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 0x88239fea18473e7940a96fdc17286a14aa60ba50fc3a4cd14342250a51d628b1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4839b35c-caf2-4d29-b853-4facbcb50188.json and https://artists.proofprofile.net/proofs/artist/4839b35c-caf2-4d29-b853-4facbcb50188.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 0x0d1ca5ecee4a98bdee2f029330a5500e8dfb84e3b814c1f553f6e0d25d622da7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZLL92388671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba5eef6d2a646b98c108eb570904c387f19b3fe8f5e94484b437e69d6356d5b. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:08:12Z), 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/QZLL92388676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288352922773902325d9492aa3b0e28a6ff7a6c1c6fbec12a4711c38dcf750ea. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USLD91766665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccedfaa4cfef26b087d1b44dd29789bc1af39e4d1069cc4f2d6d05a22a74689. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USLD91766666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2444b08685e29a42014ff3f4253c070aef2d4155b798b0a24c2fdb5d1c02ef. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLD91767589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a84014a0a37d0163484a26b1f1c5566be081a13554bfa27774f80ffc92f0d2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:47Z), 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/USLD91771076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e0e4a645591ca8929fb4048bc973ce6a302497d73b8a76d43abfba3a02d273. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:27Z), 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/USLD91771077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa4c28a59600bee3f4d15ca624f06cc40f236b3d4bf76e106dc650a364e82b0. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USLD91771078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d48881a9a920ea4b7512a880aa8e7f0cc422160c7428b7d6c3897ca91680a9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:13Z), 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/USLD91771079.
Free JB (feat. BabyCrook, FifthBall & RicherThanRoddy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199243a015b7c216320d274a974586f7651daffcb0ab3ab94b75779e9873bf1e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:20Z), 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/USLD91771080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161ef23381bc182f3320fcc1e5ede91956247209e2e6dddf24438d1b0b01a3cf. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/USLD91771082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3c1bffac8f2916bc1476942f9662c3e41fb262316f05ee29667f3c5cac369f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USLD91771083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8691f33d9eccd49fdfb710418c44a198caf65e49d8fb4f3aa12bba88d6a02681. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USLD91771084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11610b5fe0ad68d6b882bbf63bbf783219a6ab79fb0cbb4556e66c0d5c575d15. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USLD91771085.
Smack Team (feat. FifthBall & BabyCrook)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c622c9985cff5e801b494907385bdef57ec76c1386365e4ae21d88d17c89b1. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/USLD91771086.