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 0x15753968a194e39833e0756e0af0b9c2adb76204bce962e5032f146f54b7e7e5. 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/60adcbb7-01e6-4abf-b391-3442c9424c04.json and https://artists.proofprofile.net/proofs/artist/60adcbb7-01e6-4abf-b391-3442c9424c04.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
「おかあさんといっしょ」メモリアルアルバム いっしょにうたえば わくわく ひろがる
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 0x5303070fc99a268b60d28a710c9ca4d6829e161c6959f900fb540ed04d79dfb4. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/JPPC01600726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c53f0d2d9cabeb147b7ba8bf65a326613c3c7710aa937d070c1762b677300d. 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/JPPC01700566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c66cedbce574e3e5791435ddbde4f531ee0c4299d842ee90ccd89c08aa8371. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPPC01701325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbc74531b53f6f2bf9ba152257ea50921529dc3bcae1b979e45f656ef4ec629. 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/JPPC01701980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956fd4e9b12974ed9162acfe6e9a7687565b5f32a7c6816f61d07049308034e7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/JPPC01900091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51423cf879b3b013b63cbb59f3ed1ce3a381b4ec426e2499be305d4cd604d91c. 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/JPPC01901467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8122e0b6f560636be2c6119736c5b4a49ff48547bcdb17dc6bf7f4d95b6ccb. 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/JPPC02000783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9d571470c54daefabb8f8227d476b021a136eb86f20070772b4b3d25fe6e1a. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/JPPC02001876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b59987737b2e0d7d5e966653fe55250bda9c316a12c1eb7c322d7d0a4e3170e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPPC02002016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7849114bee4a93b76f49eae4e5bb22277bfceffc94e3083e577e17933ab8cf8a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPPC02110091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb80b109da6049f5a280d40dfc8e9458e88dbbce4fad5f0417257bc5eb44644. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPPC02211214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9da92ddc252af1d9c31e78c580054f3283b4af77a7b52d20b0ca067fbf21b4. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPPC02111012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f94a854c4f1fc47efc593024683b573ee21007033b934cc6ba2c2ebf5dae387. 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/JPPC02211215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a2a83d30be577ca3081f3bae1405e38589497c3ddfc74277761737eae651c. 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/JPPC01701986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15edfc3e84a1ecd7fac15b064d460372bd23b07c563475bec85ccb7e609dfb4. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/JPPC01600727.