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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3252b3fc23062f83211a153633a20350020b1697e8144c6f09bacd66b5a0e054. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c803bc43-b64d-48f1-b0ad-9680c7c47b9c.json and https://artists.proofprofile.net/proofs/artist/c803bc43-b64d-48f1-b0ad-9680c7c47b9c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950d736c64efb0a95e35d53dfb961ab8070238b01fbc1968718546f1a6301bec. 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/UKB9U1500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7010c057b523b74e950d7f7fe482a5f783da6a67770bd0c3938e533a4c11e316. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKB9U1500128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49110ba66fc7a23c8dfec7f56a28db75abcf6122ea0dd66b6a4819a6086d2472. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UKB9U1500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a78519a9cf5e776369abf0cff4371bbdd9ae03ad76da3e19abbccd05438346. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/UK8261900390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2e2aff95fe8bae4d1c228b6798ff85e02fcb6077168be891ba63632df0b281. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UK8261900391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d3431edcd1a4804172739bd47fd8b5f77c40a6d389c029a8376ebc4180980b. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/UK8261900392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e3946d835385aacc85375f6aa9731beacaeeb3d785f8819745b5db04352c7a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UK8261900394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48baf7f0795873860da7d80f6b6603d74b528903f20fba9b92b771e009c43078. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/UK8261900395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9a954babe6972a50e618b2d76d3e2c6347f349e6dd3ad0970480c4e27b53ac. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/UK8261900396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93014f8f0c7e7b2584b2c06d46e129458db84b6b9f0c12b48b937fa05d1d76f7. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:09:57Z), 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/UK8261900397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2cfa30ff190c902268990f69932122b6d674ba8e467c510a9decf05428a7c6. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/DELA22200375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1268dbbd3dfa08e05f68a2b2b380ec281037cde9ee6bbc61a56e3b435d8698c0. 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/DELA22200376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ef38558026e778bc1814f79faf14ab869894e6a64a1f8601ffb1e11e82073. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DELA22200379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6bb01b418e6b20ceb0766656e1bb82f20839c98271bdb98cf1f6fc77615d9f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DELA22200380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6743155e66b4cd5be63e0d5fe6d0637f7bb16d77e7e56fd6b4ddc79dda0e7cc3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DELA22200382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fafea6c199994c8efe9d9dfa95730906d723096b24dbdbf520a6b50aec0124e. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DELA22300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb571877f4e75ef5d4bfdbccb6ec0fa5aeaef28a0368a117fadb9a0cbc4d20926. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DELA22300412.
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 0xcfbe09c41a5b26ec9fcbd7ef218b6513d99363a33e86d5d56549d1c9dbea2a42. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:11:03Z), 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/DELA22500498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ff503e469866b2984bee7f4d5acb9afba31c6480b26f1e055b9b6e8efbd12d. 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/DELA22500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9953273b2f357ff319eec22926fc405cb7d8664d18d774595a375b95b37270b3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DELA22500504.