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 0x0fc1a7381c644d42645b3bd4dd3fd3498bf9d042d2abb8721605fc4276377e69. 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/371756d2-4059-400b-ac37-3feb54218ecf.json and https://artists.proofprofile.net/proofs/artist/371756d2-4059-400b-ac37-3feb54218ecf.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 0x8632ad72adee2d51fa128bb7e255afe02238c06bde25206117a9c82205fd4673. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc7416813b433f55b9016a2ff0c568797040bbc2cdc943d044c1e37e029d84b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL4YD2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e20cae16e0043f293bc7df7eda9bfbb3a945ab0c628dd1bfc8ce92a29082f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c05aae6be0fdc84524120e29fcc2ec8844165f0fab54563b04601e5b19b2db8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL4YD2200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423b6b15072bbfcd767f203028e778dd085c7c777a8aec1773f4ac9cc9e055ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0614557543671157f30768a1fe5c7fbcafae4aec7e6bd63bb4c4edc2003bd627. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac24f5e522f9714bd03f0472ec5e1ad2afd55bccaa780fb4401e8ff40c1b40b2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL4YD2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbeca35500c12d26b4efd1d517bffcf2409af804427f28b6c15ed27044a3bf91. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL4YD2200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4733e2364bf7e9961088c8ca1f4959944949a78d2afdad4f8bb3ba15f4248e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL4YD2200139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647333cc403e17b1c59ed6ea4fa2b8a2f7f204a345fb09e6b9bdb9a63d94b16b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bec43b61225e01c3e1f4424fc606d5ccbf072391b9d47104ded8f68170be301. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685eb5cda57f31a40fb1adba916956ad051c0540308cc29bb7afe75abbdd4215. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025b41cbd88d6ad6a4834184c8dd574e7e16236a4e9a344e57e2b5f2107f6ec. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL4YD2200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2b65a493b955f206f85aeab2587bb1d8ab0e6344509903cc758732c413d2cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NL4YD2200124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b5295229fe3cd7eccd7a17d01e7116f6877af944018e083d5eaa43ef20459f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac893fc6372b9103273e29959691f46fd1a26622239f1891fd2149939c8b175f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US3DF2454136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb562c42534f7976f716b774a272031f5cda718a56ea287fcf00ee8322745fd0a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USANG2221897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c33e5a5b58a4f49bd704560b585c6356c4449b8c3991304cb275667c49a3ec. 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/USANG2223288.