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 0xa726335388b35b47a683ff204f0ebdbb43d4e55bd7c972a49433f2b931fc50fd. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cacc46ba-6fa4-4215-9952-76f8ff87a86c.json and https://artists.proofprofile.net/proofs/artist/cacc46ba-6fa4-4215-9952-76f8ff87a86c.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 0x3ac186ef099c11bba6755b6310762743e3bdfb6765d0be9751f6db7b7532f65c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/PTGMQ0700909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42c1108e8ab4c57c308655be6b1d5d1cf2a90abad525fea37d5937fad9812e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PTJV10900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8252aa197943718140c04e7e1f315243d513bf1cd8ff278e74f2f7dbf66b389. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/PTJV10900089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f8c4c649b1e227b8208850c74b70cb49abecb2ab347684a66dbb156ca3b7e3. 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/USCGH1496429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1a161f388c92039bcbadcc6344a9493910b40d2fab4547ab0a16b1c194acf9. 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/USCGH1496430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dce4e5863661f2c497e355bcc0cf70419ac4afd34ee9c577f762b3ab9b8ee0a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USCGH1496431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686ae64dfb52d27edc28dc99fb12d6b8b3694e1c5194c6a86c8dedb942522d00. 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/USCGH1496432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd879d3c6a23f1578477f6cd6d2babad1ce972a915fa6929af968f087d375f2f6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USCGH1496433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c25d9eb195f6baef2c5be84829dfb58895d89aa0af4cbb7770845b3de557e2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1496435.
Sem Salário Fixo (feat. Sir Scratch & Capicua)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a235c79e7e365ed48dcd3769011094cfda501b48e320f3f746a71faacc9637. 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/USCGH1496436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f57fe6a700b103c0b1ca1c155f8eefebac9698982398d14e46f60d06e140651. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USCGH1496437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcd3ea5aae0b373f364809a60c94d2c6f46b4028270fdb0cc7bc6f754fefbe2. 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/USCGH1496438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adf08f09e56c6ae438bb8c6fb8c804797a35e3f65d005a89e5a2e59c0b9c989. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH1496439.
Freedom (feat. Virgul & Dino D´santiago)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08e15b4ad0fefdc1b87115934849aedd133686df5e2c78e3fe086286590fb32. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGH1496440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636f098dcfbd25657fa66278fbe6a0bcb7db0288322af534c3b833310a19c259. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCGH1496441.
Nunca Te Encontrei (feat. Selma Uamusse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb7eb763d95f33bc2fd36c004ea763670ae9fb77473e28092c4cd06ebf21eb8. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USCGH1496443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ee6df76778b2d4a8813e214e0d6ba8570c7654462249ce2a7207dc62d9a13. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QM6MZ2075610.
Robbie Wan Kenobi Apresenta Idiossincrático
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cef4d84e017dc335b8cb4c0c81d0df014021155c3837a292e06f5e895cf2f05. 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/PT0HJ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71b1cd6f251ed7756a3c65617894e2239bc53a1ef7101e6985d3a5a85aa9fa9. 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/PT0HJ1800022.