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 0x61177c069a215f08b88f67d6746b77925eced67b3c58ce81d740b36167d649e0. 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/391b9c1e-2960-4430-82d2-c2ddc7c54ba0.json and https://artists.proofprofile.net/proofs/artist/391b9c1e-2960-4430-82d2-c2ddc7c54ba0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
もしも僕が死んだらこの世界は変わるんだろうか
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 0xbdabeb8a2e0c4b163398decae37fc646404ac5411594c7af1c472cd89d2aebfe. 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/JPPC02100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2031358f150b026d11df310b3b920a5319316938e0641cbd4663f50a42eba851. 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/JPPC02110592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c3a2a91ae413e49d44babd4a1c5a3f3effea4c75df74a0b2df87350cbcec3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPC02110593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a4d8b8d66ce4cc4fa7ef709474a9eb9a625f18bc48d2bc2671b46d0b3cc4df. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPPC02110591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2c3a2a91ae413e49d44babd4a1c5a3f3effea4c75df74a0b2df87350cbcec3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPPC02110593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c19fed8c6659d19e0d7f5427bd749ad60b44e9004f32eef1076d5ee05b30c91. 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/JPPC02210326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd88fa3e5eee1b80b5d95bbd8ee2e48386c2b6593049d6ea98ff17aaa44f9c63. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/JPPC02111879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd28ba8b276eb739846dafa9e9b2f86131e303d1127ccbd365d6240bd2306462. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/JPPC02111882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d9de9338f17e201f2288b5ef7639bc8afc8f17946f5fa6adf6f33fdb1a3dcd5. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/JPPC02210327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88a60cbb70f67fa88f664d667f5c91d68f8009223a4a9e0d74d8eacbb71c4b1. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCJPB2498210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55f8e7669674213e5d78927c70395d111c0c51ba1f76af7c6f35bbf40980dc4. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPB2498215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c9ab747a40e1eebadd5ec0eac763abe3a283edc01366345e8ec3a69a6ed17. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCJPB2498212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16726b1748976e0e2b36f834941269692264d599e9188f8db4e70786544039d7. 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/TCJPB2498213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc07f8b5cd1d8625cfef5a776da641ef0380d1d88a2158d3739b624b1f7495e. 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/TCJPF2570431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7057575462430a1a6f57afb9134647989435bd471064792df7a8e570bf8c4e41. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPF2570433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc07f8b5cd1d8625cfef5a776da641ef0380d1d88a2158d3739b624b1f7495e. 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/TCJPF2570431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4af521aef587d5b67e392c65b9bd4e3da2401524bd7839ed583b8f47812282. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCJPF2570437.