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 0x3db742fe37b1c59c6937281d12b9d84923c3d227b22e4adbff91192b301098a2. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b04102a8-63ab-4388-bda9-ee92cee0b622.json and https://artists.proofprofile.net/proofs/artist/b04102a8-63ab-4388-bda9-ee92cee0b622.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 0x4207c3161d172c908c1c9cbfe9bb27f5dee49a02a411424a61ca8837e73ea1bd. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FR92U2200550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3c7d13ade6f2415e20e32730758bd9ea187fb87ffc0312c80e6b84c042c118. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/FR92U2200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12676712c9720ac5c77dd40e7a2c2cf0a74a60e5c1350cad29b18a2c042d481. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FR92U2200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0712735c60c1b6490b3f7e22ff9571502ce6303a8954921ecd2decb151cb8e89. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FR92U2200580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3a08b2c4869dffbb4e98f51bb447f62c52cc2981361c9fda25976fb15dffef. 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/FR92U2200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0b16c9db8ccf524dfd6e2ac63d681b882209f5d31f40a246ac9c18bb23bdb. 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/FR92U2400990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171d330924f813ffd8678669a76624ed2a86f236cee9885724b0a28e4dd13dc6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FR92U2401000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0484d972a635e380b7be0b8a6903c21796e7a249ccf094fbe68df3e41e1a94f2. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/FR92U2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71fe2d48b7e62e3f8056915fab364e46ed5e5f267f2834f920640304ddf1d6e. 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/FR92U2400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bcf25396f08f807b212e40b931fba083276ee86cce1d8f2e2ff8917cd8c2b5. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/FR92U2401020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753aca177821646c3f082b4123a25ae7536c1ca2d4c65c26f1e2e070ca351a90. 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/FR92U2400440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a0945bf5572a9b471271f57edd16eba68e3c388494e7b2691cbd3f76a1c2e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR92U2401030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f5ef78a001676257ba94ce623cba084b197cd2e9be7e9bd8e78037d2187551. 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/FR92U2401050.