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 0xb0ef3efd5fd39844582f4e725f87d1a0a1e6d2f00a8b7ca9f03b695e6ac2cebe. 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/4ba9b139-c290-45a8-b960-578153a5d7c1.json and https://artists.proofprofile.net/proofs/artist/4ba9b139-c290-45a8-b960-578153a5d7c1.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 0x8db987d08f40bbaef2bf37cea9bd01fe814c466eeeb36f91a8e39d80e2d25510. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FRX282283556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a1262a597a3ab2310c1d98735bc13e1435ddabeb8ccb1e6c1d33fdbbac8e79. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/FRX452261657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd626ab7069e0b5c6de05b584b65e861121ef28115d9be39412396c360caaa394. 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/DEP551962716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09177247aadbcb84352792103b644bc5cab9e27b52ccde82dc75857bbe0e187. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QM4TX2369829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86b0c49d055e84c31c89617ed74a3783c1bb3fde19279441cb0e9c9fd6bb56c. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QM6N22364833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c3270e7101b2b28b731cf25b7c007834a73caedf3e9a12819275c384b28bfa. 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/QM4TX2480783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc8ebe105d6212284ac74a9faaf4e831c2f523da80b11de01ccee9e0b7811b8. 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/FRX452481328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb961d71fe87640a2f6b07d05a9d488227afe3b42ec240121f24f61bdc8d9ee94. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6MZ2597315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36203b641bea432fee15bca39aa202a9a99d370274862aa35426d88bd3810c2f. 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/QM6MZ2574228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e20e22067ec3de8d0081b2432e1b5a97b795f90caa5e7b37e9815446a722bf. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QM6MZ2597330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa99a81c7f58f6f5a560f1a7891b773629f97f2f39237a49dd2f7edbb56d46fb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6MZ2597331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8656617d48ca3578c4e59d0bf2b9ee513b3a17de8e12a1a5117b37cd2a8ed32b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM6N22552080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1fe4b92467010a66fd198dc369652745c941c648dc4b91726c712bb7649a8a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMDA62551288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4889bd873e5e6fc554e20952c6d03297509c78f5b41c22ee2dca936d3992bc7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA052567656.