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 0x6eec040bdba4e02293c21f2db08ae38b374481e87007689f99e9bde1be237c21. 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/65bdbdc0-9c46-4c6d-8df1-a7cd014ab2c4.json and https://artists.proofprofile.net/proofs/artist/65bdbdc0-9c46-4c6d-8df1-a7cd014ab2c4.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 0x629e75fb9af04fee47ce59412220bb9431ec6ec4fe3cb31d4da9e1799b039000. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPW792000681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2850f7ffbe6416ee8ec0ba3e1b172636516f8918bce1ddd2bd360aaab2a07b7. 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/JPW792000677.
和風のリラックスBGM -箏や尺八、三味線などの生演奏-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd544f8fdad5ed43eca36af073fca3f890f1b90e49fe69f23d48e56c2f5ca0532. 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/JPW791900017.
モチベーションが高まるBGM -仕事や勉強に集中、元気が出る生演奏-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7bbe435da515a6a0e946a3c27f5c8d771d7313b8ed5630993aa377ac89cd5d. 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/JPW791900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af9e2cd97b198b455904ea4103068c63bb88db69d0ca8997b400f710f976ee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW791900118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f5c63ce823993879abd6e3dbb3defcd4b31fbf9ce4bb384df35fad94747924. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW791900120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12965523f29575e22189426469629e580567b0289d5391c5ab41035bf47dc81c. 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/JPW791900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34cf833ecaa97c8a189df6f34611bae08ab571b200051cb2ec02cda8de725bd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW791900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f96a9993c7d8d01b1aa3ba95891fd0fda0e00e336d93f92dbd6eac640ca9c4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW791900132.
和風のリラックスBGM 4 -箏や尺八、篠笛などの日本の伝統的な-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6981c5d96e63f1d8f2908107dda9ac7dd2c1e6a66ca326d1d31cdf114d94c3f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW792012566.
仕事がはかどるPOPS -集中力が高まるインストゥルメンタルBGM-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d98482ce656b16dadfdae961ca1a3aa13da9cd9120ab18a2ba60da5ed3870a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW792000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34cf833ecaa97c8a189df6f34611bae08ab571b200051cb2ec02cda8de725bd. 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/JPW791900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1bfca3b94873da39554e2e78a9241a889d0e5d6436a758f18a59d9441652af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW792000055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061cce7c48ea305dbeba62a4f8452916b62f34c4b5b66ce31f797044987764ec. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/JPW792000049.
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