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 0x203469c4db77ed39960d10eccfc4e31e420e9393d92530918633232cd6c05f2f. 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/ea8f6dfe-1c6a-4ccc-9cee-397b7c51a9d2.json and https://artists.proofprofile.net/proofs/artist/ea8f6dfe-1c6a-4ccc-9cee-397b7c51a9d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The World Emporium (From Whisper Of The Heart) - Guitar
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 0xdb9cade71786b2501d0419e23c6cd9edc0de06a0aaaa09c9035e013a2c51b2f2. 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/AUGBT2310526.
Lady Eboshi (From Princess Mononoke) - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513682b79e28315a4086f3c2128b3baa584987ba5df02837051b285119212cab. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUGBT2310538.
Jeff (From Kiki's Delivery Service) - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f28574664bb04b7c0900fbc416ceb88e5d4db0166b616eb518c767956ef618. 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/AUGBT2310539.
In Loving Memory Of Allie (From Ni No Kuni: Wrath Of The White Witch) - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200829be09681d1ec4f2865cc107d23fed90bdbaeb3fcedd108457165f70dc02. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUGBT2310540.
Discouraged Pazu (From "Laputa: Castle In The Sky") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff537d0b7f29ae925de23c6261c916b078dfd161907cace301feae8f0d9a2dd. 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/AUGBT2310544.
A Message Left In Lipstick (From Kiki's Delivery Service) - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a21167cb2fa5911b5bf4b689831288df6d05506b43410962553847bb3c0e97. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUGBT2310552.
Reminiscence (From "From Up On Poppy Hill") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a491df624605cb80c3b973723b11016661a0d81d9a6cb85f80e18dc10248294. 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/AUGBT2310573.
A Dream (From "From Up On Poppy Hill") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde19ba509ee5ebece584664042cc6e473726bdbc48c06199a4a2475e7022e329. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUGBT2310574.
Departure (From "Kiki's Delivery Service") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9ffe26daeb9b616ca48e2eeb5fa1e86aec55f37882108038742ac01c9bd76d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUGBT2310575.
Marnie's Song (From "When Marnie Was There") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e74036afe33c48a6553a6a17bd0798dc00f57e7b1d10a548957e952cb59d438. 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/AUGBT2310576.
Sheeta's Decision (From "Laputa: Castle In The Sky") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b20b7f87c2d3511e71e77ff8e156eee535da4b5002bec554f015431a74e5661. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/AUGBT2310586.
The Oiwa Home (From "When Marnie Was There") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9e2de9c319480ab1993b7216420e6b3248914834c6d41ad6a07440e04b089c. 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/AUGBT2310587.
Toki Ni Wa (From "Porco Rosso") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa974f35cb5371f713ae6679cd3d0fce373fd1584eb651674540e76201701136c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/AUGBT2310588.
While Cutting Tomatoes (From "When Marnie Was There") - Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938a665032d8d4d14c8cc4c77c12c3dc7f4c1d2e91a8e9eb17dc8cf71a150980. 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/AUGBT2310590.