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 0x1c6efdcafcf9cb14cc546f17c1d516bab44ce95861265e0612aaab727ae5a8ea. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d9d70bd-aac6-4260-9b29-fa5b8c0284ed.json and https://artists.proofprofile.net/proofs/artist/8d9d70bd-aac6-4260-9b29-fa5b8c0284ed.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 0x228f019869be4138d3467da6d14c54d793470189e20f7ea920818fd73a6defe6. 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/QZMER2142232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eee4a6d97f726bba0ca539b53f006f67f521ed26e5c69a6019b322ba9393908. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:16Z), 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/QZMER2142237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6805feb1ba81a3b2caf0fe20d0ad1641c4e64fe366e1c47907be58a37ddaec. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:01:48Z), 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/QZFZ72491103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdd32a40048094f654b0406a7e3667e3a25ec68bdf42cce0ad47916a4ba5bad. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ72491104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed673359bfb5a952a4ccc5e5eaa8460742288398f04194b6fb34a9efdb845f59. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZTBD2307365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d2fe2655050a8444a53d95359396be963b57c0b4b1cab8e2401c4bd2fce1ff. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZFZ72491105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b19e9d49a5f7eaa8beda06804122d1e633d552616dbd1a1a6535c297a57b903. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZFZ72491106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff0889e5710e6c17176de191444804b7dae0b22750e45b2f9eb1d1ad40a70da. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:55Z), 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/QZFZ72491107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eba39c9841fc10bf8b7180461129608f56be4cd9ca858d1133b911ed0a6f4b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFZ72491108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9147f532e32a1f9877ce8a9a932e155b02f3ec710595a402769f00a618a5d092. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ72491109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5e8a13cb1caaa7e6bdf343fee7d06c884a7f553366cf1ee2a189668ca0f6d3. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:08:12Z), 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/QZFZ72491110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24e0454769d40c13e172a9a243f88ba5916773740b3958313ddccea23ee6c5f. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZFZ72491111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e70258fe853bfa70e65feb416fb0229ad775fe2005938f0161c963df03f177. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ72491113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777842775fde6f94809d2e401738423edc43c730720871921db08c419dbbaa2c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ72491114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda41a180631e1dfaa92393ce9518d56b02dbb6e59ce43f27071b297959077bc8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:30Z), 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/QZFZ72491115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097cc19b505420c678c858ad40cd1e880d5ddc3d84a08f0b13654da02a0a1e5b. 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/QZFZ72491117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca99a102835aa832a35cbb7e4389379a5ee1f5a2774cd92c9823c04e044ec27. 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/QZ5AB2433699.