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 0x6063554396dea99c421aab7445f4919da33b9539691ab7c9580b5d799cecfac3. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49379e45-f5d6-4cd2-bb77-8f23a1b0b112.json and https://artists.proofprofile.net/proofs/artist/49379e45-f5d6-4cd2-bb77-8f23a1b0b112.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Opening - Bombing Mission (From "Final Fantasy VII")
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 0x9c24468271f8dddc2012935b4f95b79e81230241be275b61116551f75394f3d9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029349 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1842f68c73b1857e3ee79191b21f959e12703b15cb87cad6d0bbd58032dff49a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029350 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3387af3e8185dec20cf1e7e1d95046e23c5d62ab0765f0c0547d600c1254bf3. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029351 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a88153c2dc8cfa69b14fb36a238c243dfc2fc02023b84ef76052987a4ddef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029352 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38123264f0256a8b39f9d78b8dc576dea826a5c875fecb95f2ec733ca43296a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029353 — a six-check JSON result.
Those Chosen by the Planet / Main Theme (From "Final Fantasy VII")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba3e892d92b4801202b6b4644067d67c6340afec448031c39928e1c4296a342. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029355 — a six-check JSON result.
Let the Battles Begin! (From "Final Fantasy VII")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc77f623aaf87dea32673bd4c1d4357ec0181442c5977ac01a5c1025773a72a. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029356 — a six-check JSON result.
In Search of the Man in Black (From "Final Fantasy VII")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2660e7aa2e000c5ea492f2269524e22c5ea2653ffc27feec8d95e6c91f4005c8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029357 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ce63081993482b783f0176f86a7fb2f99e831500a6587a0078d4467eedd996. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029358 — a six-check JSON result.
Listen to the Cries of the Planet (From "Final Fantasy VII")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0453889d60aa93578e62206c3619fa8970008decf80d6e90dc1fc9d5928e5c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029359 — a six-check JSON result.
One-Winged Angel (From "Final Fantasy VII")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dca975f550ba16f9d8d83c894ef51ed36503dbfffc47e5780f2baabf4c4431d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2029361 — a six-check JSON result.
Torn from the Heavens (from "Final Fantasy XIV")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb50b34fac418b9af5b7babe3bbedf784fb32867898872a2ac99e1446b297c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451053 — a six-check JSON result.
Tower of the Magi (from "Final Fantasy II")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187cf9da6ad566ca9413f241ccab0f5fe22f34c68c8b11b5b230ed0a7efb65c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451057 — a six-check JSON result.
Combat (from "Crisis Core-Final Fantasy VII")
Horrors of the Night (from "Final Fantasy XV")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7281fd0932054d4b8af5461194bff4eaa37dd535491a83358a3ede38016a30. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451052 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb50b34fac418b9af5b7babe3bbedf784fb32867898872a2ac99e1446b297c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451053 — a six-check JSON result.
Swords of Fury (from "Final Fantasy IX")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3712ef70b7b747fd544c1c679cfe4570abe647740154b77f5a0cc208cf667d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451054 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6ce04e84e2ca1eb8129c54f2a50c96b6822beb856c6eec7d5fa08d28b0088b. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451056 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187cf9da6ad566ca9413f241ccab0f5fe22f34c68c8b11b5b230ed0a7efb65c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451057 — a six-check JSON result.
Lunatic Pandora (from "Final Fantasy VIII")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e5000575f4a1b6a9a29b2ea64db7255ad5e2457304d6c3239cfd51426211d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451058 — a six-check JSON result.
Kingdom of Burmecia (from "Final Fantasy IX")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c4ade320b1a09a2601a07801a685585951080b74aca88fc7b382c6a34fb573. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32451061 — a six-check JSON result.