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 0x605d03080ca46db96e4c886c759e44d81cad565c75e65580ede161c53ceb3051. 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/3b39ccb8-57ef-46b1-a0a4-f2564a44d12a.json and https://artists.proofprofile.net/proofs/artist/3b39ccb8-57ef-46b1-a0a4-f2564a44d12a.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 0xad5a5d29d104ff00cade8f297bc0fb622218475e6be5b22c3915658fc49da0e3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PEZE10400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b53b6b585707c289c3541868eff71a241acf395c5529c8a6f70907b95285255. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PEZE10400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf155d791ce844d7d19b2ed6941701f68aebbe96dafe6332621fb24a721439bb. 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/PEZE10400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be07cefd6007a8d3474cd8ff616d8d778598f739fb0377e1a11f0a6ad0ca2c8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/PEZE10400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c757b11499d9659ad6be64d84c15de42ee30293e7a27b3b5fbc7318b8670973. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/PEZE10400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb47dd674072486b7b4ca23bad73511a4d858e448bb30b7254a840c5b6779aa. 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/PEZE10500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9930bee94766b46c91ab6426b64de9abb773a23dba34996667512b256bfc17f4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:56:54Z), 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/PEZE10500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf100055a96150b537f155b3521087d00b5f0b08920e07f170848cf9f07370bd6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PEZE10700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ccaf3b01675592ab97926229a0e72cf9b15074ace1aaaa3a47118db40c2673. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PEZE10700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d196e8873a036e0b5352e4ee75a362d7d237815a176543c4581293823aff64. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/PEZE10700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564e3d2a5c1761b92578da864ed80dbd455da840ecfe4fe42b3f143fd5f1f22e. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/PEZE10700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8033e58284cb330aa8077ee08ccd553a42ab3fb76fd1fbe759783e379af93c. 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/ES71G1623051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da6459ac51b3849aff0433556b77f685d4c2c8d5f1cce2b55fce08bf18668ed. 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/ES71G1623057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea40be473905eafff395758bca0fb7809e00c7fa0e16ebee2e3caa40957d2a4. 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/CLCZ21401392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ff5785ddef16d196ee7382454c4245e9c990aa7e3aae354c598fda13fce313. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CLCZ21401393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b50a8dd4272b970065cd23dac8a89978f8da013cc662a68c1e931dc31b6015. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CLCZ21401394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3992984e29b2bf85265d04b4f53bce8009bc970fcc8953a093a0c87173df771f. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/CLCZ21401404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50efc047bff8fc6cd72082c3c12aeadb0dc306a1114f523c607bbd03bf2a2d89. 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/USCGH1584808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1bfdb51cc23635eb5563701949a9ff0d7e3a1c7166619203debe31d819ddd6. 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/USCGH1584809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315fadc6f34bb1eb81efb9dab55d865472a274b99ffef08c3e279279c42108b4. 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/USCGH1584812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1acf4f4789b1909dd86a605ae33b6b256b0c6dd6dc974337a5163ef48e68f4. 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/USCGH1584813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8637f213efcc0f097086408284385d909f5347fa8bb5931a5353f88faadd2c2c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USCGH1584815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb723ef0a8001731fef1ad7117acc6ea519cb093db8e5ac544568417168e7f4e6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES71G1757219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e96b4cc7e7afa34ee033bb7d47e092c1225c02217b87e772c90e8a3147ac0e2. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:38:30Z), 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/ES71G2039595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4391cd2cf4910b62dac69721c3015222db7dacd5429e0ba588e0b5dd25f06c05. Chain 2 (Bitcoin): anchored in block 957556 (2026-07-11T11:14:07Z), 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/ES71G2059165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4659d0db774765b20b86404d42210b96f7e3eafeccfa44e665f27fb6cb239d97. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES71G2060389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc329fad523b4a3fe979f1bd8ad2374028f3127236bc91084d79d5d40f5ab8d91. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:59Z), 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/PEZE11707008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989961ce4e3d65c98541b27eb156a134fd945efe785e6f264f79e5f572aae0e. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/ES71G2420434.