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 0x6ef050ef81ed2a74fa86cf9c22d68e1717317ef738eeacfbc71cc361a84e4f9c. 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/a795cd23-8a99-4dca-8061-f78f7ef77c6f.json and https://artists.proofprofile.net/proofs/artist/a795cd23-8a99-4dca-8061-f78f7ef77c6f.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 0x7f215041ecb4b320563187e43c6747fa42879ab5bf3b6a982d32d5ab58ea6955. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:30:15Z), 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/QZNJZ2445123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831b5ec5b64ddfd8695ff1a9ec028fba500245e0b9626dafa9d6e3030f1e351a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZWDW2442553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb01696f36101256d97390a5b323d36d8df959f33bb0965c892fb78825c3253. 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/QZWDW2442554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8131a6c641678b3860d7c1f9e94c3667c2bb91c787771bcb99a3cd56a0660c1. 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/QZWDW2442556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f28f081fe1a28ab6178612d873c113daff4a250bcd8f801d2575d713070532b. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZWDW2442559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4c2d55f03ed265579747065769c8165faac1bba29674666cb6005f027e173a. 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/QZWDW2442561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a7651fc4b92a3a5fb8a579a89870a9ce9ea66a9391c2ec6cda61b1932b190. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZWDW2442562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d3e839eebb5659fa330622f0289d1a19c6ce51ae93da8085c14a8ee1587055. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWDW2442565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f2f3a833e5ab7bf597034e1add0247cfe5d1cae724948fa31ca110565bac23. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZWDW2442566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e7508048a43594730791c17c8a65a5f3e35227a3714f0914c3a8a3e4799d88. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWDW2442567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a721cdb2c7cc4a31a02d51ef337b3e16705c9c3f0acc12b2a2cf973f053ea1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWDW2442568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86601cac0b42c556d1611849c812dc83eb2e90a2822ff908cb628202034938e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:06:10Z), 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/QZWDW2442569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19848c870ed8779de76146823ad0f8b48799fa1bb0043ef9430f802fb0fc0748. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZWDW2442571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06e2b72e457bfd1a16e89f37aa0462cff91ea67f89721b3140b0e2f861872a6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWDW2442572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c3a98557b61157ff1e2c070eafb219abc9d2b083e589d2bab1f739beb6bc6d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZWDW2442573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fefa79713e1732e8985c79d642a2b012d385045466368a9a6b11d8123e82074. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZW9M2423721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b86bf26df44549c58a337e408405c23f4a29a79519a0e53e74cdaec7dacaf70. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZW9M2423670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e25c5dd61e1043a95f14f5726e1d0b0bc24e7895ac062bb7057e415be4057bc. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWDW2560589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe945e0bf899460c0df5aded630109e56619998735ee73b4e4f275f01fcd82745. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:53Z), 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/QZWDW2560591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65243c3a90c8ccd59ebcbaa3ef67bb6d1df6f69c5da8021e1795044f7f7535dc. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:52Z), 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/QZWDW2560597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd92b305bf5ad2c2884ae5ff01576f31b1df218526465760b4c6c2a41a8bca47. 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/QZWDW2560600.