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 0x12ccc2169c863a74fd9c288d9cfee5287cc6bad481f16a44d2870d061c33471a. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/003f4a0a-b965-459f-8fe8-41114e66b0b6.json and https://artists.proofprofile.net/proofs/artist/003f4a0a-b965-459f-8fe8-41114e66b0b6.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 0x9bb0650cad53aefc6918046dca13cc1f3b8c590eb8d6ec24dd06a980fa1c1c40. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G2031354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d485047bb6f501183fb543e4d46f9a070a43d3e5ca4b9a59a808daa71eea16. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ES71G2024548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d465f8467f2dcfafc3aebbb61cca4d829fe52ddae33c45cfd4e8fcf72d4be2b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ES71G2054295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db66f41ed9145d92756790a8823ab989453bb4455135732121d5f7d72c1043. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES71G2054296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8f6b58628f0531743566678a6478d71dff429deccd29fdaad131663644b737. 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/ES71G2101604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc8330803070ac1a5876fac66b6be71859043d8df1049251c2554d07860da0f. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ES71G2101605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cb02420acfbbbaa0035040e27314ea639f870f970081ccba7951c70b055907. 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/ES71G2101606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d0e65980a6cf40d775fc0f50f5707e91e5cef61e47151f1458139ab785336b. 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/ES71G2101607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fd71d8ba2cc136c1d08b7444d4896e013893a2f5b81b503e4117e5d600f46b. 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/ES71G2101608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d73eba68e715554fd3f4bbe9d95058026a14fd2fc7cedc6bd89d45f297733d. 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/ES71G2101609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5856870f51ec7321a11bc49705907c03da98e7bdb5a9f9e3038977d7d3f3ace7. 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/ES71G2101610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbecc9f42d46eaa3a41a957c176f2e1cd02568039a53ea59d38ff7e8ab91c0ec. 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/ES71G2101611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8125b35b8f6ae6ef79a93488d25c1c34ba56b668e0eec5e4e738c853944cfcf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES71G2101612.
A Subvalorização do Silêncio em Palavras
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81afb1025d9100e92778896c854d8b1682aba3e9c2f189ab36baec28d3a9fd42. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES71G2101613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113cded9f71eb52d418fac0589917cc64a6bf941fb2b5812ea327da9f82be65d. 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/PT2DY2200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa625bb3bda1a06c56500e28deab53051c6d58c5f55f58a2b04e8e5df95c58242. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PT2DY2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035d7ae796f578f5200c542190b69fa202a51b961e2780ac7a61de22482377a8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PT1HS2300124.