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 0x6860187d8fb7ec7635fbb25f48e85fa83ccb6328e2332ae99885d5416cf316b4. 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/84aded22-de67-4d2b-b5d3-59d77b34ec78.json and https://artists.proofprofile.net/proofs/artist/84aded22-de67-4d2b-b5d3-59d77b34ec78.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 0x55e3515043bd5731ea3efc344f5132632f33d015d5afdd296eb2ec57e7342d47. 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/USHM91849238.
Mi Corazón, Tu Habitación. Inv. Catalina Dening, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e62e2df7fc4be1b791c52641759b83e5da6c8893173b61678af48501184fb5. 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/USHM91849239.
Mi Corazón, Tu Habitación. Inv. Catalina Dening, Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148bf7f088bd3d8595168a58933b2b0f4f869ee3b51bcd84754d3fa3e1ad0adc. 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/USHM91849240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103e611c623ff1807fa7a11461991eb693bc001d5ddc16f34af34d07352bcddf. 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/USHM91849241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce471c86af36c46d24b44572b0ad192184f0630ae6d54b41f5bcefc20caf162b. 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/USHM91849242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d1f43b4d00ec2a7dea038856eff8ab0d3df9d3810773fb19c8cf38b55f5a67. 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/USHM91849243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322f653a9e4221d8449ee0f11e609b720aa5860864592b6537533fddd7825e73. 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/USHM91849244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239e1abc8a5d53d96376f1fedde43a5f5a65b22bf8b332c0a76b92fecdcd64ae. 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/USDY42388652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf62b936f60c76e55170a7b811b68828c11d8593ecd4b6be39bf3d0bbe557532. 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/USL4Q1982510.
Ofrenda de Amor I Inv. Josue Lorenzo, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00223a4c09ed6a83e21374ec6ebd5dfcb5c3c2cb855f6ed91a4056d73a99e049. 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/USL4Q1982511.
Ofrenda de Amor I Inv. Josue Lorenzo, Pt. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7843d3b3008cea0d69dd6e591c5dfed970ca2c4c487e96da19c7bced46aa74. 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/USL4Q1982512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3adf5c5f33985b4707971ec5ea29694da1798caf3e19c7de9c5d8140bb6b9b. 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/USL4Q1982513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cba323c767b8cd3d948289632a5e0158c5c0be7dfeb29750a77a0f0eb2ba889. 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/USL4Q1982514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d691761e8e41dbfa478f1021b386c5d00ac1994417ed0728e13cec829e0e0ef. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:07:41Z), 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/USL4Q1982515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dd794c94da9ce48cad10b39e74952ce46a5ba17499ba06f6c033b71139518d. 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/GBWUL2127599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7880f5bd92a7ba96f67c7675ef4fb6a8a60173f7fd2369f7b89447d6865d7f6e. 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/USCGJ1627223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0c61b311106c8ab464d318471c2bbd8af037ef6cc27bcf61f959860c5eafb4. 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/USCGJ1627225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb01c17d1d703227a5b431a89e96c9eee70160cfc30a2e9cb9aab8af9325a1. 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/USCGJ1627224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c54929e2d9946688cf9e9f34ce818c9a6a7682b56cab245992db1f54464f0c1. 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/USCGJ1627226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e98418c45148e474d725d0d72462bcdf4e05fd4f5ece58d1f9439e8cfc8f89. 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/USCGJ1627228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd906d481472ed99354caf2108857c15c0299d1ecef69aa616c007a6ac34d70. 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/USCGJ1627229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae2ecd7b8673f73eee31b7ddeda976f680e98f6a82151e0e6581a78d476d6f7. 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/USCGJ1627230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f657954d331301e8265318e1da1bfe3818593822a5f756c28c11cd901d0bf3. 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/COA7W2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f9dc10ca2a7162780bd96ea5ca76c0839ee53708f8d3c4c42ebf1dbadb646b. 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/UST8K1690711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbacf82b86971b50a629039d81f241e0a7994fd50297790ca1034e4ee8851c61. 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/UST8K1690712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b5eaf82e551136782ec9da38e62455858fb89fce6f485836b82368a5e5cd51. 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/UST8K1690713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570c07e90962e270c31ca5522890ac32d726d5cef90e15d18303103addc7d89b. 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/UST8K1690714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9dece1c4b903b0648fdb97d173e7067e57aeefbf16864ac37e74ecad7c1af5. 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/UST8K1690715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e507f108110e9dc47981b6af40f9394cab2228d28e65572547dc53b25e4e10. 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/UST8K1690716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba629d9364bd79155d45d8924fd48be92a6d846d5f7286ee7c15f1ab778dd440. 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/UST8K1690717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49245a6fa5c977506eae6c4f9a16a997981d9e1b8c6081d11081a22bd6cd2170. 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/UST8K1690719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf2e7a22e6e66e19a3e6c5b76610600f26839ca4b5fb237581f8e021aeef120. 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/SE6HN2030718.
Primer Festival De La Canción Argentina 2021