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 0x85b0b8ccb688ff9718cd394d55175731232adc371d6282e06c1892321f379be1. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed5d75c5-0c34-4663-a400-ad424aaa8f3b.json and https://artists.proofprofile.net/proofs/artist/ed5d75c5-0c34-4663-a400-ad424aaa8f3b.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 0x91256868813c7d2678dda69bd6e92031298f31ba88c03db4d7d8f29bae31b60a. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:28:39Z), 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/QZTRX2560342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbe0ac6e0f51f893e9974ea2502ea670db151304ede6929dc778aa005d9fe6d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWDD2533776.
Hasta Que Te Conocí / Costumbres / Así Fue / El Noa Noa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938fba68d30ef79efe81819c371a1369970cafe3943c846b70c3afd933a596e4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:46:10Z), 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/QZWDD2533838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ab7c7b8e487d0f8280b5004f1cabf9db35c0a90907372ec4a6ee25de8e1f7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:47:06Z), 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/QZWDD2533839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce170ec068f1d2535bb7f8013ffd0de1cf221783c23624e2457df075e962296. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZWDD2533842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b531ec1dab1a4eb5ff3f6b57dfc9da036269d876544c7e5067b9308eada346e. 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/QZWDD2533845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9116544c54c10cc2aaebaaff9d77f485a80ca0c5c19b7277daaff9f1bcb47f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWDD2533848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe781a591806b4dc8cad1a4c7b225388469c5b2e2b90a41cc7a708925a29ae6f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:46:05Z), 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/QZWDD2533849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fb666a5b1540dcf77e7ee13fc0cddd91b9d6c6367be5d3cf6b7d4fb671b42f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:04:32Z), 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/QZWDD2533850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8c76ea8887bcd77d7f5fb4589e05125d14e079faffe840360c63ef59277941. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:37:54Z), 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/QZWDD2533851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee390a9b9028ff4be55f114a21a33eac7e987ec76df5eaa3fafb64d9f458a1c. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZWDD2533852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ded87f1eec287efb398352af01d5c81b05bee6426f381c899e1a9760b8b44d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWDD2533853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6491e4abaa43e651721f64179b3aadc3ad0509535ede22e32f76997f742bfcb8. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:16Z), 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/QZZ8B2524067.