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 0x1471ec5a1a17baef372486afdf40eeeebdb9f7acfa91ccb03204e2e3efd906d6. 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/74d14022-4016-443b-a49f-c871f01da733.json and https://artists.proofprofile.net/proofs/artist/74d14022-4016-443b-a49f-c871f01da733.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 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 0xedae46bb6a582e2005e6d5a722e9cde3dc9c6e2288a67e2fe45bf1de0537000b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ARA590901119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974997d0880b4313cd9a8d9371c73e9e8c3f025ab3fe3ccffcef188aa1ed974a. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARA590901120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eee9131138ce106c3155ab09476a9d67a6ef15e2b85e4d751d13a7084c70b5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ARA590901126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d7c2d4be38a26071ab764d194eaf160a49888c791f18400938ac8f2dacdabd. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/ARA591305335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c575f0e71ac8f2d6623c2a6ee41ccfb81a91bfa68109ab784a8e51e2dc8b8c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARA591102486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29af77caf69e68cfa8f0e60d0cd1fe91b68b90bcb260d213d89cb1072dbe655. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ARA591405215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d50873f1d21ef79ceef0ba7c4e70f96c2d8bfdd36f1edfa10187a28661b806. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM4TX1545203.
Zambas Carperas: al Jardín de la República / La Humpa / Mama Vieja / El Que Toca Nunca Baila
Zambas Carperas: Al Jardín de la República / La Humpa / Mama Vieja / El Que Toca Nunca Baila
Himno a Cosquín / Cosquín Empieza a Cantar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32cca361d1267108b2e5a1406f1e574ba2dbdef8c0b793f5e779b44c5c89856. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AR4MK2100173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe8bb7951659f4630d5c7a8b9871a18bd323b6f5f419a06cd2b0769bdfeafc2. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/AR9VI2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccddfaa3189450a6abc14cd92196191cc18978175fa7525cc6d794dc5cc0772. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USHM92193781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50797f1c6decafa85e50d554f6fdb5736fb83facfe64d5a3eb6394728c30c558. 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/AR9VI2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699fe338505f56cdfde2cafc2748cdad554e66dbe64f80eb492644c271d1546e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AR9VI2100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f583cb16b0e3bd56777540c8d64707486baa6820e178a8e0318f1d57ea623. 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/USDY42130356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b86910237994c02b8c5dfa9594a36827de92afaa525709c45eb967b0ed75cc. 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/AR4MK2000166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4264b46a01cb93dd385d18d57050601a17174a2a653fcc31e833044a2e7d209. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR4MK1900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a2979616a631b97234cca920fee8f15aabd15a8b329609dd6538c094024937. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR4MK1900144.