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 0xb1166025f5b68f319092a493f5f7dae01dd79ef11f7c9869868aad14d32d6647. 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/57a43a93-6574-459e-ae61-7757918d0d85.json and https://artists.proofprofile.net/proofs/artist/57a43a93-6574-459e-ae61-7757918d0d85.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 0xfd9de2e6e2f38e6351126232a52eb7519ca736a9c64fb4552faa96005d223d29. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZK6N2096002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2955d0d6e92560adaecf55b7957d7b4be160e8ad404290f3756f148231e4bb19. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYZ2371538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e24ed7db94649854a5fbbe45f138ed89acdee42d97df320e3af29a42a897f72. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFYZ2371540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88469c41cf646d8856d9679ed7d1147e424e30da1bf52908fa0130befe5bf5eb. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZHNB2372444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b048647327a3907b219b7a8f2e2239822d9aa9367001798ea12dc91017cf7e2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZNWV2481057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1dc5dfd1cbf9ce75628d848dd0dcb92283c499609cf27ab0e36e3840b8d03bb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBD2424792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb83a7cb0f3d44bbb795f0ac1c431e1c85599c1904d08c60e10709f56e4ddfe4. 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/QZZ7Q2400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd05bfa700031c7470095e3f3f8d4720af3edd54ce9dcea80a53bfae27d58680. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US3DF2538668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782d7ddbad837cccb6805f8c55cd0c2a34d9e32ee096b1b2748f5ac95047430. 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/QZNWR2555379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83f3353651ead11ab9452af1dfd00455c079f15e54370b0df843e4454480101. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/US3DF2560096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aae3cc2afc34d42a81dc745d01ad5952b65ef0bc65dbe3bc17182eb5a11dca. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/US3DF2570302.
Provisions & Promises (Outfitter) ~ from Final Fantasy Tactics
Fates Entwined (Character Creation) ~ from Final Fantasy Tactics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac48b6dd75245f3e60df4232ff64500fccb6b6c544d67eba3ee93916e317e89. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USANG2512976.
Stained Glass Silence (A Chapel) ~ from Final Fantasy Tactics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245810426dd5b27b1a978eadcf5fbc47fa8cb27760b4c1b34306ef3cf719a84c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USANG2521471.
Silent Hero (Ramza’s Theme) ~ from Final Fantasy Tactics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c06b2c20decbc3c501397d39b3c13b44e7d0a865498cd955af0940d09ae9be. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/USANG2521472.
Shadow King (Delita’s Theme) ~ from Final Fantasy Tactics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f20479d4a64474ca93ee090b737837bf9f88fdbbf436f524c397ece654b6de. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USANG2521474.
Lay of the Land (World Map) ~ from Final Fantasy Tactics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff6371e2895a92b302a1d7aa46e96c6867e98befbfba7164553174281fd71f4. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/USANG2521476.
Lines in the Sand (Trisection) ~ from Final Fantasy Tactics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b109a54a2c77d227169178a509b8540d99bdd853fee524268ad41de189b65d9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USANG2521477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdadd7ba13f71944ceff35f61b1924845881f87ce6a6a0cce316c7d95e24d4d. 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/USANG2512991.
Whispers Over Ale (Tavern) ~ from Final Fantasy Tactics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d082ca75d66d77228787e962d8f25d8e4f6e122d49c46a323cec9fe6af6f9ca. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USANG2512963.
Ashen Resolve (Antipyretic) ~ from Final Fantasy Tactics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf4162adc08fcbccc3f8c674a712bc508794300764a243536a8a622cbfe72c7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USANG2521480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801d6bc04ad3ede30ab5829b235c6db0afb559e3e0ce58468f2e3b2f9be9bfe7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZPJ32514068.