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 0xc35ab80ac76de7fa5586307bceb9b5171375fba08150cf58efb121655ae17561. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db81d677-1abf-4f46-8490-416d4af1ed63.json and https://artists.proofprofile.net/proofs/artist/db81d677-1abf-4f46-8490-416d4af1ed63.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 0x8a2ef6093dd192979c6716aaa5c949a04ef149b881786f812f0aab618e5c1ad2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM7282029357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a489854531f75c04e86cdb4476e7a927a050ff6cb52df08949c296753eabc19. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITA642100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2ef6093dd192979c6716aaa5c949a04ef149b881786f812f0aab618e5c1ad2. 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/QM7282029357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a489854531f75c04e86cdb4476e7a927a050ff6cb52df08949c296753eabc19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITA642100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a55e9544de2ea0eab8140241babefd1e0c3e4c8fa946282c59cdb1137baf81. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITA642100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5293776b51844c4d3121d19dbe1d6a08972d33d7e2361d0ee5f2e5eddde2a5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ITA642100148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854a1c8ad42d2620d3a5244b4e933c187c99d300f2d46b3eb7b72f7884a9e981. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITA642300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854a1c8ad42d2620d3a5244b4e933c187c99d300f2d46b3eb7b72f7884a9e981. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITA642300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2c6986863726e910685b9dd45ab46c39b29b6462b298ab28b2c59420459068. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITA642300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642f04d86933e40f13cd605f53d802df0ddc705ad9cf37ab0ee69f55f95fabf6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITA642300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e59ef3be32691e6629a5aa4b83f8bf9a0fc458b04385a54258e81b54872ae3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITA642300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf873054a168127a92e104d3bfb8c30c1d78f92e6bd13f9e7a47d85330fda9d9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITA642300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b6eba647e5b8f8239ea260ccedad2989f75364f67344b576b9e41ecd2ca1bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITA642300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9128f5e8e1531a75b1d984e9d9f6cae72af12e195ec5b6b0e551fdd0aed49605. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITFR82110122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e59ef3be32691e6629a5aa4b83f8bf9a0fc458b04385a54258e81b54872ae3. 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/ITA642300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854a1c8ad42d2620d3a5244b4e933c187c99d300f2d46b3eb7b72f7884a9e981. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITA642300027.