Rafael Canarozzo, better known as Rafael Canaro (22 June 1890 – 28 January 1972), was an Uruguayan musician, orchestra conductor, and composer who became a naturalized citizen of Argentina. He was th
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 0x5067491aad6d2f8263409965cbbe8578c023736f55e94b23ceae584a0daa1e93. 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/5dc5a21b-215f-437a-9037-673d19a85b5b.json and https://artists.proofprofile.net/proofs/artist/5dc5a21b-215f-437a-9037-673d19a85b5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Argentine Tangos (1928 - 1954), Vol. 1
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 0xce7fa6c062af4f0f8d273ec32e83694e724b3ead5a9c2423dd961437065f8add. 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/CA5KR1575295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e40b69a3837fcfaaec166c70da33a5f4caaef2c2701e9f5b72d4e9f81003a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMEU31506358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4170aa7da09cf35104551be8ca582f801e8c7af934a9df2ded614563edddd98b. 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/QMEU31506362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d996ae0bd1003398322139b7b3df5012b38efa9d089c1a5e794ba04639ba96. 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/QMEU31506363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abe46c0e3a19656ee245a890db82ff7cd2eeee672a32acbb81f15e73f781c33. 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/QMEU31506365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318d12a407b4c6e7180ba49348ff13455a3269ad8725d8179cc34d1cba7f3b69. 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/QMEU31506378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ba4c3e76c42ebfdb1967e3f022d26c0d50cde09322c61f86b468cd3c2c3a83. 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/ARA821410953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b932d8a2f039669a3b267e099957552e236eab6477001b1ef1ef3fad5a8d0f. 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/ARA821410955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ac9f4e6c9322700d6b01ab7736e712b00e1ea60872b0333274adfefaaa3b9a. 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/ARA821410956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c90c9bf3602287e657ff555f237507aeb509640ad94ae08a4641a1ddffa0fee. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ARA821410951.
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 0x1d3279bc31db452bd7c1e5f293029b75ff989fa53d3b8b6a30d333d428c6d93d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ARA821410958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0891e4df75bc10a74c8623665074bcb1f719a4400b5f23f9b1d1befc47e192. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ARA821410959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3abbbe9f12033c9459c1d460bf293008e78cc25b64ab7941c53dba105d6d8f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ARA821410961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c47877477540ee66ddce539e47731a0ab6ce1a5417010e7922914f979d6ffa0. 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/GBURZ1205752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c1ce6399820039de1dfd637180991930076f7865d6e54830614b597445fc5e. 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/ARA821660253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38de0a19b5ae074fe63c3b40ef57530e095dc403b7532cbc09357bd021420c33. 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/ARA821660251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606786276496e254af9ea23d4e1479533ff5ecf68151c127b2816e97bbe5dbab. 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/ARA821660252.
Los Reyes del Tango: El Tango en Berlin, Vol. 1 – Adalbert Lutter y Su Orquesta Típica (Remastered 2015)