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 0x5b2e0407e16e8f93ba8119fca6db6431f18d31db50ec41bf703b9e0450759291. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1035dfb-d35b-4b4f-89dd-99805e9d33a0.json and https://artists.proofprofile.net/proofs/artist/f1035dfb-d35b-4b4f-89dd-99805e9d33a0.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 0xfe49dd0b6f70cba553df9440a680cf82f28011cd35eed3beebadfe6372e8fb4e. 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/TCJPQ2168330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ead311ef23653215d734a15b820948a71bb927f6addbf57cc7dc1df9933795. 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/JPW462373745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e53e62863a221388556d9cf93eb3205389cca6c06623704575b5b5575e5dc9. 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/JPW462434814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdbf33835d47f4754b7bc8fedf85860c7df49189afad61815f9f52248f1de02. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPW462412609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75432eaaa89d3660828e7fb1f822ff5bf00aef271706e0804ea9b45edc956a0e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPW462446177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaba67a94ac5916de33e9d7a11df96b791b8994c009140062c4ebf91ff9cc5c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPW462451871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560ad273bc160b087fb18e28f5eb229ee52e55eeb7b092bb6ded92b20f181cb5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPW462451872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967fc105e7f53536dde4a67ff9ab1da12210e52909a3634c01bd10c8868593fb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPW462424174.
桜舞い散る風があなたの隣をすり抜けて
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbe5a171ec9c367b6e85e983840edfb928a49bb1fa66005ab1c60be9c701c5f. 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/JPW462523785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8db424a467ca7d2329f06bb05dea02683032d7bff1abc7fac3fa22ca5b9eb23. 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/JP92N2278551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75432eaaa89d3660828e7fb1f822ff5bf00aef271706e0804ea9b45edc956a0e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW462446177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe49dd0b6f70cba553df9440a680cf82f28011cd35eed3beebadfe6372e8fb4e. 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/TCJPQ2168330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadaba67a94ac5916de33e9d7a11df96b791b8994c009140062c4ebf91ff9cc5c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPW462451871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560ad273bc160b087fb18e28f5eb229ee52e55eeb7b092bb6ded92b20f181cb5. 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/JPW462451872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306415d42a9f027295893a8a6f7db4eb71f34ffe48f2fd7048f202a3b488087a. 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/JPW462555682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6dea6e263aac8d824428db1ba78cd64e800832031fcffb79087656de9ba798. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:22Z), 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/JPW462544455.