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 0x5643d6d06587a7f324df8cf66517843f8de86489581f92f2d06d1d4a8645fcb3. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0a12803-cabf-4285-a282-b3ee2cd2ef7b.json and https://artists.proofprofile.net/proofs/artist/e0a12803-cabf-4285-a282-b3ee2cd2ef7b.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 0xfe9d821bf1aa0cf4bafb22d00b0f4dfdd3d3419573ece35f2c93ffe2462b46cf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPCO07819400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7d8ce06c46d4829505d88ac10c3852190203be11767798420dca720998876d. 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/JPCO06122300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea7fade5bde87a627126d20d95a8df3042222d28d0e95eece0a4af2f599bc9b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPCO07720200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1025bd80c4ee1a06bf155356ff22dd17e018b495e889c77301de446193754877. 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/JPCO09562890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d202d4c8f2f3538921f57d11e50cf8245986021231ac20ac88626b1eba2bd8. 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/JPCO08304640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c6753007f1012cc7a02d5ba2f6342a132ebb165f50742ee843a60b306f6bf9. 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/JPCO08424570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d62e9f78128044436955190c9e1f0460640fbe75c32787a669c6e28d0774e2c. 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/JPCO08119010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22558c859f3b50b89b147827ce1f923592c45f72e37f2d900f794e73647017b4. 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/JPCO08945622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82e6c64c0110a65911bcd05abdc013948bc01a0ce16059ce578a66181bf946c. 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/JPCO00208870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efc9f9d36703b8987f8ed7a5a987427c64f976f18091cc8660816c0ef912546. 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/JPCO09831800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27fcc8c93bb00f4919a002eda23d8bf330c7acf5fba6fcd7a1931f6ddf14337. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPCO06821870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a35780f9adec4358dce1178e5cdb2a46b36a846d66af30832b69e5747597f78. 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/JPCO06722320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494793e17bc7bbc6f57c42caa360a618f58677a0eccf8e9d92ba8b3d1d6bb4fb. 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/JPCO08312170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ac17d269f981a9eafb1cd2944e050061eb8adae623b3a08f56f3f54b3764c8. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/JPCO07794230.
交響曲第9番《新世界より》 第2楽章〜家路 (冒頭部分)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09e835067abd87098ce48568e1db4ea39e9386a41579bfddd093163014f0d59. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPCO08922640.
歓喜の歌〜交響曲第9番合唱《合唱》第4楽章 (部分)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5af30ac1598cc656f0459b1fc7c11724820cde5ba946b278c3e0549eed80e8. 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/JPCO08922650.
Air Sul G - Violin Favourites (Christian Ferras Edition, Vol. 19)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02d25e343dcee24166ff52d0b8ba10b80bf7d20ff6bc449b0533536c2e38cd. 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/JPPO01507017.
The Best: Music for 0-11 Months Old Babies
Suite in A Major for 2 Trumpets: I. Grave
ギィ・トゥーヴロン・フランス金管五重奏団
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfceb0a3eee6510d460635be713fcaea1eb7d120aa88a53f93c2263aa29cbbc5. 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/JPCO08302981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534ab5e74d5379edb9eb8ce5b33dfc28504e842c6bb1f9658bf66f11e596cf6f. 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/JPCO00107070.
Piccolo Concerto in C Major, RV 443: I. Allegro
ハンス・ヴォルフガング・デュンシェーデ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552b6d7a2bacc89e400f4d2c6f39524820b9c5028be71007a1fe3a9727d31eaf. 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/JPCO08303390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fbe7761aa3bcefbe5eef5403e297c6f4b97f87598272affd1ffb9f244bbfe8. 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/JPCO08402850.
Concerto No. 4 in A Major, BWV 1055: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96823dc71b98a92122b10cd633059beccbf631abf17df854f6492e83aeb2a910. 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/JPCO07933540.
Violin Sonata No. 2 in E Major: Tempo di Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687a35171f9bd3d03c02d3873c0d0e6403a24a0b7e82e7371e14d0c96ace6029. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPCO07720910.
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