Duna is the Hungarian name for the Danube River. Other places with the name Duna include: D'Una River, Brazil Duna (woreda), Hadiya Zone, Ethiopia Duna, Iran (disambiguation), places in Iran 23617 D
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 0x0be5edcaf35af4027e4a849a58e3cf6be0ae66cf0d2e529f40be3dd429a0e5ba. 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/3a1d3b2e-583b-4fd0-8091-c34c9e038cb2.json and https://artists.proofprofile.net/proofs/artist/3a1d3b2e-583b-4fd0-8091-c34c9e038cb2.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 0xa87aea53b2c41621d3c16fa71f67b3b677767a1430a07e8155d52d5cde7fa4ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARF472000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85154175d8da3b9e7fb7f456f92273d6e47857c6009e7dcaab64cca43721ce0b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/ARF472000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f59e20f6dcff534ae6ef326b01ba793f99c9f9b311a317b91dd61d3f686b61. 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/ARF472000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a00e2c470cac4b54e686e89b513ca9cfd980dc23a7751ebb35a24809edc71f. 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/ARF472000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a6572ef745aa1731dac1a0d663af16a178cb1bcb590e086f6d438c31f2dfa1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ARF472000213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f76f687bbfba095088ff2823ba7c3c4b5065e099f8efa591de8992ec1e0b63. 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/ARF472000214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20674258778f622d43e218d306ef0ddbc2d7aa9e08ecd86b4eb7c406a5b1a00d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ARF472000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69e6610aefe7971eb0da3b41e24cffb08916feb00b7d406d69cb8c992c2d886. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ARF472000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82baa332de91840036e65d245b5ac9b076c4c07ed26df63b42fefbb8b589dbc2. 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/ARF472000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daee4be11b7bebcce0ee8e33a4e4caa55bdfd5ea99f5379dcc4a3fb3ac34303. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ARF472000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf88da22dff1503807f2e73e579a7673132ae15a084058bba0eb5f097e4c2b0. 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/ARF472000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8136bb2a2d640b2612c48ca611df440b41abf699c439d6d4bad4946cc7ca2d09. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ARF472000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65c9743b57db5d9d8342f8fc580a081774d29f3b3f310011097a171e63d292e. 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/ARF472000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ab2c197d8109f7c0c77de2afce95658a373dde4b2af55342f11b39efab7f4a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ARF472000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d7f7d59f77d5663259b8dcea200ac15990aa2685cdc5e520d2b96a9df5d5b5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ARF472000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030d07d808d635fecfc2e86827383b7102c038f09d8277dc0486d50e6ca874a4. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ARF472000228.
Vagar - Ambient Mix - Remasterizado 2020
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5064d279156311bd91264daf35cc7916cae5f64ef2d6041321aaef6eea3b0923. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ARF472000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284ab62ed525eb3da51af2d1fc607e87346e2ee7ddb274da7b8cf8dc018be7e9. 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/ARF471500118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6897f114351b8b3aeae539e7b2514c095d0913b26a785eeb9cc4bb744b72c02d. 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/ARF471500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a143809823e59bfa5f736d38ed42808c5087d658e00b6d5fff023283e2b94a5. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ARA141900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278fd0a6c4e4abba30fb99246aebcf70b8d9da8e130e3af7b4a35cca4811c3b1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARA141900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5c7708728c87ec7f3e1c84ababe8433648ccf71186bb272ec1d8be1c824dc5. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/ARA141900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e74cad2063fe4b8f5ed0ab1ca6c96878acf3f84bace3b5f3d70c5c8859f7fe0. 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/ARA141900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cb954322d4c7c7f6039a548758e578ac252f6c0be2909327513646a1d01191. 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/ARA141900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59fb364d0fcfaf3a29e84f37088e5a64827fd990b92c844d1a99526f89e27c0. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ARA141900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b93d4ad6c394e1c4eda6a4c15f3e43d0a5cc782559dced9b3212d5585e7df2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ARA141900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a887c5a4b14c46c2dce8e2c04cd138ecb1817a0f3183082dea9cad7418bf8b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ARA141900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348ed84556e032eb77f910beb6832a089de4f9810e7ba9023d968706ee3c1757. 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/ARA141900012.
Por Probar el Vino y el Agua Salada - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a1fa5655190b0d883c9a4cc0d80d01c09ca4eb3f28e228577a00243ac42b18. 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/ARF470400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cc153d83fe19ac5d899978dfe14a84bcb8cec0f309fca45f0873a0d9798226. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ARXWE0100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9260624af16f84e31a234f3e552a79398461c0df248dbf7a555230be254fc2bd. 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/ARF472400245.