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 0x7c10173c7cb7fb8f8031febd0832da3db3d261c216b8e7b8d94e2823a6e27f4b. 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/fbefa248-7ef1-4dc7-ba55-26870d150d46.json and https://artists.proofprofile.net/proofs/artist/fbefa248-7ef1-4dc7-ba55-26870d150d46.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 0x67a0e8fa108fcfc8db533d25ea2a64e814292ca017f122fb434d3209f17599c9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IL6652002001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fcc2b5e9774cee664cec793713d5bfb6dad4e51e084f81168b09ed1d3d4267. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL6652002002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc695e8b518a700025ce9f88fb216c24d509c88da9d0f0e4d50fb86ac2bd64dfd. 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/IL6652102400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c8f3597cb5dd9b6b33783cb0f177d014973f111a7b768983a9ad51c06ed570. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/IL6652102389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004caca7a9263d141ecff2a1be8a721965864ae99329a1efe66cba8af46a9882. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/IL6652102390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123df51b5803a04f547eb030768e313475330ea9ad3ccbb039d172a0ab544861. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IL6652102656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fb764840ad3d16528124b62f01722e9cb2056b4828abd5990e1ca541244110. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL6652102652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7282835ef14290fc1a4993879afc249831460ab9aedf3655117a2d2b72e327. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/IL6652102659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7836ea6a1ce2e84e5dd6161efed44dec07d1301d3a34eb619006800282c61027. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IL6652102648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342f2fc97270ec783ff6681aca89567ba4a4f046ad504bbce3cae12a42beeb75. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IL6652103059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b871113bb28c78f260d8c0bca7b49511130c55b337741eb943455d4f0f19a56. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/IL6652103062.
The One Eyed Captain - Captain Qubz Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a80a0711e94f49d8854581bc6ab17e433e2a3f2514ec2766c2092ae4ead9d78. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/IL6652205033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b6985b7f985b2a970bc5f80bc4fbc59c10cde3e2fe8001de363e96b2f50240. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IL6652205034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347f1629f477249db809e971ef0c11bbdacc7dee0c2d315c0d7a329f18d1d6b5. 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/IL6652306793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438edc948802002b760b574293e6cfabeed6594523d8b44a0dd59673c915678f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/IL6652308136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad01439dd7afd2619f7fb0ed073889e52009a5803b3fcca262df70bf3cf74d2c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/IL6652409105.