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 0x5ab66c93edfeb8abf76f0c3ac5e3312f2319eee9883c32e13b80efaf3ffa3487. 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/df25cf6a-d7e7-4379-ba59-375f9fb7dfda.json and https://artists.proofprofile.net/proofs/artist/df25cf6a-d7e7-4379-ba59-375f9fb7dfda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stabat mater: VII. And The Mother Did Weep
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 0x0fac37c79d1b9bba2b8a7449ec8efabf77090e73056b9eb13176ae3b5210116b. 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/GBPFW0800053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a1db5ae360d8235d2edd63fb8e3b5fde12f854d2cf28de94dc1739faac55b6. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/GBPFW0800051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdada3263d5ac98e99b91d17b2e789028f4d8a0eef18fb6bc0c5e862d82332d43. 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/GBPFW0800047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2b36dbdc1daaa36cb519fef004b9ffa145c61e1d310a1696272347859195eb. 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/GBPFW0800048.
Stabat mater: III. Vidit Jesum In Tormentis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1c69bd6ebaf9623b52d712d94251daf6910e656a009141f8a4859a251fc3d3. 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/GBPFW0800049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8c1259421fc5765f9283db2ad38685e6b61cb1b03464583324fc9c0a00257a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBPFW0800050.