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 0x5f0911dca418603fc9988b41d20b4e40bf4eb85b7a0b7512ade77a6f5e08377b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6b448631-fbde-42eb-90a6-639628041faa.json and https://artists.proofprofile.net/proofs/artist/6b448631-fbde-42eb-90a6-639628041faa.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 0xdc139f438b19616dccd0387098b38eac45033b9986f97f93ab5a802fecf451ca. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CA5KR1912005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e7fd33cea2e341c74a3da2d5bec4ce7d250233e13e7152cd9d31968b6ea1c4. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:45:16Z), 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/CA5KR1912012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74a301abda18048a8bca41df87c27f5212fb6ae9b82856a4507a965b446f812. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR1912040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79d1596ef43cec0964fee33e33d320dff8c326359ecc5d1279ceb7753ce371c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/CA5KR1912041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1541bce905ed1b51938faffb1ab2a191777d89cdd33782735304b83591af600c. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:43:12Z), 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/CA5KR1912823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db15f58911b4a654e010c3dba37705ae7e479a0f48406a314d856da96ab2d6b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR1912762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d78d8de9bc06653338b38e9ec8e06d45ad733b907fb56473debc5425c0d38b. 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/CA5KR1913545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9db736e6a322d327b66c3e811014dd207dc5f446a2e4d3fa9d47182ea90d6cd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:28:00Z), 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/CA5KR1913553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f89386be75636f08c2de61ff12ec3f4d7b96e50a914a4bfbf03b68eaad0d9c6. 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/CA5KR1914740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ed335a1d2ae82d31b146e176330287bc4e592dee544d9a198baa824c663be. 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/CA5KR1914746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807087261d838b5cf7d6dbd85c39a77cbdf5bc223ea191644bc74e6cae1243c5. 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/CA5KR1914748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a2da90058f57b1c37dd3bade96b71bb73f69b08064f32534b1f72a744dbdae. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:04:07Z), 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/CA5KR1915437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdbfdf1722169b4ad8e9aed4eb56ca7a3d0e8a5defe6ad40aab564a37395854. 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/CA5KR1916585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4947bec18e56787d555d58c3b3902816118c0f3d697e8758ab914fba17d827d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR1916592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fad755a6acdcd7335da85980b786ddfd1aef5dd417a2431e5ea87f3f243f1b1. 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/CA5KR1916599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4802f83757613365f2bde00e56fd0d1bee0cbe6767295362637bbbb0132e8e. 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/CA5KR1919347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1a4bc662a37b054da4e0551cf93ccf8245e1058494b843d3f63e6b90fa979d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/CA5KR1919365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ff7e28fc12c868264c959c20eb1e934db3c54c84c71e5aefeafea82dfaf74a. 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/CA5KR1919815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056e7066c103cbe46fd50b34ade655a81ef22d571419d01e5a9c53cb5a571f13. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR1920348.