWX2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc280e2ec0e675c5d0c52c9cf83978618143c7a3c640976a47d96625661dd79eb. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/ARTWX2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58a7f14c2c9d3799a6fad4b90c2a2bb3d36d0266aebe857526066714808b5b4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARQ5T2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6285fb433653244a6d2cb28d7c9d826476d080f4e983e1ee8bac2b0cd2d5630. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:22:59Z), 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/ARQ5T2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a482029ad7dd1c9ca0d570db2058b4ea2312c64dd2adb3dd80dfc17ab032023. 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/ARQ5T2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b1f46bd767f0cda6384fd7d7e2079a967c71da3a796571b33001dcafd704da. 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/ARQ5T2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93b50b15ecaf7da634c62f506c7b179b2e4387396bd4b838aca71ed916d4257. 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/UYL182200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17136b0d2cc1e4af3d0604debd1082ba222ab521ec89b16adb377a05e5d83c1. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/ARBSV2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4f761d438d2fc8d9a788af8a4f24e2908c1eb1b2da59e4138d9195594d63c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AR5QK1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b3e506b07a3854a9d416e25eecaab00429078cacbf59bcebf2a1fed847e877. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G1860310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfbf9189bb2fa07eb9ed4a40ea61be96e8fa7b1a90473b9861ba17c49fb17a3. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:01:54Z), 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/ES71G1931101.
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 0x2fda6f7616ca9f92d2b19fb51a764638ec29597ff39eac4e03e6904e463322c7. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/QZNJV2095596.