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 0x20913ea09eb232cfa794ddefda6062469df78665b572fdad120518b7bfc8efd4. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea009b74-1b63-444e-b2f9-92f254ebd6ea.json and https://artists.proofprofile.net/proofs/artist/ea009b74-1b63-444e-b2f9-92f254ebd6ea.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 0x1149f08ec413be2f6e194205f6dcb6c4a38b1dab26029ad21c65622143f5ce50. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG201922326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcff63d65433d315a3e2ac3d68049ec41107454d8a91585f838680b9fd667cd3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPG201922332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e64d5910dbf606488be4ca5545175ec9bd5fdc2115e4acfad3aab8c2b4401d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPG201922333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1426bd45cb2d1674583b938cb5d5e460f4b3ecf1e94ecc7a9e51432726a3fdf. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPG201922322.
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 0x903030ab26fce086b2da2373443c96308b038bbd1b71f6936ccdbe77662586de. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/JPG201922323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19682d3a83e15291b9e2f6b4e6b32b3af926dd296bff574fdf90e61f4763cf51. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPG201922324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f79eb8db1a1725ff49f5738af625c1cf95e8e6d83a2d8ff2772d18ea938925. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPG201922325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3146024afdf36812279a3a0237165273a5b3b5d5b0db2bff7481a350d2df72d5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPG201922327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72700cd201699fd39917625b5b7517d72e07702fc4956b6d1fa56eb205deec29. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/JPG201922329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4d021095614a9b0e3c4d2f14c2d1d6f4877f7ad062c8979e8398a732bd3f42. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPG201922330.
ファンタジー・パストラール -20世紀オーボエ作品集-
モーツァルト：オーボエ四重奏曲&五重奏曲 ほか
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3be9b3b3e4765dc01fac1280613dafa9892eb83f13b26bb8a53a6d6f852c109. 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/JPG201114877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6ffaf7a6547b728f5e3d08f8b84740e4f25071fc38929aa061b7714733a715. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPG201114878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69907c2d2b96f386cb9b6b1586ad3892a2e0450cbaab144acbba54f62c2a5aa7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPG201114879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89aec702ca3d61b54574e8d49e0185d2f849b2dd53bd7f218bc9616e975fdea6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPG201114880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d700cd67fe4bbafb3a2c8770d412df858e66514520724a1a50675aa39260f1d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/JPG201114881.
オーボエ五重奏曲 ハ短調 K.406: 3 Menuetto in Canone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bda9376916458bd2d651b9cb72e0e59a2934d47655be4559a0ce51fd21230e3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPG201114882.
スイート・ロマンス 美しいロマンスの花束
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade14f758655170f7db812eef59ba13346f8dfb4a5a38d9e984c6e58a914f8d9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPG200911938.