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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028faa0a4cea12c22616ff999a6b754a1582c2af7685302b1121b6b01a4d032d. 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/00dba0bd-ee86-4184-9543-7dc4fb55839a.json and https://artists.proofprofile.net/proofs/artist/00dba0bd-ee86-4184-9543-7dc4fb55839a.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a23813d931b0403bd4e62a6e5e70dc3ec63daa61e0f3240b428d6e91819354. 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/SE6HN2059969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb140fd009d5691824f0a227531ea19d72540b4124cfd7b04e1543bf9d51bdb0. 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/SE6A92082688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c418b3de4820f46e7319fb62904aa8d037309b3355c9ce90fe6426f07fe88e5. 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/SE6A92063523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8272368742d1b725b66e73856760a41bebc643c0e63f442fdf94eac13223ea58. 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/SE6XW2179930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e342792b959ac70e381af16c6532c04856e1461e503325698d03a74fb7b3724. 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/FR2X42262771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ac77483c673a079a813c8c94d3b20e64a1d10de2ee38ae2e64aad8817909f6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/SE6A92171338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8272368742d1b725b66e73856760a41bebc643c0e63f442fdf94eac13223ea58. 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/SE6XW2179930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6b64a7e231fb5b11ce1b861637236ccd7fca5360cd39e4b72b3cf30d8382e6. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/FRX452277171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f99a3db6eebdf8bfeae72ec42bbf6b7d891c3c706cb2b4bc5e8e866ad472ccc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE62M2103175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22874dae7ece9f27d9a80b4291d9c6ed9b1f719f514451d13be3945402ab43d6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR59R2280121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f64c0d2c30748d97c2dd2298ec98dce3a1323a7276f356e8254f265d322067. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX452277172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d27e5266773ff2deb6ab3a8ddc0f295003cc8673b03dd5a26deebba42eb666. 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/FR59R2323344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dccad212256f58750b69c22761f183d66b7a02d6414dc2c6f986b8e8d05286. 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/DGA082395741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7e0020edd5d1fce879eed5830d214591229913c096fa938f6efe8c2f32c4f. 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/SE6I32483244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3257834908d378b22abc75a8ebc64c35702f041916e1fcdba0ca9163eee7d3f2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SE6HN2435223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cd22de95209793c322f1d721d7aa415640adeb11b30a4f4592d9c0eb80e881. 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/SE6I32445101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e8a05a9ecf1318cfcdbb59c1723f2882abc7c534303303cdd80f25ebb68cc8. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/SE6I32450541.