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 0xf03f4e6bdb9ae53cdb6ddf323da7d1303d3ca080ff9005b0e20a788490f4def4. 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/29f6f6c0-1285-4676-8197-b65996b45de7.json and https://artists.proofprofile.net/proofs/artist/29f6f6c0-1285-4676-8197-b65996b45de7.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 0xa6c276e89c37f84580ca50b742d64f1154b846d461ed03f76d7fb8968957282a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADX1885640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff25b48f43746ee2f81bfcfc0790e3d3838f7ccc4b49b12101cff794f3f01d4d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:44Z), 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/TCAEC1946944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955687e7099c1c3506558d1938333fc7d70abfc8257305e1d5fec86d32da46ac. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAEG1914997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4afb0c5d0f01ab7664c8f7e0e84c54c35b0bc1136dfe4fd9e7a814f43fc05fb. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/UK6KW1900166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5662ae551962dd63983406b8a372b2bfaac904d83684540a88e2828f2ece275a. 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/GBKPL2081764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1772d78b6020131ef54635a2acfe6e792f0d05e320629ccb7087cf58b16cd29. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZDA52005894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf355eb68847a94a9eae51a7d8ad1e642fd9ffd1d1d1b253964f9d5c50f9402b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:28:20Z), 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/QZDA52007054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c421fa265e5f6bc8ef1d7d4d33a901883019c5199a787a0ebd3245018581d6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNA2038289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0748ac40a9ecfb380a93b6fefbdc8b23ab7bc9a25caae1e7bbbe0d3725a4d0. 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/NLZ8V1800412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d21e15805420f09de304c8275caa8f1b02c950fa3f16a58431545c4458bab3a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZK6F2097356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c600cbb85804c92a8cbc19338ded2441787a267ee83f3358988866cc799db30. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLZ8V1800472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc9aa9cb2e71932646d4956be831ac3ef4bff2726d10d1d82a889b989f2e5ae. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:11:42Z), 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/QZNWT2067492.