Edmar Castañeda (born 1978) is a Colombian harpist. He performs his own compositions as well as tapping into native music of Colombia and Venezuela. He leads a trio with Julian Miltenburger on drums
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 0x257eb709859e5639ea8cc38f8206fe05b6e102135c5d813dbea47b03552e2b56. 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/13e1e377-8d77-4329-987e-63bcddcf266a.json and https://artists.proofprofile.net/proofs/artist/13e1e377-8d77-4329-987e-63bcddcf266a.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 0xfc7c26ad22ad1e39d57f728278fd67b3a264405e1c9e0a7f09bac47fa02f323c. 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/USHM21103329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd666081457387f70d61e40e0999cccb32127e5a021d71cd2384c2d13be551d91. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USDY42173728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600a0353badf7f063509220d7ccec1832b8b01fd0aa7e2d81d98a52e4d566d9. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/USDY42173729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca1c89e7f1cbf994f2e10421463d3091d9e7344299fa5532b6249fc9c3297d4. 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/ES7732102243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbedf7c594d1854bb7b31f1ec26e42d7a85c84318d3ba8cd461a7d86da0dc1e. 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/USTE11700363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33649970076e3d6abd8b6643366554bc44c3fe7035ba7deb8ddebe9ce6368213. 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/USTE11700364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33019204be82316d9e98bcddcbe33dc9b7f5c77cfd7034c3ea10dd4099e0e9c0. 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/USTE11700365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeb9e8e6df8e1a4da211eb156b32abe08b1caa1e63e2f71e15207d42b7a10ad. 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/USTE11700366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9578b0d8bec2e0521c73bc5ef8c60472ea71763ccb94672e4f4321093723300. 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/USTE11700367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9a50966182b12b9575033e8bb9429284953a90601813f6be4a0638c84da4ba. 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/USTE11700368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce5688eadd9bde82286d1dc4a61297fb9baa7c1e58816ee5872d579e74e02b3. 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/USTE11700369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0c7cfe6f851b0dd91dccff4277e10f0eea1aef24c337a2345c0ae9ada59891. 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/USTE11700370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ab3cd2bfdf8fbc1348b3aa3a12f7f30ec5c9a1847e1d9bc7958735165eabd7. 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/USTE11700371.
Eribo Eriboñe (feat. Steve Turre & Edmar Castañeda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe8358ead12af37e1cf2e4d925f5591f79cd1d0f87c6a6242e2121c06802d83. 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/USTCZ0991884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86a91406a61c506e7a3cf8bbd7c6c4edac86121f78c06c0f9b2b76cdb6127fb. 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/NLC241600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf396f95b69beade1b588d69fe0a4d8fb18765648d0221d4ee9f1f70766ec9869. 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/US9331414201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab4788b4d7ded6a5a162d5de2ff4f377e4d33afa69198cb18d2774457240f3b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMDA72276815.
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 0x70423b4b8435d296c3088028a12e17dc6591ef3170d3ba573e187ff8ef604411. 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/USKO11100858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad5aef83e83659378a161eb83a517731f52a07fc80b4bd2783d062553d012a1. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USKO11100865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1342952ecb93eee05a653d46cff2dab9d627d4009e7e007f5ebb77e2836e9a0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMFME2337620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd6f5d6c73baddce1ff7aa39c13d0253139d1b95477a5145490dca9997f25ff. 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/ES31E2204679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b9ba287532dfdccb7b5a2a7c03bedbf814efac7f3ed6a803bf5fe567d47efe. 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/FR6V80947417.