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 0xdecde2eda82569be4c29123334619d6a4ecd8f9e5b2dee267d88725fa0f2c4d6. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/979687b6-4045-4441-a31b-829f86f37eee.json and https://artists.proofprofile.net/proofs/artist/979687b6-4045-4441-a31b-829f86f37eee.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 0xc838b62740f25ba8759496f88ed5c882e66c26bf32584c80c4bd465059f23791. 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/MYSW10890207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1cadd215fb4b7705ebb13e41fbbb8a975c6563041f13b9ad1a26f20687fe12. 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/MYSW10890209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896764137fdad2eec6f64d55c9fe0cbb50e6e84e1ae47796f930261db3cea822. 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/MYSW10890205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fc978057ab3d6ad503c3b5c7e1799e7835bb2f75cef856e35d5195b3aee511. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/MYSW10890204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d00c7bdac8647d3e2fba3942522e960f113953e5b5595246507cb46b0eecce6. 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/CNZ331604486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b7f9861e54c1af8d18b7c37ff7e707cb678ee0526f944f0d2add3966eb969a. 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/CNZ331604488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b1ea37189f9ac19c2551f6e68dc7c15574fc0091a75a26d48b03ff641d8b38. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/CNZ331604484.
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 0xcbd33abc42dded230241b3bab715b47b87f1959a9ea7a40ead65e8c89f9741d8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CNZ331604485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba072e183885d80706050f5a8f86b311781cb303bda5d08fd065485199f7242. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CNZ331604560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536d520e638d4891d93fa342844d5d37c37c1391264a647041997755d82965d8. 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/CNZ331604540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2859706737081c70a2af25a66d1c8fd52566102fb52eb32871721e09a1e152. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CNZ331604562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd70dfdf0f43a4d7b27cc06ab4d6a32259120d6c2caf9a1edb60bef7724cb5a. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/CNZ331604541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae0b6cdbc77a6931bace56d8f0ae7ca0875fa0ac24eb84740f822dd80d16074. 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/MYSW10890189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873edf19ba2adb283b1f7a19c83bfd6045366e53d5aba045e286b599abf3171b. 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/MYSW10890187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aa198e97689895bbc5c3c6d41f2067b573ef01c871b8dff4db0563a25b69fb. 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/CNZ331604017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaada759b7ebf26ad28339cc027efac50fc90210bcd7158da2f98da066f4fd779. 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/CNZ331604021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b90ac8799555844f4c1e9005595c351874934c9a3e74796d7492575b18d4cde. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CNZ331603999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287ccefe28a8a00614b944000b91c30375458cefee6f699c693ece02386b859d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CNZ331604011.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1871e4ae7d145921df441da99dc38ae676429d6e389a584e229b1ada95d14751. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CNZ331604015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bf042fdba1e087a42e7207dd425fe57b6e85ff98b5d5bac85d8363985dc8e2. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CNZ331604019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0d1a21c521c26565f5e307c82976ef3a954822ecc686b558f099ec176a997d. 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/MYSW10890383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c29a3fc310f020cad330956ed6909b0be3143a151bb0b8f6290dcb54bd2b229. 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/MYSW10890104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c07398eb4deac1c01ef51bd6f5da5fc2f3a858f9586ad943171313a6b1feff. 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/MYSW10890105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbf1b0038f6f67ea21871e4041503c42ad74d3c9003fd872cf5d128423cdc98. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/MYSW10890100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf627dad7e9f9e4c6b57209b55ce5aa1aa0215e951576a1c969ccdd958c35cbc6. 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/MYSW10890109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6794811693f5d2773d8403cf2f7932855d416f96cee6ea6696bf0418526f50. 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/MYSW10890144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebf2fc61084b8db628d89442573eb07c63db7a6f342b52d87ad0409a56e1f5e. 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/MYSW10890106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8db92b46116df277dbaf08ba1ac58b3bc4132741be8967a1d97673bbc9ca15. 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/MYSW10890185.