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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20bce51143d0ad30618f77b107e224a9847e2ff6ea20a79a570e61dabc1d787. 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/6fad7360-fd8f-4b96-b022-805794db5ab8.json and https://artists.proofprofile.net/proofs/artist/6fad7360-fd8f-4b96-b022-805794db5ab8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e4307835ae91424bc61a2980926ed2ac8570881a8bcc9a7505676c0bf5bd69. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL5MF2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500d0ea28844e8dcf5cb1e1fd59da3047b533b6491aed306e14c85fa13f3ba7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:47:03Z), 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/SE6QE2369144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b2da230254709e247a63c25c76f75cfc772c6d0a71b9181c7c16acb39bf8a9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2369147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2312afcb148bfadb6ea13ab895078afbce1cb5156fa3a6332401e6ce34dedf. 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/SE6QE2369150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3002d5c0f4ac38d803ec36f58b70354783fcfca3df2c43c546615aac74f05d64. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6XW2405015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cec9bf73b63861ecc202552656e9bf0c13fbaf165b90094b11752e4c3ba8ae9. 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/SE6XX2502499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbb982b5f0c4d1e80970c74d1be69979b22053ac1a9287af29d49dc8a18d9fb. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:47Z), 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/SE6XX2502500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e370a25e2331663a7d308078aef9f59a2714a010f1751efa67277b0d506996. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/SE6XX2502501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6124ad26c20c9d79f61a95a486d8eb8054f7f7db27b6a9f7c914488930ac8c2. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/SE6XX2502502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204641dd7b54e652e93a8c24d8a939f87c12ae0ea7a70abda11af67c771bd875. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/SE6XX2502503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5683ee004737b2e9ecfa405067dd39954c5bddf95efc2ebacf55c2f442ce064. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SE6XX2502504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3a8a08af3b9aa050963e0fcb132076eb42c10a08abe83ba0db64caa942adc6. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:25:13Z), 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/SE6XX2502505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58d1b0cc03d5256e05ab401ea7f40c36c433beea52ba38ab108996c56b52bbe. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE6XX2502506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbef9fb21c447667c8374de3c2504300e0f5539fa5a1bb8beeac99b2efd34a53. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6XX2502507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed84ff6432d34857f8fca149e580eaace793e530463023c8317263b354bf09d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/SE6XX2502508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd9b16ecf87c0b5659f5b994ebf8a5b1f0b15421a2b790c24c4ec363e003e82. 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/TCAFJ2177027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67bacbbb406f0d5e33b12bdb24941df0d081044e760d78dec1fb7d682520c2a. 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/QZMEM2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720f7fb6551d4191796814aefe651dc452ee616dd56ed8a039b35374fdd52c36. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB42233221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b52186b0d89ba95e46ce937ee65a18d21b4c5d7ee4e1a3822437b2aab49d91. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZTB42233228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0abfab81c4e0fd79883f26d606a81839571168f3b4f14f835ead4f81f9c5f9f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN92406768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762569dceaa22db72fb360e6af21b53723f5378ac506e17f21ba7b5219f713bf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZHN92406775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc134b830d1a562212b1ca6f6d293cdbfff4ca1dbf841a222ce826008ada6e50. 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/NL5MF2100621.