Cefa (, ) is a commune in Bihor County, Crișana, Romania with a population of 2,200 people as of 2021. It is composed of three villages: Ateaș (Atyás), Cefa, and Inand (Inánd). It also included five o
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 0xf18e7282e554203525e6e9de6b64ffac96b4e208ebd8d0eae64e21f6a15cba14. 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/d16f422b-4225-474d-a579-0042444cee6d.json and https://artists.proofprofile.net/proofs/artist/d16f422b-4225-474d-a579-0042444cee6d.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 0xd75c7c75db75f2c2c10313c0f9f61d9dd2da6af9f26ac3073bdad7325f888c66. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BXVTF1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba14a269e1f2d52bb1a2f662e59a56753047ef21db245b4fdec280d6cd433ec7. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/BXVTF1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e144e373ff37080e6b3395339ab699e1d28cbcc7011a7499cc477e1c3251b4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BXVTF1500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd0d954bfb34190ee804055cae9dc5bcd925632ccb9eadbd37183579740474a. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/BXVTF1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9f4ccb9ad9a2c37aca8fd53dc69f60821768724b24ddefe9f2068c903996c8. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/BXVTF1500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc57a8ba3ea21368534e2de984a708b379201fb0278f888cb9209e6a1b91991. 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/QZ5AB1638351.
Ensaio Sobre a Tempestade: Viajantes Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca93a7382d338f43ed345ca2c49ccd2a32eeb75a4b6fbf28bfddf187b054c25. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BXUCW2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3928cc360a93e5824240740fb0677279d423ca776e769a0138f6e0a2ff9e2a7a. 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/BXUCW2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f513b0860465feb2c0d6a68c4dca645c069555f1bf1b87c141473ab2b0981ef. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/BXUCW2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc32c76e3a4eec261d2f75dd4e0bb8a3e09c039835ebd6227231139d88d2224. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BXUCW2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61391c3e427920fbb0d7c82fd81484d0449235f08b6a2b1a881f6f2f2e9b0dac. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BXUCW2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5bd4363aa3130e206c9dd851291e2afe369f804ca7a438e303c8f26333f48f. 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/BXUCW2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e9717fbb6b8020ef7af4428f9d59c178e9370dff9b52b54ae26400fe2d9789. 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/BXUCW2000010.
Distorcendo as Palavras - CAØS REIMAGINADØ
Mais Um Dia (Parte 2) - CAØS REIMAGINADØ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b596d23d71e6312e8eaaedb02e16ffc4f3e96e797fc794fd270a9ec1ad2a467. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/BXUCW2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027d4c863a0b6daf813093b05bb7d0b22b4021884d20005d48599f448335cbb5. 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/BXUCW2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4182ba36335d23087d2a31b7447f62acacef85a16e6ae9101692955de2bd003c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/BXUCW2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152c1d2cd5e4962fdbcc97fbcb2558acacffafbe22a38ce6d25940c2fe098291. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXUCW2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc40c5bdba4ce3e20953022999ae4dc560a83e95cc9e8444f8d49f9abc4ff23. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BXUCW2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4182ba36335d23087d2a31b7447f62acacef85a16e6ae9101692955de2bd003c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BXUCW2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69208c9c109acfa3a8ba78921aa8eef75666353a98f46f1a0f457c3910b8b9fd. 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/BXUCW2400007.