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 0x68d1bb0268a9b3e41965a329f8195e3fd4ecedf00e99017ac5938a9d71e634b5. 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/da077e20-755c-4c1e-aac1-6ff0bbd96deb.json and https://artists.proofprofile.net/proofs/artist/da077e20-755c-4c1e-aac1-6ff0bbd96deb.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 0xa18b6525931a5a35c236985e7691b7ffec848e5145892ed964355c2e0f8291ea. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QMBZ92111376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99510967302916c77e91487dd3c184823fbb0a59e5e4334e6d119115eb75998. 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/QMDA72143473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc12ded23efd45c065a5653f64c5ce126971098ed365932da1ba645fd1b62e6. 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/QMDA62243364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d1d4a6ba470209e45d6bdb960211bd88723bb7fd643a03ca250f6a18e89b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA62222929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4347fbeabf9b27c2ecc864fbf565b6ab68f5cc3fce790d58e14e60b5d31470. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMDA62243365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb219549bc3ea685fb7da7c10107d4cdaf276e4e826d4a6c3b87804bf643c827. 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/QMDA62243366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddaf01cd592f3b4fe14fa2e43c0b7ac3d08243325fe8b5f0a2c34d3d5c2d5352. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMDA62243367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce6745d6002c8c92d589ed7b70130887afae1cb0ecfc9c21a5a973a410a68f5. 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/QMDA62243368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556f498fe20a868f001efa9ab88c37aece51a2021c6807c5a367281648c5fcc. 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/QMDA62243369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c915b10984732fb62e5f8679ddac20b9304aab4402932da3fc3edf5844bdecd. 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/QMDA62243370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f84d520f52e0b2d7d672e1455da0cc1c32c75f10563fa126ca543e10a9573. 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/QMDA62243372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c84b5f911098083f92163804710eaa2849316821874dfd38b620b3083781b1f. 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/QMDA62243373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d1d4a6ba470209e45d6bdb960211bd88723bb7fd643a03ca250f6a18e89b5. 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/QMDA62222929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb546c0c1981efa1e272d1ed4c2792d790f98a93033bf77ac90738a840f3f02. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMDA62171408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6f47c0c5bf0d708f670d8d46aa94f90bce11915a967cf0826a17b4223d9eab. 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/QMDA62105401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe01eaddbd635215a72ef8b98a69082d255b2e28526759373c6d8a9bec15062b. 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/QM7282120392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd710a38fbc39240f3c3146fb4db4015f317088f76d528ac6f07244b681bc8b. 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/QM4TW2113607.