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 0xcdd23e98af8ab5cecfc727198e99f5bd1ef583d6fab20657b25e563a72bda759. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08047c8e-108c-4792-87f7-1850de06694a.json and https://artists.proofprofile.net/proofs/artist/08047c8e-108c-4792-87f7-1850de06694a.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 0xd3f0daf5ca56d8c6c2e0665f8b36149f25aa5ed96fdcd717521e6de2ac182900. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/BRPPD0400695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a5b0a9d08dd25d3b4f97b0f42aaf8ab51d5ed3f136d1d34d8ee726f95b4fa6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRPPD0400696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d3f26947c0e893ae9e6692752338532cea7a644c5c97cd457902f1804bfd5e. 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/BRPPD0400697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a8769449597c9c9291e8428eda579e48a5e4799e1d7ff40afde505cdeb6559. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BRPPD0400698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d10ab5c8c434c34063eb4be54bb9398131926f64119fc371f53e6143c6c2224. 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/BRPPD0400699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d655d9d0660a027542d60b8a1776f9410bed02e9f18d74a64acf69cf9415bc. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRPPD0400700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b01a1d8f4171b2527735d1ce934dcefb49526d761c92300091f02083750567. 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/BRPPD0400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19727f37ff614c031fe6ca4426eeb002193ac92e6d4058723127e0ccc8de2288. 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/BRPPD0400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9e5b958d598c3ab6ca37577ddd91ac8317f467bb04c66768ac3eda6bbde00d. 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/BRPPD0400703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00414da8206cdad64628b23dad1a48b7f79d7e8a7d4811bf65ff885ef0647f49. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/BRPPD0400704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641bae37f39d130c328cf6c8e57054f3c1e0cd8f529be0cf55ef619f6cdef604. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BRPPD0400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5606013cac58d1d11483ffe8ba84f43ee01f7e4c5ad02d934ef176ec33f8be. 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/BRPPD0400708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280e78c89cb983eeca36fa4081a83084d5c222247bce1deb97ed080e2c922a1f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BCLPB2100020.