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 0xe3998ae91761053ff987191c03ac1e7bba8af07fa42ac9651333a6dca6178fcc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/237052d0-4dc6-4e8f-a570-824c42a49f77.json and https://artists.proofprofile.net/proofs/artist/237052d0-4dc6-4e8f-a570-824c42a49f77.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 0x4d2c095247801f6ae231d67ad7e19938ac4681cb89aecca9f4d39a128901cedf. 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/PLUM72300660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc437d29d87d53bca25ad24244091a522866fbbf9a8dcd589a6635f2907bec407. 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/PLUM72300561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07d81e0086f8845a32149b3bde95ba78327043480bdb5973c9bd248856fe99b. 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/PLT612150002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1a863384ddf665a0d80c14796c437ab2675c60c3598fd6a079adc605240e85. 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/PLC062229564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b184fa37ef588a7fc0b51a3a53eb363dece8442024ea4a5dd6f7936b572a213. 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/PLH342500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cd6ee737e997c8ae43046cb65178b4533071cd635d93d0f7177efcdaa3fe6e. 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/PLH342500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d71ede99814c5aa54b3a3f23f4c7d88beeb7bc0276083a4a70d38d9c2d186a. 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/PLC062112496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18d6f6a5010dc88a4a01541883fb83308ab4b6eda6441cd3a3a13583c87792c. 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/PLH342500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff334a3e6b13c0e6e007bc73d20a4d7cf2ff3c5b903efd29222ef2f6e2ef9f8e. 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/PL41A1800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebfbbb110ccb057295a743e9b12dcefca87c99df3b273401082ee3fc4a2b50c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLT612250002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbaa85378a082027a18edc5c7d18faabd427aadd30021297e1bc9a7d22a69d9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLT612250009.
Projekt X (feat. ML MUZIK, MAKSIM, Jeden, PSR)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367ebf136f98d35e095aca50d87b5d4f2dc68983ccd44493c716eee84d6553b9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLF242006971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b5ccd4b826b0aae1cd0daa94e7ff2ac7ba39105722f34e79e7839fc4e10423. 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/PLA552100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b5ccd4b826b0aae1cd0daa94e7ff2ac7ba39105722f34e79e7839fc4e10423. 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/PLA552100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99f7666c20b85268448c84fb508f856f546aa1d5e4c3e28bd8be80adb880354. 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/PLI292200621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e51b0261eaa6d901509c9a8cf4490634b44255c1a1bf46ed802ffe0f8cf5e8a. 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/PLT612316008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cd7a6bc70fc8a8a975b686c8a38dce93f05fadcb012853c6481c4efba0a9b1. 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/PLT612316012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebfbbb110ccb057295a743e9b12dcefca87c99df3b273401082ee3fc4a2b50c. 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/PLT612250002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbaa85378a082027a18edc5c7d18faabd427aadd30021297e1bc9a7d22a69d9. 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/PLT612250009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b00ad056fd4e4cfbece7b858ed4252d35e963c4879332804c17225cf7ebb9ba. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/PL04M2100002.
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