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 0xb5cd7b6253446faf44b64d285464b8c02e10471d1fa9d23184ab0e064286614a. 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/90706054-4a27-4f3e-8454-c0ac34e82189.json and https://artists.proofprofile.net/proofs/artist/90706054-4a27-4f3e-8454-c0ac34e82189.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 0xccac7507e644618ce975deb9e2dc96f5064af1fd7388c7bdd8ac8e4dc37c921a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLS161802060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4459b2146469ae65571ebe12830593bef9f56edbad66d78e01abe7da6e8efab. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM8DG2049497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c4f6846e7ee48bfc1e88d1c3140a7bca57ed29fa0db8a6b767b782ef76c786. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:35Z), 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/QZFP52022451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f5186bb6d7911e1e96d0c561e0f42298543234eac6f2a5260c3e2f144c2df3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:05Z), 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/NLS161802433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff9ee32778546254ebf0061e6707b0d28250c176e30c96c23a05a0cc06048e6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLS161802434.
Pillen, Pep & Ketamine (Radio Edit) [2021 Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8f591179c795de903b3be171a5310b528a09c8bacfac720a398a3e62675534. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBKQU2285452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995a3642c6e6bc085e78ddf6ffb57909c92d9d0cd6dd65fb3865f9d60fe191d7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHNC2396941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbf7b26ad65838880f16d0c7130e5fa8ac458a869d6b25c7abdb6696da44978. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:20:34Z), 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/QZWFN2318706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c91a0ec53714561c6630e6439fede36f560dd38e16cfe885d7ea8325b9666. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZFYZ2497771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573a7b379bdb700582b174d71e15412ac95131a54783462392a4b96c3f367e2d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEQ2491842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dea1bf3265f2cd5995ee76561ffb17c14197fbcd897d5ffa55f760332bfa95. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZMEQ2491852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505521e043550bebac4d4149d304a3f3e920bde8eae7c6aba3a53ee5df2cfa92. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBA2439668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe080813e8ac5deef7f3f1f5874822a7b323d66543ae895fa93935798f46f8393. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZZ7P2443234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b8c0917653a9f521a92fd454168a43094a7f33fcc1910de7f60007b7209af4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA52566305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9f2724ebf969eb4d7c38dbf7815db0e406bc14c6f76d297e09e1baf3b9df8b. 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/QZDA52566306.