Alfredo Rodrigo Duarte (25 February 1891 – 26 June 1982), better known as Alfredo Marceneiro, was a Portuguese fado singer. His stage name is derived from his original profession as a joiner (marcene
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 0x3b9a52a570fe432ba03f8aa5de5ce5e6007e922ab5b827af7aedf8f38cc31096. 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/d95341e7-3782-4bf8-80f4-251ca6f78bd6.json and https://artists.proofprofile.net/proofs/artist/d95341e7-3782-4bf8-80f4-251ca6f78bd6.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 0x5fe5a790201b6f96e3b541aac15d83a29c614e63e1c3e551f2e727f7ee9d7753. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/PTOV19100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325056f951b75fe99a7e878c3c6d73dd4fba7f87a5a55297afd97c2ec124b5ab. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/PTOV19500005.
The Fabulous Marceneiro / O Fabuloso Marceneiro
The fabulous Marceneiro/O fabuloso Marceneiro (Edição remasterizada e aumentada)
The fabulous Marceneiro/O fabuloso Marceneiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa454623683b8fea1420af018568e16283e5e1d5f8fc7c83df41e4413d3700f9e. 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/PTVC11100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd200088602d8771d3103af872902e67dc4fd7956852dca70523d5c3d736e5157. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PTVC11100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feb3268d2a55a2c6cf06878e59bba6274d5da13bed2bf867d4cbfe420a2fa80. 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/PTVC11100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3738edbd4be483e0a82d072100fdc37d690db86e438a0bd47513d399ef67985. 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/PTVC11100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479c850b84414437b907b72c769005f58638586c9f40e105af0ad7d246986032. 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/PTVC11100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22406485156ae62c988b50c4ff55e3b3792d0d422a9f7447bab01646b9771f2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTVC11100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62d5a5edbf433abf7b70bc15f0c83c892c688588037f1a6c1304e7f0fb3d397. 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/PTVC11100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5126f28a9090f7ec7068b5424d15ecaca7c449de2d92ce1d8c71c9ce793dce5d. 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/PTVC11100046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa319acbc505cbd2154209604e0d657f8af25778eec2f9eabd75655e8dc9d4e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/PTVC11100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23415a92127d44354cc2c3583f6e14fbf1bbcecd1ae8a91712deda499bd40c6. 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/PTVC11100048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7483bc87fb357202040d0508bae790aa1ed3f1d0c9a0d1d30f13acc40eb64c3. 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/PTVC11100049.
The Fabulous Marceneiro / O Fabuloso Marceneiro (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dd4b82bda430166b2a5d12902a9c9bb4c45c9d39470e5c24a573565cc7b06f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/PTCN11200020.
Alfredo Marceneiro (O Amor É Água Que Corre)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16504a6ad61791dcd485a81206495c4292af33bd2ca8c67625441b0b0271949. 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/PTVC16100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ffe4153a38a7c512f19b94e6f60a7d6117c940f59da8ea14fb032876946dcf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PTVC16100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1024e5d10d59ffd516ce5849d97172e0667ae727fa5675cc600ef562c5b2329e. 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/PTVC17200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff19294ca45234284de7bb15957bb82da1b3117601d7afdec406fe5d3c1835ca. 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/PTVC16400037.