thumb|400px|Buda in the Middle Ages (Nuremberg Chronicle, 1493) Buda (, ), Czech and , is the part of Budapest, the capital city of Hungary, that lies on the western bank of the Danube. Historically
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 0x8ae7b54d786be502a4b87cce401e78be4efe9bb9958268b1736a113f1239dac0. 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/8659352b-476d-4d5e-ac26-7ebde06f26df.json and https://artists.proofprofile.net/proofs/artist/8659352b-476d-4d5e-ac26-7ebde06f26df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dhammapada "el Camino de la Verdad" (Las Enseñanzas Sagradas de Buda)
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 0x859a8413b74387339e6df23a4aa2195f3268f45e8a05393bed21394883e57ec1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ES7932200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f714f01c2e5a2dcc9c6696191371a4f63cead608bd7a600ce4702bba4336e6a. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/ES7932200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c45932d3e05857ccacd348f1a88ae24daf37bd86d7ac0bf39f160ddb5d6bb9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES7932200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fe1633916d215be8145e86d0c4b25b5a8d942029fff95a38ce627b8a8339cd. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/ES7932200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204c100010d8cfea4a628c6c6aba4466242b7480ea8873a3c6f55046149a16e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ES7932200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff828d278ebfd65c35b85efe3bbc90a0b60ea81ad01128603418effd3ac2fc2. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES7932200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d732b4668e6c23a349687b42385802e8508045e736dfa44bb7a0e216579d187. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/ES7932200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37314a1a27911973627be2f66eea847c7e5fb967f8ab0c494727043150d1264. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ES7932200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5867f264f0437db1da603f724d07be6cea39585f3eb5ceefa40bb188b3a8567. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ES7932200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c711e87432485d2ec43877167c30f9aab86e9337cfcf1db4745e752d053972b. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ES7932200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476bf906ac28e35fb1b9d9401febae5b031a0c7a15ac10eeefbc9510f0179058. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES7932200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747e68fa69c41799d1548140ee8c1ce8c1c1594c272eeb9f3bd4c5e9fd1e92dd. 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/ES7932200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a1a0b91ad13aeb33807bbaadfe97752f9e9fee9e9dfdfb90cd5498725e57b3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ES7932200087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0621cdda8cdbbd44789408d67126988c7532fce1dcb9e378c402fa0761f2356a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/ES7932200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc8f2ae01e324b06bca1c67fc9fcd4391aedf9399eca54ca55fc5f22849d04d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ES7932200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8a54e6a7fd67752affb8fa072ebcc1ce3e823a7d7b6f051097c3dc4485a8eb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ES7932200090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdba584839f2d8cbbcd53e9c53a569e56e85e104badc44cbaed0a16145b10c18. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ES7932200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf034bc6de30f2c6e710789584a02595264414a2c32ccee34ab54165960ed3c0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES7932200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5f9c907a55773771a1640f209cb0723124a81777ad0492e40960f4e6550406. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ES7932200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44320b3a0f2852687820d837d425de9d503a85b4b4380a5db96a61498d3d4b29. 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/ES7932200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce339c3c8d8877ae6d35fda71cc1f0f3258fe298b51af14eb79f732f60009e63. 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/ES7932200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445cd4f1727da15b9ad47ce856d6d4718409f59a74575fdcde0fe2e721e260b0. 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/ES7932200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fad4e0fc2898fc376aea9499d87e0ac4ca5e1732f90d1d0f62b938e0d72116. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/ES7932200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5001b8dcbdefc1014f55b4dedd10aab81e8ced91737155d4cfab1dd39024921a. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/ES7932200098.