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 0xf039fb4e5813c67cbdc263091bbeb9fa532b0ff67294e82106a48f20e4d1fd67. 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/3d17f070-f562-4ef8-8f06-47c36dcb0937.json and https://artists.proofprofile.net/proofs/artist/3d17f070-f562-4ef8-8f06-47c36dcb0937.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 0xa4414c4ee6d7c0521ee28e9a2a212605c9ccd318ab250139c2d148a6906afcfa. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN52025934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c5101dd3ce09c654f2b1addc763b1b5a5dfb4308596f4c04a04ad92bcc6a04. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:37:07Z), 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/QZHN52025935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d90d4916254b744d8c45c9a131e5e95fe69af904bb1ff85177da14fea0610f8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN52025936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496ccd183280898f264ca22dd18b5a04ba1a52dc93f0f67f14b108cf1f2cd5be. 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/QZHN52025938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96de0d302128ffc352bf03646d82990d1d413dcc293dfa12d77cdb35c57d0b8a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZHN52025940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce71a8d0ff6aab5432729d7f0bfe4537f3a647cc5de3d109b4a715277eae0ee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN62055415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccedc796b9e92e51b455c29d7ba76d77388f34729fc4c4e172e776009b3fd56. 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/QZHNB2052688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6583d0ad90209a8e737d181c0857dc0b000ffda229e24ce0462c6b5109f36e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNB2052689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770e2a82ed3be626bca7e9140a5aeb46b610811f1df1deed9851daddd8310d12. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHNB2052690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7ab6c7039ceb30bbde8cc6a3e5169ebab33ed87ac21538b495f95250ae4016. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2156917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ab5e8ecd892d535f086422e0f8111e19c77f923e5e37f9a18316f4bf2f7ad8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZES82252038.
Bandolers - (Bandoleros Catalan Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844a77a995d0c9501cbd2799d72cfee8d1f9cc6237a4c8e5f12991e3e0b2c151. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:08:12Z), 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/QZNJY2316241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e753762182c117cbf134715b305040a8bbfbf93a0bd9d73d4ec59cf82311a3. 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/QZTPX2306432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a4317c0142332b92bd0951ba8e5aac6a057ba2f0b24b7ec5831883d0f0298c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTPX2306433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5759daa7afa9c51f94c07b78a073b765414be06a8012a3089c524b793393fba7. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ES71G2415233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ab20be142655ab7397addd2862e49d3916638f25e7686abe45c43a98d68640. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:38:02Z), 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/QZTB92440538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44475499bbdf7e889cdac5f66f8d70c8c074af004d77fd1e659e753f7b26ee47. 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/QZTB92440539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345f85f007910962e201ab4874c7a1dcf231c9c58b211566fac0f6a89b6c73ac. 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/ES17E2000573.