thumb|right|Amelita Baltar in 2016. María Amelia Baltar (September 24, 1940), better known as Amelita Baltar, is an Argentine singer, one of the leading voices of tango, that appeared in the 60's to b
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 0x076f498c2b736da8b515b7c2a429ced38beab1a97baecb44bb68b75a8e048524. 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/3e5d583f-9dfe-42d3-af17-10c8f1f456ef.json and https://artists.proofprofile.net/proofs/artist/3e5d583f-9dfe-42d3-af17-10c8f1f456ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piazzolla Íntimo en el 16. Rue Descartes (Tango en París)
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 0x6591e5668e583c1005160a9668baa93db81a20f2452bc10a95832c3bd386f147. 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/ARU8P2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc960dd45aed22f8c94bf78d13eed239837a6156a487f689fd471dd2d3b89a10. 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/ARF411300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae25f42fff3611ea9b767101ee16afd3e7e0d0edeb5a040b05e9f21b06eae90c. 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/QMBZ91350445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c1614730d23793b3652bf0b77e2d1b9a4b9d7e95699d64e734f317eae026e9. 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/ARF410701462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736b3bc9ff2bdde0cdf7a4998638ede3335f9d00c484a7e048a2de87eedd60be. 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/ARF411201187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324c9fc76e83e46039465f65a354cc9dbbfc8a29334a5dfa6956d1fd7ce31e89. 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/ARF411201198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b2ca347ad8db575a4de87987b96371c397dd647d54a46e254a89113f8488c4. 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/ARF410500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc28fe7f5bffc92749761ed6ab90579363edc36d90ab021797cbc4bea5127ec5. 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/ARF411001046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc73c467d19396b66f34aa28432806c37a92e93aa8c40264d09e39b2305efbb5. 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/ARF411300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade99ef2128cedb2ccf8db44904529f780dc03f3489377afa55a7df8e78367f6. 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/ARF411200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6986fdafe44a2dd3ce8d702d55fa095cfdae179e6d8a39de4f0e3cb05d414fd. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ARF411200710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70cecfe631a929c624e54444c335d5001f0af0ad8ea13211afdf87aab64031e. 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/ARF410400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888fb9e74702f731ee5801d332a039285ff5c1385928740a5e140b4f276f28d7. 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/ARF410500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d69e6b328696293d49688172e45efd0c78c54a008e857cf9193e5cf49577a6. 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/ARF410800699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cf7a3f2dd34322494d97991ab9da383f26132f58c08835452ab89677aa8bc6. 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/ARK481700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fca5213fec44f7f21c78d73e29bee4ff3b812c5bada60cb1b0ed9e9a224f1b5. 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/ARK481700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67037623725e4cad6e43acadf4b00849df1038f0f479a8bfe9d20e0ea13832ab. 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/ARK481700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8890e14638b3d57a6af0cc5ebef47377f60caa38c7e56eb7e7b4c70be6d1149a. 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/ARK481700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd440f888be068658627252ff4317c517d3069b43d5b5107cea07d7fd4d1ddca7. 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/ARK481700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36d6578f3d7682912e4a88705190fafc68c8474933efdd5a60e68b8800fbd0b. 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/ARK481700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7748534bb48b2cdca132f73bcb2037d6d8e2e91232daf779c98bee8c6bfe10. 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/ARK481700031.
Canta Vinicius y Piazzolla - Bossa & Tango
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07701497ee76b37dfa6601043177cf4f6fe458e024b968e6450d176697745175. 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/ARF050400920.
Amelita Baltar Interpreta A A. Piazzolla
Edición Crítica: Amelita Baltar Interpreta a Piazzolla - Ferrer (feat. Astor Piazzolla)
Traje Unos Tangos/ Irresponsables/ Balada para un Loco (Medley Premios Gardel)
Traje Unos Tangos/ Irresponsables/ Balada para un Loco - Medley Premios Gardel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ce098f0400de48c752ea7becbb26d3763c1899fff97de40feb4c826d4db6a2. 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/ARZ022000452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa477dc815cc2e52d38e91adcf57b1491a4241cb242a9a5ab06782d819bd4bbc8. 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/USA560306551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6535230f84bcaec878e88b9792056519db9866c0b9dc253efaf282874c2be13. 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/USA560306554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448091b61ea5738fb151957fd061da9fb2f94d3b34b199ffd526a024ae28be8e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEA549800900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499337edfbaf11282d7fed16a4a0d7729de614786bbea8118ca1e5e18f230b6a. 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/ARF109902659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea455cf808d841c8b09ef367425f5d1fe4bf8a96284db66b76fed50bcb637dca. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ARUEL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa40c9e5c639ed35498ed1ca1d07b5c088b1aebbb859b78177e0d2bbba49357c. 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/ARUEL2300005.
Jorge Guillermo & Edgrado Acuña Quinteto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e6daae3b59e628425b3b4a6103aa7f6f0907f3fe91dcbe0c56dd8136ba584e. 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/ARF050600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0a59dfa536a539ba33477b4f3080f774bfea2ed0a210decdffe3977ef2af41. 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/USA560306550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d15148c176d2fc8a325ee53109ba2710572f4b1c54661fddbef30bbea05650. 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/ARK481600003.
Buenos Aires - Paris (Deuxieme Voyage) - Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0033df8c5af8849fe15903e2bc6fa22ac07b6d8fe3423f8b1591a000dfed74fd. 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/USA560306552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1639fc52706c793ada183f446240361e04ae8089e74bdaf25f78175c9c66c5b3. 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/USA560306555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448091b61ea5738fb151957fd061da9fb2f94d3b34b199ffd526a024ae28be8e. 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/DEA549800900.