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 0x180c7e10a47900c608517707a2c709b386f8c73ca27450ac06011418db56188c. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb54e932-77ca-4107-aa1e-c5ad695041bb.json and https://artists.proofprofile.net/proofs/artist/cb54e932-77ca-4107-aa1e-c5ad695041bb.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 0x7358e0fa94da4714bf1729b9075ddb3acd9a2255d53d56532031500558ba9a7c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKG731713498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61ad3cd3ec75bda6f80a4ab47c7b40e04c35e2043a31df7e105858929d53470. 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/HKG731713525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaede56df9ace3fbd9d74503a8bff92e2da4a2fdc959fdd684b0c3102e0e2ce. 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/HKG731713526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fe72df3898faaaf824a6b66cbf975d66e60cabdef9ce489ad845da613b57c1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TWAN78800173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e230155ea9ff8132e3e4e6b92eda616134090bb054ce6ea622c702425518e1a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWAN78800168.
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 0xaff490700449eb5eab3e562d641271f24a5b0875bb5ea371f7cf3d025e83da1b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWAN78800169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22895b8e4e73869b070a388abf3ccb50a01c52724b490300c33610439e19a89b. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/TWAN78800170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab2f8f6b788e6528259963c8b972d57443e8fd4497656e8130a8eca14988474. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/TWAN78800171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdc6b49af5fa51bbc34f90bd125f560abb0dab95907b1a6f3a10312d7fe70ba. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TWAN78800172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4448a0c17579d998450e733fa11e936bcf640e59ffdf38e9e7916c7f75e95272. 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/HKG731713528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e6b55860a8ccb7f3a5568eff7e28a76e3819877cfd872555fd9ec001958f59. 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/TWAN78800175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337bd74130f19f2b20aa569995539156117162c84d7de9a2ae355f842c0aa15d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TWAN78800177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4337b81c9db3e4a0c75cedb510611d5c9a4aae0c6470a4dad0cb0aa2813fd67. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWAN78800178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bce725b8eba7e4aff86fc958ac861c2cc42c9b1b3ec94b5d9831ff54f03d4bb. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TWAN78800174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9310990ea9ef831158ae2df32c8f532adf592bd53de7a468cc86aae59444101c. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TWAN78800176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00ca779ae4e8fa791595dc720b5c358f557d53507dffe3dfaece9dda4bf6c3a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZV2N2220156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21cb763f3b3c413ddb3d86623d954657e37bbc403e957df4cb01f39813d9cc6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZV2N2220160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5579dc80118b08de25996046dcd984cf9232cb3bee80f5aa1656528dba0f0b40. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZV2N2220159.