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 0x0626fa3318f74bf6fcd10df538eb11074eae8629124f5109796afdf8a31a16a7. 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/c263c06b-8e4c-4a8e-bcf1-7c278bf4ce15.json and https://artists.proofprofile.net/proofs/artist/c263c06b-8e4c-4a8e-bcf1-7c278bf4ce15.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 0x356b1b97022f8df643b27cd4772f5418ba42e7d861fc66842ac1122331cbab6f. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/BR33T1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ef8389389576f284abb1400c542deca52aecdc43aa0c2e324a182de9eb477. 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/BXOIG1900001.
Dias de Festa (Luê Canta Adoniran Barbosa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9f2b36dbeab2a36a27fdef5f479cda3acfe74c7236d5adbee6b6bdb3d77cb1. 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/BXZFL2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c969c83948a24104438a5d62772fd1680de40a283126eb972ac282614efed9. 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/BXZFL2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9f2b36dbeab2a36a27fdef5f479cda3acfe74c7236d5adbee6b6bdb3d77cb1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXZFL2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2ea4c14f01c1c56c08ec050a8b712738b730fd8d4ee9495ec9d78d0dcff37c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXZFL2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f71a073a21fe28e380b7fbb70e84627e1c162b341f9eb972b5aedd2f6a358b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXZFL2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea14ea9dea22fcdb4e8f504f85e0fc5d69535fb4be207ce6c375f53cb6a5554a. 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/BXZFL2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd13425a09f29d75346cab285bdf19861e4de20097802d650d019031250a9976. 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/BXZFL2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ab3cfb7c7a87458bcf2554d469506a19cf59fda7df4bdebfd2c2ee163f9378. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/BXZFL2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de89ed4360d90261f2a276defaabe50c25d0061a113ce92bb7e5e9b336a00ea. 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/BXZFL2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c886da8ca57975c73f6204678bfee989faeb1a7948ad70f38edbf0863f77cb1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXZFL2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2906aa6ac9a39048cb102f1be3dfe390cc3c42ce04b969fcb1b5168ca0d7095. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXZFL2400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50f5c4aa778be752b4dd39b48b78575cfe855486838bcb9cb20ac3b0c405108. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXZFL2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71eb6a05d1707f2c23e7bd12ec77698ffdd2124e81d6343d83ae9e8da973c792. 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/QZTVM2543096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6313090a25e68a6113780d2efe14b0056f11ef36927493000f00ecde369cb09b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BXGOA2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705be67841251f8498c596048d1cbd812b19483b70ed583931119a5561618f30. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRF6E2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40120c5b440f26e3eb0baac8826f4fd746abb4cc661d8583b0befedc406ea91. 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/BXGOA1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6794c67722a1b3a623696fd29c0a0b0e4bd1cd4764c8f24874deeaa37d51f5db. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXZFL2100079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265f1a934504803c64c30cf8ed123b4df770735754a55d64abd971452466a305. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BXOLY1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe27b474670528c8165c0af212e4fcb25fa42b7317393e82cedf16451599b2f. 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/BRSC41500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5089f76fd915b5b8d6f1ec8762c28eab2bc04be1b600338482f101ec7e25dbec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXZFL2000014.