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 0x9a871b7fbdacf4b34407d3b50e5a19ef7e0e0cdaa24f438d8bc31339ae7ab410. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/921aef98-1b23-422a-a8ec-372f8deb61f5.json and https://artists.proofprofile.net/proofs/artist/921aef98-1b23-422a-a8ec-372f8deb61f5.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 0x0482839806e13d03f01bb602436305218fc7baef37c6324eb95cb142441d473b. 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/JPG531600871.
Dai Uchu Ongaku Sanka No. 9 -From "Symphony No. 9"-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3c4e3ed75b1b362bebe676c1bff610ee67c6ceff6798798e77e32f23b1a695. 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/JPG531700906.
Muteki no Sonata -From "Symphony No. 7"-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9bf90c2a626753f46d081fa37352066dfead18fe282f08f7c0e8f68e243e63. 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/JPG531701105.
Unmei, Kuzureochiru. -From "Symphony No. 5"-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6423429024d8226b8021aea16694357a795b71438d65f92ff5aa796afaa05ebd. 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/JPG531801229.
ウィーンの調べ 〜華麗なるコロラトゥーラ2〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b60a6d33d6cdc42951b46f6c183c816e627df1a312b677433aea9bf89b871c4. 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/FR07X0000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bff2222ded49b33a9e86a495c4b395696bbdc9193a676a5515872ccda6dc548. 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/FR9W11110235.
ベスト・オブ・ハイコロラトゥーラ
私の感謝をお受けください、慈悲の人よ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1370da63846f6749d98cb4319e3e6bf2495ea838152b28dedee74c7d26430f. 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/JP92N2399350.
ああ、なんて美味しいの、コーヒーは！
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bac894937c6904d13fb221b20bf178a59c74bec8164c11115eaea780c75862. 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/JP92N2399353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc9db83a9efd1720e85011243f3a8e1a3231ce844bd744dc49c961401dc3030. 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/JPB601404053.
コンサート・アリア「私の感謝をお受けください、慈悲の人よ」
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1370da63846f6749d98cb4319e3e6bf2495ea838152b28dedee74c7d26430f. 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/JP92N2399350.
Camille Saint-Saëns: Duos pour piano et cordes
Sonate No. 1 pour violon et piano en Ré Mineur, Op. 75: Ib. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43080c422b0b8cdbcf74b3740984fb1bc931f641ae68558af0139de874b31aec. 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/FRP812100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc34a1586e144df851f30966fbb337200630a28fb9b4835515ea8c17c00820c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEW741603021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2a0c9e24d2c5585cfe5263c4073ddf7207c26e96999f7834e0f76a0d603df0. 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/GBWUL2323490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6329dbaec4fb376011c573e38cd6ba656787c7004f30ccfa30331ac560031e3d. 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/GBWUL2323583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca227d5eb8b2325f4f60d67d42ac4e4e5c6ab10883dc1ce2b1ceeb526262718. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:17:29Z), 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/GBWUL2323610.