Vienna ( ; ; ) is the capital, most populous city, and one of the nine states of Austria. It is Austria's primate city, with just over two million inhabitants. Its larger metropolitan area has a pop
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 0xe0c8c2f66fc5656f09e26a7bcd4102aeaf509c0df7adea5d62e7480ff4a1554f. 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/f492f658-64da-4219-87ca-f77ea657ed4e.json and https://artists.proofprofile.net/proofs/artist/f492f658-64da-4219-87ca-f77ea657ed4e.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 0xf086cf71554697767381e3bdd8471757e10f3018d7739e24c6451b9037f7e930. 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/ES5062202301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f9f4efec5a6535dc69ffe5f9b5dcc2ff0bc6e93aeda748364d1ac4564475e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5062208201.
Tot Allò Que una Vesprada Morí amb les Bicicletes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e091b36d2a7cbcc60e950eb84d078245b939d8f0e47c279ecb1f886a907a1c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES81G2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957de548adace74f7dee661343abc3b52a1d2d90fb50563346919a8e856d46ed. 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/ES81G2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d0c0884e201253fa36d803e3aa39f2eedd11abfee530e84400ae087a8bd66. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES81G2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9e3973054812055da0070e4e758ed01aaa4781842178bb54df42513e94669a. 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/ES81G2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441940cab2be496ff142fea172d2cfdeb7b8888577293c7af9c6ab481a5d155. 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/ES81G2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb841cee5b650461675f303bf4af43d99ac20e162fd7a2efd2c65215e4df0e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES81G2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c0c3f83605927b75a0c7442ee3b004231d387c33fd0441c20706fd99563d37. 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/ES81G2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4be1b525c447e3a702620972482de7fb020973335590305100550b71864e85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES81G2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249ee4f234fba805d6b17a018ea16d78b5eec30a93a6558e711496fa19b3b3f9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES81G2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c868e0edc9ab02ee63fc2a147356f95de3cebb17210a8c328584cceface60f. 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/ES81G2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ad0fc435d90bfc6b350a7a78ffb2ce5bb79f87311be3db7212b13d2e4648d1. 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/ES5062407901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee4c5a46f651dc56c78684427defad95d2e00808488671c5e822c012e94016. 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/ES5062406101.
Després D'un Temps de Bona Relació, un Dia Vaig Anar a Sa Casa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96daa6a90a1a8151c33bc1c95895c42dbf6b355f6c252bd793529ac127b278d7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:57:33Z), 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/ES5062200301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf086cf71554697767381e3bdd8471757e10f3018d7739e24c6451b9037f7e930. 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/ES5062202301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59aae54ee44e3032fa3905b40f86a8cac4c786b8554fa9223b61518321d5265. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5062200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec7acd3b9ec186b39bf17f6a0a5049ee22b75f94fd1d3bf852ec08dce95a04. 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/ES5062201101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec7acd3b9ec186b39bf17f6a0a5049ee22b75f94fd1d3bf852ec08dce95a04. 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/ES5062201101.
Quan Tot S'enlaira (El Disc de la Marató)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d31ec15163725870b28f396a5ce4d5c1a4ee54f15287d17cbbafa7063196431. 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/ES81G2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4be1b525c447e3a702620972482de7fb020973335590305100550b71864e85. 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/ES81G2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb841cee5b650461675f303bf4af43d99ac20e162fd7a2efd2c65215e4df0e8. 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/ES81G2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e091b36d2a7cbcc60e950eb84d078245b939d8f0e47c279ecb1f886a907a1c7. 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/ES81G2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5441940cab2be496ff142fea172d2cfdeb7b8888577293c7af9c6ab481a5d155. 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/ES81G2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249ee4f234fba805d6b17a018ea16d78b5eec30a93a6558e711496fa19b3b3f9. 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/ES81G2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8099fad4243f995e6091f7bce5d615af17249918e4f0d91a1b1c98a9486fcb. 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/QM4TW2015050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2848c737084371a3000594265f5d474bdff4307136414377b61fea783faea9ee. 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/QMBZ91978125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b3548640384644df35c20c239e7c948691591c148d8dff7f458848ddd6ef88. 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/ES81G2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2848c737084371a3000594265f5d474bdff4307136414377b61fea783faea9ee. 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/QMBZ91978125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8099fad4243f995e6091f7bce5d615af17249918e4f0d91a1b1c98a9486fcb. 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/QM4TW2015050.