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 0xbc9127f5ee1dddb123ac9928475bfc40ac2049604d349604a276693ccd468440. 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/a4c959cf-d6ec-42b0-a062-9975d4182343.json and https://artists.proofprofile.net/proofs/artist/a4c959cf-d6ec-42b0-a062-9975d4182343.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 0x5f95a616de4bac86926f55fc0e42c3d3eb3ea4b1d59acb059dd626edd2301148. 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/QZN882126146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd35e36bfaf655915af3e2885748fd9028560dd9011e2c824560116fd78696d. 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/QZN882126150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d5489f8b28efbe772d5a0fbf38284d9069a7afc0464f7ae11d21ed38ea9eaf. 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/CA5KR1506724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea14d2587eb9157ae6bb06ac95b852e7706e4ff2492989f971fdb863ba39658. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/COAKK2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64c457412b1aa1a32bef30ea3e1ca50935b90971aa0e007db8afe3e0c4365d9. 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/COAKK2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bf237d68638ea43ae586b346dbc5d976127f09539fc6211b0f294331d40bc1. 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/FR2X41691431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5772f652a728a94878c9c249d5ee289674d52ca3f852e5dff49760d2eafbf6. 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/FR2X41691445.
Ultima noche (Jeivy Dance & Reymi Records Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c2263877f2239ee8ad01cb0fae152fb880dd3dcb28c9e0fa320fc1f46a1116. 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/QZN882532621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ec862c4f313851c04cd27241dbc824d7ae595ee69ebf57ee442638b4a9dfd3. 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/US7VG2537851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c0f9df164fb7d56d6058610769af4dd206184cbf8d1a5d77dec001230fc16d. 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/COAF42499086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ed73055985412b7907221fbf1e21ca9ab5a7547452ec72493d566ea4cfa022. 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/QZZ8A2421944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4ec9cc8ac602c0f5b3a9c9e6463ad43f51b3cd7d144cdc0a3e52397d41b9b4. 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/QZWDW2452671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56684c43af0db39cc18c983afe81674fe97df24dc754213982037739b28cc72. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:59Z), 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/QZWDW2406635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa715fb0e98ac9065bb940dda2f97cbac783790ba6b4c7f5a24c792603efedc01. 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/QZYFZ2467482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10efcc4be0661f5a4c9e4c974b1637bccb0e519aa40b6b1afe61e62521b2a2ab. 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/QZYFZ2467487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c76edb30178f43453e020f453ac2d246461c045a9db563c1bad75a2069b732. 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/USA2P2439577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee643f6e27639f08da78b079851da300aca66314e1ce6926b7e6a7cee54ec114. 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/QZYFZ2413850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb04df0afa4ce83f24fe93d0203e7f020ac39ddd32e2ee9d2cdbaf19b319354. 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/DGA062015735.