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 0x595c3636b28017a652d74033d215889e2713798242ea59fadc5bb20fb58e6d6e. 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/97c535c5-f3aa-4ad2-9f74-4e38541675eb.json and https://artists.proofprofile.net/proofs/artist/97c535c5-f3aa-4ad2-9f74-4e38541675eb.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 0x099f7f34bf089e9cf94c50025c5c67b49cb95a31c77e988d45d4eb347fe54868. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CH6541838328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62129752e904ca53f7163d52972861c27f1dc5f23284dab6b98aef81494f43b9. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR9W11924898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d5e765c721cc0d040eacc25745cf41aee07d1816b89c039519690af6675c28. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:40Z), 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/FR9W12026718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e41eba0de132f4f80a3f1a9a39e5f36940aa640141ff9657cace565668e6df2. 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/FR9W12026726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dadf8e36eff61c3b97b0c12440b6fb43cba685c76f0eaf60d53929002fb7dbc. 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/FR9W12026720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e059e316e6daa448cd62a3ca293c5828ad08430895b9cacacc262e46516260. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:32Z), 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/FR9W12145485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32118a3584bb7d4de23c9555432ca9a9e78d7e2cf7ff92361d0d2b8f69e2274. 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/FR9W12238024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aa5af6cccbf882116fe7c824f28e4b2e1ceb27d071eef9279edcf3cd92f3fc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:44:16Z), 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/FR9W12241918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b0e934e0865a089a65391c2c356bec739b4bd2fe1651c7214d705abdda24e1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR9W12238026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7734abfd5d1c370cf3466e170cc964f9229afd3381c66cdb0231d189e1dd2ed7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR9W12238029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b6adcbc914e8ec64ad171da81ed7877be470d015dcd3f85c09c366705544fa. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/FR9W12237180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ea82566490d2e1cf2f94c9cf28def1730b0b5226d2d7c7b70d2ced0373bc8d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:50Z), 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/FR9W12240252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157ae323c7aa00043e7a4f2cdcc768f0a7223dbee4aae24fa7490f3626a1b8ed. 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/FR9W12238025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665ff4e040efa7f9f2b8e7919e5ecd0b018fcf8c464c59b1b5a3df9d68fd8843. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:37Z), 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/FR9W12238028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464cd277fa6e5c63d577082873824c3733058698bb4d04e22eef443de2c8e2e7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:27Z), 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/FR9W12350862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1d7004b28c92b510133466a0b31a88d3160fd106481135b4e2df90b04d3854. 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/FR9W12426031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd21c73943595444034b115c156254edbaa9c81258e83e60bb13ddb0eaf5527a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:57Z), 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/FR9W12450593.