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 0x05040ac937325d9d5a154b14e1802083749930660be6bf25bfe2ec9746a4df5b. 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/a239c880-bd4a-44a6-a6fa-ba884c9864a4.json and https://artists.proofprofile.net/proofs/artist/a239c880-bd4a-44a6-a6fa-ba884c9864a4.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 0xeebab4c6da4d44dd6d2f6bedadac7d35099a5acd1b99b1f287dddedc53cf087a. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USHM91680797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe588a7dc8f7a02c4a18151ebb41d0968ea29b4f47beaa3ad9a2de206edbfa878. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM81784841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad72ebaf2c7bf43e317429cd529a5931d3e33545dd0c9996fc658fa91a849f7. 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/USHM81784845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbfffb915aa792d29543b16d1cd640b777e7ec645ecb8802790b31b61ec8814. 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/QZES91974445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3e59bc4eaef810d64807e405aad4e4064f553faaa6e6757aee6aae64b4b1df. 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/QZHN51951820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d358a374d23ac443817abddc03081393e7f2121c207a99a68299047806cdf4b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN31955721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbfffb915aa792d29543b16d1cd640b777e7ec645ecb8802790b31b61ec8814. 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/QZES91974445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbca808a6cbfede2c7db2c8c4a513e37214c753a819dd5bb55b55221c481fed6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZ4JJ1905321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5787065334a68859f91e70b714efc8c625ccdb1784b59b10ff477ceec8128cdd. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZK6M2004907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4865ff3d1d90ae99d14ea7279063ca3a068280fbfe036e169570f0a3b1dc1d1. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6N22345303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863bcac963e3d5d0dfd10f487d1cabf39e823ac1e9f2113d7f99815e6a4ae380. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKPL2209660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a85051c164fc2339dff90098316068a0cdabc824dc2429aa086c8c2c6f49c3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GBKPL2213879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647750886e28628c6d3143ad4a526f505bc6729e95575e6cfff7433fc834dd37. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAHM2352587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf0e6e0789e089be5465f2c69967e76f76af75daa62a6eb82c3e7263d623b2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAHK2370534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ce4b062f9b1768c36f912db8c2c1418669d00cdaf6c7cf57bb9068f4deb62b. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QMFME2209661.