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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d219afe264064a7c3af368d9f16ebcbcc4d2955fab8b4716ce5a82b28857b6c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb78aa06-9286-4adf-afe1-b91d673f4b43.json and https://artists.proofprofile.net/proofs/artist/cb78aa06-9286-4adf-afe1-b91d673f4b43.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe946bda638be24279a809b437e936bbc0f6a5c4abd2151ad9fc617d16c5c8a82. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QM82C1400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc12541cd28692d4c85d13cb17fda5674788de36e98a8b199c29699eb50c6a7. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/QM82C1400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47a25a1b5c358af64dd074017e424cbd418804e354db480c02cb0932462ca51. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QM82C1400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887253d49d5751809ef47a9800f1b9254498bac2abdac5a93c1c5555573566ee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM82C1400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f6175796374a18a5e1bacdddecbfb85761873eb32c3fdb2546104af942bc5d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM82C1400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969f086f82975cc17d6b5268c5a1f474111b6e624e586577eb9841ca1276222d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM82C1400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3dc08752672dac07543f2dc332af01d62cef7651038e44ac844174c2ab973a. 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/QM82C1400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b557502b68c034fe86c3ede1070b103cec5afeb81331274d21563f7719726ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM82C1400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afe755e7a00b68a2b5ed70cde2d3d4f3304fa6ea4301e20f22ade3a11a7ad14. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QM82C1400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc745cb6990dadbc08a428970d0e51bc19bbc16feffdd8d26bb4b86ab9a79e3. 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/GBKPL1787512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8560ecd70b9389f3e276dbb48deb481165ac7940f97edf1812957d242e2528d2. 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/CAM372100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64d622d6bd29150ee14534678a759b4227803d2ae236835c42858cb85dcdcc8. 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/USQY51603371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a98b762de3ed6b4c8fcc45c7e6a3814227c9ffcb6a89ea3184357062f22f1f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ3CX1600988.