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 0xe313001f745dfb3d233e9ddc1c6508f7ce3f6d66ef76ca7544ad66e82ec706e2. 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/a4ce8640-d38c-4be2-9e56-eefa280b765e.json and https://artists.proofprofile.net/proofs/artist/a4ce8640-d38c-4be2-9e56-eefa280b765e.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 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 0x5f40f3eb2747f8ee48d134cd53a218d498c50dbc4455bb641269abff122bc5df. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/JPJ222302674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878651f645564119bace3e3fb6813f5ce6c43a080752bf01e09b6b8c959652c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPJ222302675.
To the Summer That’s Never Coming Back Again
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6537da05057ce469381f047ee70da49886ebfad10224794e6051d73a281a207d. 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/JPJ222302676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff3d5461c38aa08080b17cd4a88e1870d03a23535341c20c2d21da0c83ebc2. 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/JPJ222302677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ae33b3cdf0a5f4ebe8363a2a1f2ee3a3063b6b2b77c603398f63dbab8fd0c4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/JPJ222302678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d93d97e730ce80ef1006dc1ef884408e4be5b8bdf5d0e40a738b925ddb70fa7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/JPJ222302673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf878651f645564119bace3e3fb6813f5ce6c43a080752bf01e09b6b8c959652c. 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/JPJ222302675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6537da05057ce469381f047ee70da49886ebfad10224794e6051d73a281a207d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPJ222302676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ff3d5461c38aa08080b17cd4a88e1870d03a23535341c20c2d21da0c83ebc2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPJ222302677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ae33b3cdf0a5f4ebe8363a2a1f2ee3a3063b6b2b77c603398f63dbab8fd0c4. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/JPJ222302678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9087e4a41c7a7cbce7b4763a0584b703d6d4fba304f1739dcc6e27e5ce6ddfae. 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/JPJ222302733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1bec82ee31f9cae02ebb56875ec1e7827d85d74a43f9a541a056a5b9ff8a92. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPJ222403087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a86e079c6f44c6662e56b8898a39209b0844f458416a9cdb191825dff609bb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JPJ222403084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae116f5ea5a70f5c38d3889a8e464238d7172ab88eba1fa0d9559b93ec51300. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPJ222503570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62695d769ed8398d2264051d90731279f6c25ebbab287b3a00889c3e522a19c7. 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/JPY392401771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5cc393d9cee7872ae5c51e366e6943cadc9565fbf92d288c34256e74e60157. 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/JP92Q2302045.
この命を響かせたいと思ったのだ
音楽的同位体 裏命 1st COMPILATION ALBUM パラノーマル (vol.1 残響のパラノーマル)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42778c36c1123f4f219546c52a067e9332e17719f967ac4ae0c8ae94926eeaa3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPY392200559.
Project SEKAI UNIT IMAGE ALBUM セカイノオト vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf451618c31c29c59a293e7083dd62c4d29cfe950f8844713dec8ae93c3274a3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPX302355410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdba02c6310be3cc68886abc0d97d1650ebea0879578a00d5b3c21eb17e8eac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPU902500987.