Tuna de Derecho y Económicas de la Universidad de Barcelona
{"copyright_id":"0xd9191d0901acbe1f404c937c3d2c6d85646602311600ed27480990fab70f2de3","name":"Tuna de Derecho y Económicas de la Universidad de Barcelona","registered_at":"2026-06-12T04:53:02Z","symbol":"NIM0192526","token_address":"0xb92eae47bdb0b000813afc61db49673da9dbebf5","type":"artist","uuid":"9492f8ba-00bf-4350-b00d-938294ec3f07"}
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 0xd9191d0901acbe1f404c937c3d2c6d85646602311600ed27480990fab70f2de3. 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/9492f8ba-00bf-4350-b00d-938294ec3f07.json and https://artists.proofprofile.net/proofs/artist/9492f8ba-00bf-4350-b00d-938294ec3f07.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 0xce722d74415117a92e6d70db3b6c44dae2dda6a004afd3500d47c08813c35e6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5299500357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1193b15ca1f3b3b431cb4fee35739a4533f3b9ea1165bd378eebc4f1024fc4e3. 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/ES5299500355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97d28a10599003f610ec56e2c702fc1e50af9f9e045e5d2e6233ddf8f438848. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5299500365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fd02f4bebc64acfd8c521110475531268e176548643aa8896b30d33f040558. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/ES5299500363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6154969dab902a1468473fb69397d52773fd8a9d5d0b518b1a59a7cb75e50dbe. 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/ES5299500358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a49df64b7d81c237be71028cca8aa801777dd7a83d2dc2ccdda07dfda2aa74. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ES5299500360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf289970f6244b949b8bee84b2c8bb276260844cf4ec3a4250c87415e8f879862. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ES5299500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ad27ba43c7e7a92f0ee29ade9303179939d2562acea3647d724f348e37b96b. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:10:37Z), 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/ES5299500362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65852c293f0948c3b9d8226fd4cdb71e7b057f25c07037589cae0bdf3eebba7d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES5299500404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5913b652fea3efb1286a2435ed718d6f9658dd7570ca5133da462c8a768d062a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ES5299500364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364b29c93c025b2bbe9e47aeca66de699d34ae8c2394227578efdb00f424d7c0. 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/ES5299500367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3769e7de1ea5ff4619ed454c33e74f8744f14328ca5bced032002f845fbb2360. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/ES5299500407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede91fe670e0f9227c11d55ae9092624eefd72cdd89158ef548a55cd61ac1384. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ES5299500368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6de8115a76a122e02f59275b4798329e8ea3c675e40f8808ad87ec591be24a5. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ES5299500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308672beaea33790cfbcbcdba46de72bf86080832e7f2ab44bf18a99f92bec4c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5299500356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbedad8ad7677688f2cae615978edfb8f0c3d7471c9b8c662368c5ddb6f2ce34. 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/ES5299500417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa605ef968e0a7565bc141b20096800e09e823a3aa26df9e7d2b448182893121. 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/ES5299500405.