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 0x7203023e8f83a054a539a4e061cbc75119ac3c24f61851c2f929eb81a2749abc. 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/1e2d1802-97a9-49d6-92ff-92f9d8dc685e.json and https://artists.proofprofile.net/proofs/artist/1e2d1802-97a9-49d6-92ff-92f9d8dc685e.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 0xe66c09721da813b322e68f5a05a847fce7af78df26f10699d42bf84cbf1f5f3a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DELJ81768577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c9552adca443397605d02049a0fa98aae7ef3893856880183db0654ecfcb78. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DELJ81884418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1925824cf092df63bf86059da3f730a3faa3b5ba8605a08505510c14fbfbf7f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DELJ81932799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa936b9ef8c96d8807f3235142c7e4bcb87d489f1cf110b955f491aa035b84714. 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/DELJ81932803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25263c2f89da394641da6872b748f3ca6b90b8b342d85e08a412cb6d3d64f1d4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DELJ81932805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7de0119e8e43b92fe5d7dc1f35c24f0d00d4f5f45ca75721604e45cb86c4cd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:38:14Z), 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/DELJ82076853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd0dbadddd048e505ec0b57e86b59dbfff9b0d8654b0a764a0b14a7d16da802. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DELJ82028794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf586484aeef7ee3d5e60de365e03f75179bd9205f93dd09e6a6e85af6fd647. 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/CH7812107295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dfe2ba2d47f4f3dd7eb5b038a4748bdf8d91ebe026bc9e18156587b7331cad. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7812370234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3880d87bf0b017e0eaa8b4777c6a3f9b819b05e554a1e5c49df9c53763eb8c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CH7812370347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad167f186dac272ce1a60ed87cbb39f64003cf17fd95f0800c2a3236a73a97e9. 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/CH7812370932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7030ee1f44465e9a498e3770d40c1146655e4e9c61d228b9dd54fb1e9bcb9ac9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7812414747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddc11fe7ddff2f9c6638f6a2c7cfb6f9e7c721fd9f4159c763c6302a36acf97. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ESA012513702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe17242f475ba63ac734c2a8952c2749b750f203da9feaab7f25d047f0feb39. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DETM41610387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514af1e65432eaeb4496ffbb6b907653ee464243e1ee39fd58fe3cb987c4dabe. 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/DEVY22100058.