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 0xc5ac4ad6973d6e69de112d5aa1c97170e8a6a1a5da46dc5115ee5ce68b75aa8c. 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/85b4da03-c9ef-401e-a999-09e4c0098968.json and https://artists.proofprofile.net/proofs/artist/85b4da03-c9ef-401e-a999-09e4c0098968.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Final Fantasy XIV Guitar Collection, Vol. 1 (Classical Guitar)
Pilgrimage (from "Final Fantasy XIV: Endwalker")
Animal Crossing: Mírame a los Ojos (Classical Guitar)
Final Fantasy XIV Guitar Collection, Vol. 2
Octopath Traveler: Primrose (Classical Guitar)
Dragon Quest Guitar Collection, Vol. 2 (Classical Guitar)
Final Fantasy XIV Guitar Collection 1+2 (Remastered 2023)
Saltswept - from "Final Fantasy XIV: A Realm Reborn"
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 0x59084e10c5304ce6c21dc09fedde10aa4243de3a98c8c6102d3b31f507516900. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32228054 — a six-check JSON result.
Dragon Quest Guitar Collection 1+2 (Remastered 2023)
Melody in an Ancient Town - from "Dragon Quest V"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a88969a7dffb027f804f36051d93db9d694a0c6ef09b7133c7cffc355809db. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32227960 — a six-check JSON result.
Lovers: Animal Crossing Guitar Collection (Remastered 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf593bb956c287774797ce3dd40e75e179f7c043f8a312a25ad80d4c31e006411. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZPJ32228211 — a six-check JSON result.
Harv's Island - from "Animal Crossing: New Horizons"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a0f3024e1a0164eb702a0b66ef43a71ca1a0624e36fff918dea9f211a63aa9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZPJ32228212 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4865a4e74f4d33001cd86479c0c342abfad78b4bd546bcfc0fbbfe2d1cbb425. 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/QZPJ32228215 — a six-check JSON result.
K.K. Bashment - from "Animal Crossing: New Horizons"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d28752c4b49cdc8db5024e2658fc4a5b15f1c5a36ee3b13a32ad0a68ebeab2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZPJ32228217 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cc62d250b3695d789712f94a41ec8eb594afe498eb36b839935920ddd0076e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32236883 — a six-check JSON result.
The Fantastic Thinking: Maplestory Guitar Collection (Classical Guitar)
Favor (from "Final Fantasy XIV: Endwalker")
Dragonsong: Final Fantasy XIV Guitar Collection
Hikari: Octopath Traveler Guitar Collection
Bouncy Beanstalk Walk - from Yoshi's New Island
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789386b5997fdc1e60c21cae963cbebbbb6a80d98c628fed92bc35bd7ad22087. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUMEV2388721 — a six-check JSON result.
Zelda's Lullaby: The Legend of Zelda Guitar Collection
The Nautilus Knoweth (from "Final Fantasy XIV: Endwalker")
Drivin': Animal Crossing Guitar Collection 2
Heavenly Flight: Dragon Quest Guitar Collection 3
Xenoblade Chronicles Guitar Collection 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ebd7dfc5214f59b01c3f382d4e5d616fc7dcc20dd19aa3813374d06e09fd43. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZPJ32413643 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c78e7e2314e908ea53d3542ce34fcae307da67f19f9eec79bade50634b267e. 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/QZPJ32413645 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3334f635fd812189223c4e2cfa658794851418373b51c077e851682ed91e32d. 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/QZPJ32413647 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef214981b6b6e34f2e041fa754ae2033e878b1aad1ac097efbf427b7b110375. 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/QZPJ32413648 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c22fb38fde4eff2b1e793dd7bc876041d25668d7bb56ea174ba5aa54b826d7b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZPJ32413651 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e39abf5e5a1fa48830ca10d6c8ae2fd7453ba458444eb6a0e8c32d4c9b1e1da. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32413655 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bec4f9d88efc839f60c009c50c771e95421f4f98028a48e4967db5e1e9fa18. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZPJ32413657 — a six-check JSON result.
Dawntrail: Final Fantasy XIV Guitar Collection 4
Distant Memories: Dragon Quest Guitar Collection 4
Cyrus: Octopath Traveler Guitar Collection 3
Stroll: Animal Crossing Guitar Collection 3
Frozen Link: Maplestory Guitar Collection 2