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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf13f3bd99a96dd2e385569ae85c55acf3d4115a3fbfeda31e5ad1d6e37f499f. 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/bc03fc6f-3299-4ec1-8385-4fe308263798.json and https://artists.proofprofile.net/proofs/artist/bc03fc6f-3299-4ec1-8385-4fe308263798.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1091827ffffdd3559ec65c179d7b90dac3ab07a794a517e294a33f156f8b16. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPS2212662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fcaeab76e2b38caadeb2a23b0055baf9f7cb05e233fba26b2ddf0f1c24a52d. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:54:29Z), 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/TCJPU2218507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9211da62c280fc54bde3277946f0875e4eb3eafee4bbf9a37cc769a3ff08b35e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCJPU2218505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b68195c40bc444fc6f124f7ddf5e25b3de1b1316216466c9d421924fb66979. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPV2301559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0ccf049ce132f540a1d13cc4fcd63f1d155633e711c280c4bc0acde9f09845. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPW2312880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e3add056ca96426fdf3249ded3f9d449194030aed609b9de8274db2a602a6d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:40:32Z), 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/TCJPX2381101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897ecb35116d9190e7f080af99b3f557284efdd73a363e061451dcb483c26153. 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/TCJPC2462784.
The Girl Who Leapt Through Time (feat. tabehiro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca3d013b8533e1e24a10f406524e185c4080c5743c593de8e6e189630690f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRMIM2468964.
The Girl Who Leapt Through Time (feat. tabehiro) - Acoustic Version
The Girl Who Leapt Through Time (Acoustic Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f5b256a67c00cf7e8d769776d136754e1edf43ef83d4f4a79189762a9287b3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/KRMIM2502738.
The Girl Who Leapt Through Time (feat. tabehiro) - Acoustic Version, Sped Up
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6320f9469edd752f28712b0109e77b04bb6e5ddcc4946db492e0b37d9adb85. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRMIM2502739.
The Girl Who Leapt Through Time (feat. tabehiro) - Acoustic Version, Slowed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ae3fa6a16da944c1f3e3dbcc7b234230ac991198fd688887e06720ed7ea683. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KRMIM2502740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca3d013b8533e1e24a10f406524e185c4080c5743c593de8e6e189630690f9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/KRMIM2468964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103f9ec3828940cff657b362353d2c6d6d919d861b4ccb552a3785f5eaf1ff42. 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/AEA3A2241420.
The Girl Who Leapt Through Time (feat. tabehiro) - Sped up Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3521b2fbd51c4a7a020b160167a036378f57431c0c392da491c2e94eb9c27fa9. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/KRMIM2468965.
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
The Girl Who Leapt Through Time (feat. tabehiro) - Slowed Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6c47dbe69df3a7177d9dd86e3c0bd3b3e6bfe490e845fef5f9f91c1296d5af. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/KRMIM2468966.