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 0x57b285697690f7fd60f7f1e19fd66e7d00855aaf8bf016450b5c2f2cebdaee74. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2178738d-e346-4af0-b01c-171b155b207a.json and https://artists.proofprofile.net/proofs/artist/2178738d-e346-4af0-b01c-171b155b207a.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 0xd7e5c6eefee2098ee981327236752522511041911533c9263823a2be472adaa3. 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/TCJPZ2413658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ec3a1c88fb404e7a6e13233bc60ac53b5290675727b6c1ec3f010b2daade3d. 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/TCJPZ2413660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f21b579ce81202ffa069b04f6bf71469cac2513c7f609af00653f7e0b6baeb. 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/TCJPZ2413663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dd2698910a0a2756526228b2f8d1854eaecd31698826bdd954f382be12a7c6. 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/TCJPZ2413666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79146f44981323ddc5c8402c0a985d98896debf3f237bcc2b5d339013e980c77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCJPZ2413668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe3ddca05ba76cfdf20616be8209a0d5a5c7fa87b6020d3dcc3886acf980ae1. 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/TCJPZ2413679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fc06b25a9df71a09e29323080652eea7c6a19d196aceb7b4cc3a9c169e0ca1. 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/TCJPZ2413689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80875230d03486ebd388231dbef54f2a264aea64824a1fdcf0e3462885a34d9. 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/TCJPR2277806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009b9a7d4d6e6a8fdcda290b2e34baa9e5c664c6e532b25ed1c45c13abadba8e. 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/QZS652262437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5fd520191763462277f92d6a3f3fb06d90beb05910b9fd8fc62da8674e0eaf. 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/TCJPX2387509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f6ca9b8e48205e9bb8aa38e2a8660e036e365efd2ddc7ca22a4ae772f7593. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCJPX2387516.
B.B.K.K.B.K.K. - Yuta Imai & anubasu-anubasu Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2da506fdb30c9d061751cdf29cd5cfd760732aa629f28b1ac289d87bd2b33c. 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/TCJPX2387519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63f2259fd8ef44bf4df8b85c0b25b8926d9d42ed8f1bca94fd5a56674e4bede. 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/TCJPX2387522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe581cc86be86cab9fd332b1a15cd662a3f97cab2888c3fc0c03f206b60e576fd. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCJPX2387526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f7fdcd1f48032566cd4d49ea494141ce1290f5ca916a784bc8e0aaddec31df. 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/TCJPQ2296421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0aa6f5826b09cf23b92223ddc1a9f5a9e629d781f06b506e684b6735746a90. 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/TCJPQ2296434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd6dd98d5ce7e678da31d44d61f92f5332c3f3e1fa7e1853582c5ac9c78ed05. 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/NLH2L2100105.
Hardstyle Universe 2022 : Hard Knockin Beats
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6d126ac7edc4ce2191c22221a7fb9d1ff581837abfe08567ee412e954efd03. 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/CAGOO2051906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bd58538af3d03ef11a49d50b13879f3c62eb30eb347cefd09691396f67d031. 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/CAENV2109950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3d16cce19b51365b7cc2e46f9200b43cb06b0f804d5407bca3652c87c2a6ed. 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/CAHQJ1984562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd365daad789bc374ca28b4e4666876cbeb73b41152685ed17e8e4d1a66807920. 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/CAHQJ1984556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80844961e5f96f18f07a1289ae698f7db8de0df6366f71b11701ddf45b8a5b. 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/GBKQU2397854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ee829f8657603a446f00c7b1c56e6cb96220ce1d46d4b6523f7cebcc848b19. 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/QZKDK2130365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c55529a62e0975569eb807fb03518878db0f1f9dd8526d1a91c354a039f382. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CAGOO1991914.
Hardstyle Hurricane Vol. 2 : Dark Side Dimensions