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 0xd39a74604d1b45e93d52af0116ae1b76802b851c3abddf6276bd9bb72ff1c77a. 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/50720482-0ee4-45a4-8a6e-c26efd4ef6dc.json and https://artists.proofprofile.net/proofs/artist/50720482-0ee4-45a4-8a6e-c26efd4ef6dc.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 0xc3ee9d111d51a0c75176b913aee3e32658ecc3b6052084e2a9a193230da52ed7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES71G2410639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5150e3ba74cb65d9fa4ee9d893ce8d4bc93b1a41a8b34787fdec7ee834ba28b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G2410646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba974551d5d4df1482d8ba62578d12f3649a25e242a35af9c56299c6de2795df. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ES71G2410638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8de25547d0134a04d3bda192948d908b2c9ad65f1d79dbe3cca2836e67c205. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES71G2410485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8feeccec2572eb543a014dd1a7756a624a1d446c980f6cac88a51734a37c1a64. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES71G2410486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf965264b1c6eaf01e051cf9fc46d6a3ee7038aee13f6a78071d03bd856a85468. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/ES71G2410487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b593f5704e5471544307172bc8b3b7f2d0fb29d016737abed7c7fd79a9b6d0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ES71G2410488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2a483708863c9aa4b8945b26a9b0be85efc47542f7616c152f46bea39427a1. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ES71G2410490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3021109c386b2471cb5e0b6c3c1a17d6dcabe52ff872b0278e84b9ed300f504f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/ES71G2410491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691f0431e6e832bc9fc69e9ac893805628b4663e3dcfb5f3a506cf2833492208. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES71G2410493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bb6748d1caafd26de003996f1062c2095bb9bb9986a81cbf2b38877a0fb1ce. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ES71G2410494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb026bc9eda0c3a6b6753cf2102de0a1ea0b376edb8f9aedafff8d2c5bbcca7c1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES71G2410495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef050f81ce62bb0f653d781fdf7abd8a24efed881377e24795e988a78f0a637. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2410496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11545e098a4585131329d0d28500ac2fe81adb19101ad94f4d4781fcd602f0e3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES71G2410497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc483118d891035ef7444edea617eed536c051cdae06bca8e54658c4a40f9130. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES71G2410498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ed27430896e05e3f681ef8ffa898f358e4a41b6b02af7e3f262eaa9207e8cf. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ES71G2410499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0492e0bfa79aed36cd4a91745696b046a9c0d4636232a401bce141c156ffdb. 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/QM4TW2004902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d3ab7c631278111f0c0f43b735c8b043c7647db17c1cffcf08b81fe96233b4. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QM6N22003135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cf451f0edc7811ce2f27d6e645d33a2ad54f30caa665a8a146ac3d3a43a139. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4R2142695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534294b449dbb7a910fecc743342efb7004fe8b147baad2862e1b0a0f9c4352c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM22268295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec46ce472af3a6000884d9920ca4711779eeae775cf9ea5cc12102416dd25cac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G2400648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e43ddb151bec56dc73c02a37cd1d4afa52419a6074590005a678237505ceaf0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES71G2403752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c698c08fe1c1e02552a371746b1a21d19155e11ce8c1ec731365f85b7ab393. 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/ES71G2032814.
Mix Gilda (No Me Arrepiento de Este Amor/Tu Amor Es una Trampa/Fuiste)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1433b32f9ce5a11d792a12442277cbfb9271ecc8981894c254a50e032b7ab797. 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/USLZJ2197850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668e509f2ef45ccbaca43aab81534dac5be44b385d454cf5e010737e3fad8777. 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/USLZJ2197856.
Hasta el Fin del Mundo - Versión Acústica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca43da2c1f1ce527535df5c0b3354c6dbd4a9f34bb82bcb378730d8a1249de6. 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/ES71G2102983.