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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91f2967cab3e9af0b1010e7b0d56b31ee082d14d2f2742b3d1cab428249b2f0. 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/3b7630d2-2933-4c2a-a98b-3c617a5ac9d5.json and https://artists.proofprofile.net/proofs/artist/3b7630d2-2933-4c2a-a98b-3c617a5ac9d5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7308015d9245e41e341eb585fefb2324270f5ab2d49a11d1314c977cfcb13938. 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/MXF171304542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277f736c48965fe066628c227bee85fd54f28e256c1bbbb3f08df4e927696d81. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:24:06Z), 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/MXF171304646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9829a5aa1509f40afd4148482a5d414d0b87084ed226dd316bb8fab0d208471. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:06Z), 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/MXF171405880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2421ec0f2fb8579933aceb681f7ea051b795eb538b195c61373e6e9ad71db97. 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/MXF171405886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d41687c157d284f438c2a3e10d25ad092c215beeab2cd21a6dbf1d2a1e35274. 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/MXF171405889.
Primer Movimiento de la Sonata Claro de Luna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ccce020bfcd4a8a57b40c7a06438ab8e38a949eb762c396c5412feafe53a72. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF171405921.
20 Años: Ejercito Zapatista de Liberación Nacional
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbefdceaf006b4abb4a37d3ebeffbc64a626b41d8dbf96f3f821c98df9ffb3d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:36:53Z), 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/MXF171406419.
Merry Christmas! Acompañado por Aldo Delgadillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be936f3bd19ee8e1cb9cd9047f770cb38f79d5d965cfbe22e896419b5e59ba0. 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/MXF171407120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2944f033c7122603c18cc4848a7345fc4c8bc19eeb4e37a4a2425cbc07081366. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/MXF171407155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5ad9d59d387cf7c25a5b29aa6a4f101160dc248eb7cab7c13b6a95fe333e66. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:45:11Z), 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/MXF171407159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96df5c8ad97b4eaf0bbeeb329ce445c043d9aa2f6ea6ac498385736ddc5923b6. 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/MXF171407167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57b9002c1b62f0ebf985618cb892a2c8cae104edf8519463ca5cacaa0bfa632. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:18Z), 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/MXF171407171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a6b49a84b5f2db5b2a0c646e78d481d6ff789ebaf45246401054a55e18c716. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:31Z), 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/MXF171407181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7bf6e08c04ced97815b99e66f0a0529a723a5b44851e970e57f9be9df5539e. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:36:09Z), 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/MXF171407184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213e98060bc50cece5f2877dc55cb0cfb90a39d545a47148db1981012d2edfac. 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/MXF171407726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118c60e4753a5092650980555f6f2febee5929d1c57cbf9472018f48d99cc05a. 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/MXF171407733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e9a3f47445749013d0cdd275ffdc4c3cfc7d0df32af9a508be66add75dbacc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/MXF171507991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c495a87589f67c5a0be4099b6b85adff112ffe239c714e22ceb1ec89ba3da5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/MXF171508309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b85eef8565cb6be26d513000fe12ad6b206d68c55fac97309e06f6242cc131. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/MXF171508561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4833e414fce09aa5fecdacc453707717c3d36ccc61b119a573c4db6bef37ff. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:52Z), 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/MXF171508614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a69a1946d5948d39abd5d0b24593a079347883dbd57815e5f5d1ba7f23fab. 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/MXF171508649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce79ddc66c54a30a22dff2d7dfff3d4df9a76028fb15822c72d05066f74fd67b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF171509225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646ed2c8f849da440b7c6111ce86dc0ec7f4ceb00660ba75bafdd72c147e66fb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/MXF171509289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2c3afd504c1fb8926960641e3a0e9676a6a57d355414b74dd3faac1420a861. 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/MXF171509362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff4bee0b191f63c74ee827a47ed7318b340500c272df45ae62ebbe0fc58df95. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/MXF171509366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacca90251079d4378cb8471a1e6d9884edbef3476c4060c8f68c3f0b90614087. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXF171509373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef962be3ee270055d5e51dbe2360d9d8420e31c7bbbb9057fcc4f168a8a1151. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:22:12Z), 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/MXF171509375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75748eebcf60307204eb1cad910592c98eec69f76cde0996278aea5e9883ee28. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:35Z), 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/MXF171509376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f0c059ce0502b31ca1ff0e6113668fbb94fe11ff60948ea293ed12294b1f0a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF171509383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e14f770f5e2dd4263c73967ee25277a120c69aae551b42a2edb350fdd20392. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/MXF171509610.