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 0xfa3be1bf85716d2a05d1f55da951d84a223915bf4d8ef3ab3c558aa135a28c8c. 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/f8ddb29f-0852-4cb9-9bdc-b01560c0b146.json and https://artists.proofprofile.net/proofs/artist/f8ddb29f-0852-4cb9-9bdc-b01560c0b146.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 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 0x72f05c39244b40d52dcdf139cacc2c7ead45b16a22db5dd60b8502ddac0e980d. 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/USRV81600388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebbfe93db49bc66ad3ea17e8bfba7bb49feaddda56518129b7d0b6da09b7b5b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/USRV81600638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb2effe0d49e7a064ba6f0a2db5a27813c29245c0a3ead0f29a32b16a43f7c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USRC11801072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9b61edaa6bbe0c51d454fc97c19cccbcfedf0a4cf2f44fc8da1d33daa7cd45. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GBKPL1959546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094caf4a14f66157196bc980adfd7b8d123cb8b5bc74321e61a699994836c7c3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/ZZOPM2106018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfe03b1333a4cd72c56caed13d4c1ed290c37407cfc9a64ec3695842ec9b5e8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ZZOPM2106016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a48711a7d7246ab49cb4c94a94a8f8f2bd3a76fcfc728508d57666d2ed2169. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZZOPM2106020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467477f059e6cfff25f4bb276d5d20df77862aea40d34ecf195108c45a35a675. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USYFZ2212301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bdf694208d2f70c616243e1e7726e4754c9885e318ed1c09b419b699c3b525. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USYFZ2322803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467477f059e6cfff25f4bb276d5d20df77862aea40d34ecf195108c45a35a675. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USYFZ2212301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2c4c09ecd0f8118899ecfbddc0163cb249b98153f09a994d6ce0a99e18fb2b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USYFZ2322807.
ALL CAPS (feat. John the Ghost) (Rock Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8ddc562297a21b334a1c597cf40dd8e23681b98904bd2a47b2b2421f95a13c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USYFZ2351001.
ALL CAPS (feat. John the Ghost) (Rock Mix) (Rock Mix)
Killer (From The "American Psycho" Comic Series Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb77668267f1c00f14cea9032bea9aa11eb575d3299ff012455a4e1c837e5159. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USYFZ2425001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba42318cb47465abec6d8432bfe65b1f669f7b276a0dfbd646834ca2f1d3a6c4. 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/CAN111900454.
American Psycho (From The "American Psycho" Comic Series Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c347c9fb2a74d0c70a7935ef4725e91dc8df1b561a8a9fbd425060ad1da936c. 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/USYFZ2429708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ec4136f93310ae62ec96fee441c0314836b91b9c866adfb7f9a732054f4a0c. 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/QM24S2501016.