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 0x5275119cad73d529ccef9bedfa13ad6299fc6fcd4571e600647802bd92764db7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1ecd3a3-2077-48b4-a015-6e1de85670bd.json and https://artists.proofprofile.net/proofs/artist/d1ecd3a3-2077-48b4-a015-6e1de85670bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hindemith. Heiden. Skolnik - Werke für Violoncello und Klavier
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 0x9794e8e6002a2bf318f6a276a60c79e17a6a78b856c14ab012a31c0520637a5f. 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/DEPI82402801.
Davos 1917 - Original Motion Picture Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107218bfb02e69aa92310f015809790c992f73e9cab4027aff83cd850659113f. 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/CH6542415942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4f054059c6f73ab94e33451b6d71d96d6188632fc8652105e1f9819c06c3a4. 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/CH6542415958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae7ef5bcc7022dbec3e98ccfcef33bfcbe32df8a67ccf4632abd17c876488d7. 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/CH6542415969.
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 0x8f92bef8db97e68505edfd51614545cf6e1fe492b83615fb2054bd8247fa028e. 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/FR9W12447482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47754059c9789b916eeaa8ed985bf0d408ac9262b9e1300c277a35dae3ef4e8b. 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/FR9W12447487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7720ad9162fc2d03c7360dd52ac2f0562e44863e357c697c6b24ffb24195194e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR9W12447488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d983a0b5c3f06456632d26321f89acb08acaa98af0b86d2ecf11ba4c718c754. 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/FR9W12447494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b70ff4ab54619bfe3ca8ad178daab66c46ba4f4199a2a9a18f096399322ec7. 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/FR9W12447491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85576f8a1ee35af7671ec2a0f50982b7f9ef939625aa1635fadc3c4f8a7bf084. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR9W12447483.
Le Soleil Qui Entre Dans la Pièce et Illumine Tout
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579e6d23eff1fdc6da45f8155904c05f8f29018b6c7e0792933f614c1aa89bcb. 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/FR9W12447484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb06d26bb26bd4703498b8f75e07a44ac95882cfdbfa1cba24b4bb0ff8e04b36. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR9W12447485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89147f043444b6584d459a155718032fbc9a02dd094165fe461991ace1161a65. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/FR9W12447486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440341240226e51b54e86acfef4b6d6871c13f470b876a705805ab8109c907d2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR9W12447489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb317ceb72a7a5b27d491d820f5dbdcacba3c6b2d451d32c5f712218936468044. 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/FR9W12447490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3fa372dd528c9331fa44380d8cfbe4c32a7c01feb57c326ec501a249b3150d. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR9W12447492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc3d7448b2990591fc29df22535cc3efc6d1476331c6118f673fd5d804bf5b8. 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/FR9W12447493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99df35a311ad879f8ea1573ffa032619651066cf2245eaf20a51b3333151206. 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/QZDA62420871.