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 0xa06d4ace403f77cdba102333c24846cc7e08a733a920cb442b4541ee643d0025. 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/cf994da8-1705-4df7-aa0b-ff8bf295bd16.json and https://artists.proofprofile.net/proofs/artist/cf994da8-1705-4df7-aa0b-ff8bf295bd16.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 0xba5ce486854226caa0792a56d109d4738c8e17287c9c1b2e754490ffa0fbbf36. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM81922154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56d30596253b60fb84283c0d2b9b933c9f1802237252cd789b6df4d313f4a59. 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/USHM91715343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4584aec4cb47911a0a5251694c1479b09945a78fc7f96f9c9593cadbc730f2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM91717815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4460936235b7a21cdf19368bf5c62344e087d837052f01cb94f1f6fb13187c60. 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/USHM91717818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f91a7564cb5bf055f312f0ecb1ddcce4cc3f220b1a1cee1bcee8afe009471bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM91717820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ee9888e829ebd3fa24ed052d3a0b488c0690bd49399278fc909381ef802463. 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/USHM91717821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4c1dfe42e6e3920565efa9235489389b8bfebf3ffd27dfbd2d049ac9be90bf. 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/USHM91717822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd8342876c65591cceca50a42ccfee23044c07dd2f06c101a2311ed500df8ee. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM91717823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667a22441bbb70a87d292c25af27ddef3ef518fd493994cd672ef8565593eb6e. 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/USL4R2040681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c26e4adb74024ff39b7bed813451d53e8aede31f68c5286adefea257849e0f. 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/USL4R2040682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719e3d84da4f8ea6cf7565b205c1f7bf6d82801f1f53f6f498e556fa49cc1cdc. 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/USL4R2040683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fbf77b5aa187b93244129f0ce62f9364dbf1b14d9bcf46360d9e4bedfb7036. 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/USL4R2040685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f1164bd50594b28f06f2de14e97b90d214013978306aaa0f2dab56609f516f. 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/USL4R2040687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d04985419a2f1cb627e2113f8486e180fda369616e9fbb2b76f51a7375672c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USL4R2040688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f71523baab588a1b66556b2bc7857c0fb450826ea4dac6bb51273d950fdfc91. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USL4R2040689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a6d634967551e4d040738daa4e1e462f91a60c519ffb61ffe99df35ea96ba6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:28:41Z), 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/USL4R2040691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802e29b516fa785488ab531207119fd4a9991aa874cd7cc2a3bc124805af265b. 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/GBHYU0900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc723f5c04feab51f88a4cd3becd44ba3b1be453805278dcb85404636985986. 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/GBHYU1200003.