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 0xf5e61fbe087dd73af3c7667a1d001dec3b0de5291538eba4737804eaa39ddebc. 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/3d19b226-a02d-4a39-a1cb-9e9ad53a30dc.json and https://artists.proofprofile.net/proofs/artist/3d19b226-a02d-4a39-a1cb-9e9ad53a30dc.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 0xc7be8c3a0afee93885b82424e65b323b9ff24cdd05061d15893bbda31b91bf1e. 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/BEIW12100043.
Fame Won’t Love You (feat. Paris Hilton)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99b8d0588f3621e1567e376e3270876bc36b8a0af694a12cf9e15ce4ad54366. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT22400531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb398d0f989c2ffe2314c5fed374c36bd5b14333f1b12add19164e3c4da3a3ea. 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/USUG12306950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81335c02b7f033086bdad823ce41f06792aacab61ae0afa5001a4fc51646707. 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/USA2P2348047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81335c02b7f033086bdad823ce41f06792aacab61ae0afa5001a4fc51646707. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P2348047.
Stars Are Blind (Paris' Version) [feat. Kim Petras]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3685817107967fce51b3a4f7197cd8ca34e0c4ad58f8d50cf6741d883eb48796. 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/GBWUL2394486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b6d2b998280a1090df00e468d7238af53c580fa65196ef534d8ec0e28aafdf. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BEIW12100241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbbc17aef990cd802b4954625847d5bb4ff267a1ba4b179da8a77b8ff4263bc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BEIW12100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a74da2be81e2e3b53c99c2187f2d90a8504a7e8523225cde3aa5b94b7571096. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BEIW12100264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186169fb31823b83a6ddecf0596b945a393c293fc044ed14b0c1625ff596b622. 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/BEIW12100262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc701521c2a94fd534ac501d96231886130f4e2e456f87dcf09e2e90c889feadf. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BEIW12100266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b1aeb9e6f99b9bcf4891c73fa759416293fbf69389078e3d943e284e224b1. 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/BEIW12100256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc885465475a5944a80415be3e7d1ea269f5124737c40345f568484fe11a2daee. 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/BEIW12100252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17079c8b2365f29fc4f906039a590ee1474c15373252dbd2ad6fea824f5d5778. 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/BEIW12100272.