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 0x5de605d76f493b3529650c576562076ea0e741ec55031abae4200675f2af5078. 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/01ff3e92-6b97-4c2b-9902-568e64eeebe0.json and https://artists.proofprofile.net/proofs/artist/01ff3e92-6b97-4c2b-9902-568e64eeebe0.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 0xcd5cb0ad31013dbfe72a3156b29fff7ebf80d345fd068db1df90fea4f8d030be. 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/USCGH2115526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb941c3fdf27a8fb89681fe3cf4650a4a33cca8ddcefb0ed3c91f1a8b1095ea9d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USCGH2115528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c3808885b0776c545730892bf313599f7ecc98bd6740ad26e31748cdf41370. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USL4Q1913811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785f62cf67062838a1833c6f90e556c3966507cfa68dd1156c31c56724059bce. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USL4Q1913813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2621de3b73d776f2e27b1a412a1f30ba4674147cd32da709c6ccda663401ee69. 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/USL4Q1913815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ce49b26b3407d75ea5a6117761070a654503b647553175427d27d297ffa342. 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/USL4Q1913816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4b3a963d4cb9d2cc1244424041586324c83fdb167588efa636ea69f2892195. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USL4Q1913817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85333928e37bcbb288b344ad71a80187f11f8a41a8b6a614cdfb8681f5d56187. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USL4Q1913819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c6b28b90ea605e44d1cca1f7fbadf6fd47a5db9987b5ddb6a9df498a56719c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USL4Q1913837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25bc414e6ce23d4b982cd6da494b026989a26c70f40e2dc9da15489491b9415. 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/USL4Q1913842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9fbc2c7f179ed7772636bf2dff162006c5bb3cd1cb20732c553ed509a0e1b0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q1913846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bf746a267f80a96aa536409290b29712e97a9b025ee5f9af85ab415a2fd3ad. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USL4Q2044497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c6cd057a042aa2b686a60229d57c5d0f2262deefa0ac0a4b1bb3d84a551500. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USL4Q2044498.
Canto do Pintassilgo Pinheirinho (Spinus Magellanicus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b2c554b36d5b0cee1385b15f31dfa896ea32cd1a0af34c5e5d38ebf9fc45a. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USX9P2070679.
Lindo Canto do Pintassilgo Português (Carduelis Carduelis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dfca5c59ecf3635e1c5d410ead44c731595ebee8d476bd9c2738a3f8cb3be9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USX9P2070682.
Canário Terra Piando e Chamando com estalo