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 0xfd4e0814f91a030ddd3d412c93bf1e49e9c4ecd1038ae7b213c3fb3c0cc5438e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97fbb939-4e56-4c54-8bb0-a2d827a87fce.json and https://artists.proofprofile.net/proofs/artist/97fbb939-4e56-4c54-8bb0-a2d827a87fce.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 0xf8c17c4e72da1aba42f7aa909a2427725c184e05e42b039d23e250f38fd9134b. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BREMI8000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e15db334afcbd4a49373df834be363c140bcc3fcde9b35a253acb2d319301a6. 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/BREMI8000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef97741e4956828c20a9a4db85a61f7b5cc2d7bcee5bf97046775535f4ef0bc8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BREMI8082099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078d4d8a8aefbe0565f5d7201a6a780924537f9984a1de6d4915e5c96bc57da2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BREMI9300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca52a1e87a5ca3771e483e3aaeb47e1660f13fa6fc758fb14020f98364a975e. 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/BREMI8100299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cde5497deef73a5f862eaa1d285b3d4e5f5cbdef5f80f44ca097a72a6b3787. 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/BREMI8000147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f109dd0d347ae0432b57838b6d0f7ca952d47ade1952e40bb7ab1512ae6825. 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/BREMI8100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e59e715d6001e3f56828cd4e7d2f69280d1e8badd748edb13c9f5dfd8db9881. 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/BREMI8082100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814ca70ebb4855d46c65257e61d771009fb6d40c589088e713352c53f096608a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:29Z), 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/BREMI8000206.
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 0xfee09faf3d7356cca79723efea22b42274bb1d041d9511f1e59ea8bcaa7d5247. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BREMI9300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a1c54310c020e4d4bed9bcf5b5f4beccf6f6364ad25c2aed1d6974606c124e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BREMI8000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fc410cd9c2caf43cf4f37b317dd13a133a52f08cd79f481a996d73761e6f25. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/BREMI9400511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5ccfde0be3f43a71e2437f010752a338b3a673fdaa4992337df9b46de54b09. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/BREMI0400191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eff73dfe003dbec12e5465e20ae72a6285f4cfbfdd8753ba627f479157dcc8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRSME1300922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea09e93ec7a4e7f77fad18383234de674a5cd1661b24c5ba73f86094b001eca8. 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/BR3440900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef25b0720df607ccdf7139a293741697471f0eaf0549e8c93e85dd492160d9b. 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/BREMI8000304.
Copacabana à Noite / Gosto Mais do Salgueiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2df2a2e6ab95d6c633d179923558ed8722b7d253924eabed0739c2f04d6eed6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXSVC2200284.