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 0x8b91e8eb69cfff63189fd55596b3f9b7bc2774307210f8c1c7c55ed6cd0713d5. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fa5c98e-7382-41dd-9e48-55b64b18d8dc.json and https://artists.proofprofile.net/proofs/artist/9fa5c98e-7382-41dd-9e48-55b64b18d8dc.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 0xdf6675ad4fc6971e36213c0ddde3c9988d59fbf458227c78ef33f87e8483c5a0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKQU1763696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6863c8fba66e0a053a72a310cc54cd52e5166a62fa443d293168528eecb379. 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/GBKQU1967061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9bd6acef272a30fca3edc5a28c02d9c3972bc8053fef1e65188243825edd10. 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/GBKQU1710295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d297d84bd2b32412ae1aff93da32ddebe510e17ba06e00dc59a94570bdf6626. 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/GBKQU2031024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16180a532e7254732519083f4bf683a630342f833a2bbb89e2b03b68d01aad0. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBKQU1561759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ad25d7d2a4103685e3aaba6558b1f843a28240a06bc0d32ab4ae7d45dfc59e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU1561763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792a101ccddbe1b577ca1e5c2f8aa41b5ffcd08a2962fee1b782d1a4a4dc7cd0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBKQU1561766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df0f6a07151e55972907f5ab25a2ebaa3edf515084e1bf3b073413e27d8a22d. 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/GBHUD1300104.
Invisible Worlds - Aural Imbalance Star Trec Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3aa9d38c6b715a6e07a8413e8a84fead83528dbbfd1181f9f64dd0a5b416fb. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBHUD1300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fa0f5da77938b78aba9749f5fd392f4c9a6f9320a4d6b5e43b8174e8da3ec4. 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/QZHN52062407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad2958b945915d52b0a756d7b12206168529c17bc1dd0b06e2228c96df286dd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZHN52062409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d957c83e943e8b2909fb62451192534d630e4adc743769e899f48d65dc93f1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZHN52062411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17629006b421b4d4b2ab2e4dc74a020180275bbe2c1588df06f17d085f98ccb6. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHN52062423.
Space & Aviation - Aural Imbalance Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa018f04f7353a54d25e1d6f88659a389539fb7be9c54f5cc7a6ba25d6b507cc9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZHN52062424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8d318394bcd4911c026828ac01602b7db1ae04dadff6691ffcb1adc1719a50. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBHUD1600277.