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 0xacd07448cb091c91e90661b60cfa17b656e417b67f1fb34277ae7a5e6216f57f. 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/8e4c2930-736e-4d39-bb6e-fd4e7540e062.json and https://artists.proofprofile.net/proofs/artist/8e4c2930-736e-4d39-bb6e-fd4e7540e062.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 0x7b5d06a0337391b7294e3e26a6c03bad96036b7c1b44832e4e8fe37dfaa77148. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/GBEBR1400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ec745d5b821abdb47076758eb3662bcac5b0c5893b65c400ccc550ee42b7c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBEBR1400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a906e9b6ad9114e6a9531df3dd587c038a9a3ecb9f93abe56b8cf6ee1b4fd2. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:04Z), 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/INSD11900440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff4d74cdcd80260d56212862eb2d4f5fda192e90a14f7dcc762db512c606a2a. 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/INS182302362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203bd3e07fcb17d72c4fc0a051e8a66ca147ae4f8cab33f86202cfbc4cfa8a63. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAIZ2412360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb896775ed5af9c598fdc6764af70ee301ac161dc52acfd2381606e4815b0a30. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAIZ2412365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153279687602fbd3945f734f5a70ba729b6814c80beae9e408af0409db74e325. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCAJA2412374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8102d4178159d9895cbb035fefd0f0ccb9627a45887e0cf9fe73efa937bfdc3. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:39:57Z), 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/TCAIZ2412379.