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 0x5777a3c5ebb345c7d05bc143bec7bfc848fdfee01f88c263e11b9cf847de00a7. 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/784c5283-f0b0-4c3c-8bdd-1cc0337dc6ca.json and https://artists.proofprofile.net/proofs/artist/784c5283-f0b0-4c3c-8bdd-1cc0337dc6ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x3215377e49b5551325069d7f093495bad60c2a8e30dfd83b92b073b3cc824c7a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBCFB2000677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69368e01cc8cba39e865268726789564d3a4ddc2cb67f2171e17530a584d1f4b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBKQU1865680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69368e01cc8cba39e865268726789564d3a4ddc2cb67f2171e17530a584d1f4b. 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/GBKQU1865680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb36f24eda4769e528f6e2ab35405056bd68ed7ec3ce9f2d48ac25ff42895433. 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/GBCFB1606322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ec61880e944ac90040cb45b02200913672aeb2aefae16d47271667da48b5f5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBCFB1606313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb37605ac7481620aabcd1f20665ba3e1db95ca200170d36241fd2cd37f9f55. 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/GBCFB1606326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f8c48e703f0b10095905ec1ddaad4725137842715ea9b018ca91de3e70e068. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCFB1606311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c4ca6e9fb600b65bc8afbb0fb665e1cc085e5ddf1671b99b9b6993bc2fe0cc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBCFB1700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cc69b65d89c9e4104f5399dfceb081c0913b1c3f2d9a6f84970a7bd8590b6d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCFB1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490b02badbdc59f1902dabfa95cb2ad680dc4ef4e4bce607e4a14e350c1f89fa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCFB1606320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227ef46c20d95654a5fe1a1cdc232aaac4e9da6f9f21dc138590f469e0c7515b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBCFB1606325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cce3d9d755a758dc1fe9e334404b266816a8ceae1dbfabf810c91891f5c6f0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCFB1606327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a005b5b3ecadf031ecb2517c3e4550aef57aa4a4c0671fa755cf380c5b673f1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCFB1606314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cccf0530f409ffb345673959787055360be23e44ddd370d24cefc3e9722ee73. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBCFB1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea93e7e0fe70693b7b736bb84c4986f22cec154eb851016acd361473b861287. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBCFB1606323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c4ca6e9fb600b65bc8afbb0fb665e1cc085e5ddf1671b99b9b6993bc2fe0cc. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBCFB1700121.