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 0x1b07efec9628408eb11a31ba4e5f719e78e997b5f81eab0548a91670ed836deb. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87b6bfe3-9879-4b9c-8315-27fd721c2bcf.json and https://artists.proofprofile.net/proofs/artist/87b6bfe3-9879-4b9c-8315-27fd721c2bcf.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 0x897ef760b97f6c23687b23632a888c270f8fc82e0d20d89aa14c1bc96cf1fe76. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEPI82112633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d92cd93715a4d311326f3af73705c541b7ee3fe20bf95124a9b615677fa8025. 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/DEZC62447629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7856fba54e2501dc7c1ba5c1acd17085948358b9dd0ab39abb48249ef6d0b8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEPI82308202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0f3f408f3019275301f6ed39dfcf014810207bdfa675c2c01bbfde192081f6. 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/DEPI82208008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897ef760b97f6c23687b23632a888c270f8fc82e0d20d89aa14c1bc96cf1fe76. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DEPI82112633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afefdd741743f00adee38ab26c7734fffd1028a221c0aa371d2df78c9947d2e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA062477993.
La Verdad Y La Vida (Days Before El Camino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b7068dcfe6187fdaa7d9623477509569e1f18907ce0ef0d2ae6c634a34b45. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCAHL2344534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da663ab4ea62ae065e21a58232e43c214898c5e94a18d27b736eacdece4be2d. 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/TCAHQ2368141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b7068dcfe6187fdaa7d9623477509569e1f18907ce0ef0d2ae6c634a34b45. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCAHL2344534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd439e6dce761f6d39dcab6f4f7c9e5f01e8de8a48c8dee2716c69d3fb0167c9. 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/DEZC62362585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53573bd966e99fc051d51fe41ea916aa00e732991cbe8f63604e1f7bac1a7851. 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/DEPI82211281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ddd009597c69f390b052ef2dfac1b7936c3c30e015517925d5764bab119f6e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEZC62369612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7856fba54e2501dc7c1ba5c1acd17085948358b9dd0ab39abb48249ef6d0b8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEPI82308202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc991358ad8ef9375c7e352643e772a680b39ce9cdf8657cadffc4bdbb9bcda2c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAIO2485231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a8cd566ae42c0bd9b14b682bbb326d43d7cd3b23b75e7aa50f448f07fb7480. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEZC62444849.