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 0x917de1d44f794bdf970a257da31994f57af8c64b5dde38d45e9f5b89e01f6583. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8b01b58-dbad-40dc-8f4b-75582f975c54.json and https://artists.proofprofile.net/proofs/artist/a8b01b58-dbad-40dc-8f4b-75582f975c54.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 0x40b790ef9e17edbba5f4d286b217a9b9388e249d974fa30342e4dbe3cd8baf0f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:04:40Z), 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/QM7281552898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ffe44d6d2bdcbbacd9b85c2f872b1822521215a703974538fbad8d5b4428ca. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM7281552900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a05c18454c9a420dc6d856871f83a1ebb26865dd422a3c8259eff7af339675. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:13Z), 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/QM7281552901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3938a0c630aabc19025b81652ce3bff6f864333bcfaa3cb69e95c06da3385e2. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QM7281552903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741125a216badb73450266662b9e06858d555ef58e584fa47109273b607849f0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM7281552905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831b436f2a15f9039bc005c5d906b5f4cc0703ba79d3a54aa1b48049634fcdeb. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:03:01Z), 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/QM7281552907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5791a311c4ab2307bc7ece495ed2bb7a4e2eee82b7907085d6c7574730639149. 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/QM7281552911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b880b768ec0f577c8a97316f7178971452819798642ab73d336ecaa5d92ca36. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM7281552912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cefa2038b1ea6ca04fed579f54c0c73b79ffb714b446133eeff68b0db773c37. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:24:08Z), 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/QM7281552913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413b2f65d7d0f5279282e3e01a3fdfa713af2c2819471a5adcad91b037437d56. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM7281552914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe381659a0e3bc279a33c52860c2b975f58985c39d2ee0c65ff336224bd75609. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QM7281552916.
Reto de Bandas (Banda Sinaloense El Recodo vs. Banda La Costena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3ce58731113da7d9f67222f5b8c9431db5454262ebf319838c651643d34848. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US4XG0303497.