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 0x24cf472efd896ea9fafcd3456705841f42d32bac0f2e03c83343d6dcc0c63878. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aff122f5-548c-4ecd-bfcf-7a9abbe4fd35.json and https://artists.proofprofile.net/proofs/artist/aff122f5-548c-4ecd-bfcf-7a9abbe4fd35.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 0x774cc9842fc5b0255b94859fa39a9a97459f7c6d9be4b3da85a407fe327cb1a1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZHN82569086.
ENCRUZILHADA: dance com a ancestralidade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb556a09e69d8e906facd1a7793c765240e90f947015fa31d1aa887b03f3536. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZPLS2539095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e83a09a85f1127f2248ef3c0bc8a33fd6d425e881d3c45879521d1b65ed1c7c. 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/QZPLS2539096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe023e4463790dc76f53f4dcd2c80219f6cfcae3a8fd295cbd6bea86e90dc2b0f. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZPLS2539097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070693dddbee70809a2a5ac13fff0977726489628a8d8f2eea7c24bc28e1fa7c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZPLS2539098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ae6b57d25818f3a358a263e820052e8c804612a658d1ef1ad30340f204523c. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZNWX2502978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6d13e0a671f82020ce423e91ef303dfee915772d0c0275beb3ab6e3290956d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZNWX2555011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931f61586fed9b5cb1c6947ef989e0c82bcd41e9b7b98930120027a359b18444. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZPLS2539099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b87ed1cb8d1ed57913655862eb586fde771f5e878e72cdda4cd46ccce5bf543. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZWFJ2553803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb043ddaaf1eb01bca8f9b3fef8964b4d8edb1377b42196670c4a98c611c9a568. 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/QZWFJ2553804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed5b2f3068f0652fb099c9b35a53e40d21ee54a2fc97e6d8d86d3cc133820da. 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/QZWFJ2553805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb36da5d788e555b73de93d9f0227022a7256a46430a0d8a265a503adca612a. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFJ2553806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61f0294ad8d6789e61aa41d20054c4a0958cf5be4cc4a49f1a919ff18caa0a5. 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/QZWFJ2553807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d78f4ddf9b9dd1c509dd493c6344c2afb762ba57284693c36f3034c770f7ef2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFJ2553808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839ef9bdb1f23c2e56cd6f46525aaa907e72caabc3fcf04297959d90189f559c. 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/QZWFJ2553809.