thumb|Junkera in 2009 Kepa Junkera Urraza (born 1965 in Bilbao, Euskadi, Spain) is a Basque musician and composer. A master of the trikitixa, the diatonic accordion, he has recorded more than 10 alb
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8a2a5036cc0699443c5558ff7c6d4a8be18de2f0a556c2e0155572977a32de. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e44d6d7-7028-4497-9107-c66a1a6fe55a.json and https://artists.proofprofile.net/proofs/artist/4e44d6d7-7028-4497-9107-c66a1a6fe55a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a26980c26a9b5a27cee9ce29c9f190d5410f6709701afbb51d9e4df2259390. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5590602742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b623f4fcc58edc1e0ade6491e4d74b5d96bf06e6b5bd8a46e7958d29512e53a. 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/ES5789800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8f7f65147a576fc3ce18e61325ee06730d7664e9a4ac5fbba3c5264c51a5f5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5789800017.
Muskerraren Balsa & La Balso De Combouscuro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02350e54001dc34674a664e037424d50d10a49b280b2abe1cbb99279f7e031cc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5789800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba760fb978e788f2cfecee59598be20dc102d6963591b20588e84bd8687c6c5. 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/ES5789800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55db8802ec6223a1a00cef48ea491f346daf462453c779352722d0027e81c0fd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES5789800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa015cf3d28bb4646ce0118fee21cf66f7e34c2c0ddb747abd48a6b27666d610f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM6MZ2106503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebfa44cd16916bf0e1963fce63d845b75568b037f79a55035b9aea32ca73bc6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM6MZ2106522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a61212eb4e4a450b481d06c63d2cad23927e8d83d69a9f9706ec053b6b22388. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:47:49Z), 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/QM6MZ2106546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f1b209a1e747060eb912d23132c5970103f771e7ac87f1314af4fd303f7683. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM6MZ2106584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16fa4572a3fd03869ad14102e1351bb660daf89bda3f0a7f0693fc9fd4a9672. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:42:52Z), 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/ES5080100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebed977cb20b90c67011d863b6be37063e485a6786f8f09978a3da23e74ecf2. 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/ES5080100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f575590571d83654aea9b77c2662b91779e8bbf9a4c8a318d7be19089e12aeb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES6081330503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feeafb46f933d1bdc3a168fad087c684c9d3006ae6db217ba964c97c0d268c5. 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/ES6081330504.
Danza Das Pereiras/Danza de Rubiós/Muiñeira de Mangüeiro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc55424b0825ab968b0796326e576115f2e040afab23c1540f614e974d898f2. 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/ES6081330505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045dd52b57bed14970ea7f3007d044d4d311adcbae49b5b9e6c230661dbc64be. 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/ES6081330506.
O Merlo/Bizkaian Zehar/Lúa Clarea/Pagasarriko Martxea/Lévame, Lévame
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa191cee044453ecef2e9c8b3b930b7bc3c54c015f4a5a03db01a545e4016511f. 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/ES6081330510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2337dc1f5ec906a6bbcfe1d7c516c306d4c17982b7fcfa88db349898d66116ec. 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/ES6081330514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952ec386c1bf1e9a1db09033f1f189bc785f1b45afad09f4c2811747d3be0eb6. 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/ES6081330515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd513d2ddff0bd3dddc27305a0482543c402e26e4f82ca849e448102608db3c28. 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/ES6081330522.
Kepa Junkera & Sorginak, Sorginak Infernuko Hauspotik Irtetzen
Kepa junkera & sorginak, sorginak infernuko hauspotik Irtetzen
Kepa junkera & sorginak, trikitixaren historia txiki bat (una pequeña historia de la Trikitixa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9196ae640aef1f719ed8c6c897e3567bc1cc9b29afcbe4181a0b5807a80819e0. Chain 2 (Bitcoin): anchored in block 957846 (2026-07-13T10:25:43Z), 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/ES6081430701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ba536e80d0057c599f241e9654af63cb78232d67d980d1f536032748a0ea4e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES6081430705.
Kepa Junkera & Sorginak, Trikitixaren Historia Txiki Bat (Una Pequeña Historia De La Trikitixa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeec7418382f9e2fd723e83736c4fdf70b4d3df268e29e11f4e0c0db0acd47dc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PT8CY1800291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d64239b2b23bd2adc58acf531f45aa8a8f3178b74592de508ea470426ef2867. 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/PT8CY1800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca781cf4483ac62f2dedf968aa4f0e868c6f8869c7fb78386d2df71155e4edf. 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/ES5590602740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ed049c036cf11bf33061cdfb7a79cfbe3e83b99af146568707f63cad36939b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/ES5590601215.
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
The Wide World Over: A 40 Year Celebration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42e44080e656763863d3814c6aaf3f4e56e57d3ae84e6f708b9031f7a89c3cc. 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/USBC10100979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03837a1b87a50e9d887bfac4108974dc7f6f40e13a82e3e4af0435febe08d6ff. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESA011716418.