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 0x217679531294a970b0ce2f6e535df66f497a18371987dbc57e2af83a4b55af98. Chain 2 (Bitcoin): anchored in block 954069 (2026-06-17T08:30:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ae2301d-141f-466e-95e4-26c78feadd68.json and https://artists.proofprofile.net/proofs/artist/7ae2301d-141f-466e-95e4-26c78feadd68.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Una Antología de la Música Ciudadana Argentina: Tangos Clásicos (Misceláneas)
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 0x283c6665da97faf9bce4fda648b768d6c805f9efad5048aae9573480e2516ba4. 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/QMBZ91710033.
Encuentro de Grandes Guitarristas Argentinos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a806cc23e1aa3d8266656076d928a5686b41a2b4e44397ba8c16fa979f7705. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QMFMF1305287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfadbf95bbee3bd1c106f21e5b0c521fd1a875416bcada31340e231d35004a5. 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/QMFMF1305288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a95f916dd2b36a9d6586bb379b2571469f6d3cfc20b5f937c00a575a724b6f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QMFMF1305289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad227b5267ee5874c695f30f77c3e460e8f85ad277d04c576688c7da04616bd. 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/QMFMF1305290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70055499358c607157c62cafbc4e0214e785c95c6d1132c81694c23fb8df2f2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QMFMF1305291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f171f261986193c66fd4aa19524b5d4f08538305c31b7135a116d049a8d53. 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/QMFMF1305292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafed369919281e63ec97615f276d1435b2a303b1014cf03e8dfc603739200779. 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/QMFMF1305293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dd0667ba8d347848e07cf723250ececd26c4006ef05bc2d6ffe11a12f0585b. 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/QMFMF1305294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb126679a52f3cd8d4b6e6ed04a7703fbdeff2038a48d97d5ea7d3a7e35a91a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMFMF1305295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b78a5ac2cca37624c38cad0c4c23ccea73b9feed3f51800de6c7400499a0048. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QMFMF1305296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda56d62affa7c23183703a1047b942c9d895e35f97c715487b62c467ab6cad48. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMFMF1305297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ebe7248f8e3a42053e8a7eb973504ad5dacb03e261ada89e3f0f2abdabdcc9. 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/QMFME1547726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b4952ee6d74d0edab851e1d4c7838fbefbebb45e4338a1196fa44fdbccc806. 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/QMFME1547727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566d766e5826f1649a298c5ae44411718cb6ef09fdd9536ece960a03cfec927c. 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/QMFME1547738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c4b0529eed26eac4b2d59e43bcd5a130719846e004a8f358d66cea1287e059. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ARF096800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321d9b06548610ef2e9454893b50c2c75e0344d336f5385e23cb6749c4929378. 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/ARF096500063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3edc6d161caff5e5096121ef37b5f6feb9c28feddbc3c2419fecbc6edc366e. 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/ARF096700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f1b8f16fdd5f0c3468863434bed6a9708fec4cf652e4bcfd258cf50acc8aae. 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/ARF097000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07db312101364954c28a735dc37a3d17691129e56089f260e63932b6a24eff6. 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/ARF096400035.
Horacio Salgan Y Su Orquesta, Con LA Voz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cc5af5681a31388cff38357519369cb89ab96528fdd16a78e18be8952a35f4. 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/ARF097000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28667bbcf827d8f0d77d5392a7d82db7c3592521cd20b7a19d0806c0a303bd35. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ARF096700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99f6abed1023c40cd5f2fd4aab5883e83919e6b045daf4a2ccb83f325294954. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ARF097100070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f89422a6daed2c5faff6c5275146d5a184b34ac69e38711b91045857351d81c. 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/ARF097000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3353167f60d8237b1e6f50da4d22090b1e0130fb7de66ef130a738fc513d343f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ARF096700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013319ece38842e852ff005d5055957e87575276c9d27b564c4b89cd7ea33039. 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/ARF097100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17404ead6ed65d645fa7b0c388a7fadb1a1f10724b3e122d79199f11e24935b8. 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/ARF096200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c83d112297f3dcdb3c15883d705d25a155f057e451b22ae71ed2bcf9c9a4312. 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/ARF097100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74dd48e6ddfb5eef12277002d321a2da69664cd10fa360fe6faff487d3572cc. 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/ARF096400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e47c0f958b8eaa2585383dd9d92c507bcf723b1c06ffbd68962c85e218cb30. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ARF096400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6bff72e13caf9774790cae37151bd0e99dd9b77d5589d9b453beed8313e0c6. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ARF096700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0ed29dcb3c1bcecc20f96fb3fd356bdfed880ba4b27564700eec5489a4c1d2. 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/ARF096700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578b62f6103b84a277be984bf6fabd5e3bbd6072dadd2e7cfcd828b2c9bbb476. 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/ARF096700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6529d06ddce86206868b17e9aaca55fefe158880560ac892803b8fc5d2476465. 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/ARF097000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143c25bb042009e2e2d7cfd2f3568d00845ca5bfeeedf1bae2f17b2e78c9b4d9. 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/ARF096400065.
Daniel Barenboim - The Pianist [65th Birthday Box] - Best Of
Bach, JS: The Well-Tempered Clavier, Book I, Prelude and Fugue No. 12 in F Minor, BWV 857: Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc66028b9eb7f96385fe464b34e1b87a7e296246917c14c4ca552f2efde3665. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBELP0400193.
Encuentro de Grandes Instrumentistas Argentinos
Panorama de la Música Argentina, Compositores Nacidos Entre 1913 - 1916
Salgán & de Lío: Aquellos tangos camperos
Tangos from Buenos Aires. Piazzolla, Gardel, Salgán, Ginastera & Resta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c13948a203a40e0759d315b9b5b6cd319715ed43750e22623213a403e7427c3. 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/DEA809516400.