Enrique Domingo Cadícamo (Luján, Buenos Aires province, July 15, 1900 – Buenos Aires, December 3, 1999) was a prolific Argentine tango lyricist, poet and novelist. From an initial Symbolist bent, he 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d2148e45b943ae28097d1d384f41fd7c0b47dd7ac946e73ca8288c07b45072. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7586673c-2175-4d1f-9320-330b3914c7f4.json and https://artists.proofprofile.net/proofs/artist/7586673c-2175-4d1f-9320-330b3914c7f4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Poeta y el Cantor, Cadicamo Con Goyeneche (with Roberto Goyeneche)
La Novia Ausente - Diálogo 2: Cadícamo con Goyeneche
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 0xd4481f9cffd016dcb6c768e6c121cba1c6806b43a228e9744e1b3a4fa2915643. 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/ARF038600068.
El Cantor De Buenos Aires - Palabras 2: de Enrique Cadícamo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f258cfdb7b3d019da20616a4a791329b0bedc611ce83ad104dd51b6710298fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ARF038600076.
Callejera - Palabras 3: De Enrique Cadícamo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69526775a09ef41eea55b0ab8d0afa908f32fe659b638fae86d6f910481229ab. 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/ARF038600078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9a7862464ab5750345cacf85dd9902725ee2f2cdab647ad3a17d27e591634f. 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/ARF037700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb676b9bee532dc4a30ee7cdb9eae0afcae9c7efac1093ea096d7179d1ce2c816. 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/QMFMF1443232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6894e63a6a531bfe4ddb134f0922cbee86640e169169ba49867ca26e6a6c4a7. 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/QMFMF1443245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a68b10d019d017ff3c724386667b384ef721baf179ff6fc6887719f091d030. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMFMF1443234.
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 0x852219fa01738c2a310b739b37050c55bdc9d048d23ba4f0ce3142d5177c12f4. 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/QMFMF1443237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaef9d151b2aaa0346a75d0809a38da2c5679e6c9c894cfa1d7f88ffa162b2e1. 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/QMFMF1443238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7056d96d4fafbf2090cf4c874713e1dbd5b315b767065e1f06fe0494493bc01. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QMFMF1443243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d12ec3b6c0f2cd79fe85274a35e7451a0b18c167272bc9a49448f76931f01b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QMFMF1443249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf89028f16e2603f490d7c33faec170358eb1d29710e5c6e0ef4003aa3a4374. 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/QMFMF1443252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa30197bbab95510d107207d0601755a85d2da9b76dbb976484df7b547ea314. 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/ARF038600086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10874f2981b18eaa985bc543bb6121fefa485fbb39b99b0163f35f432bda9e2c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CA5KR1575496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8106a2ab88694b18674d0abe0d2de8f234f5c9b7687131f432fde3ad418f623. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CA5KR1552250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36214040dabec74d752e8298f19c239632887a43a1179a913733e6b05ed389d4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/CA5KR1552387.