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 0x03aa286f41193283ba93bd72cbda8c64d150b01e1eb42059c17f06fef4196a39. 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/5187b687-02a3-4710-82f4-62c72bd945ac.json and https://artists.proofprofile.net/proofs/artist/5187b687-02a3-4710-82f4-62c72bd945ac.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 0xde1c204d78344b0da7a37dfa891b9b0a789232c0df505ed66d106de3b8929e63. 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/SEYOK1408112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b5310cae7505f57f80eba27ca4e6f031be285e4ce2103cc4b094485afb930e. 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/SE4I41400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb084b7e5ee4ffe7ebb588c6cbced75bfba775afb220ea2f2b53af7752689f8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE4141500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1b04be0b817d49e51505ee3515a82f748a0f429c5eea7838f12185ca7c28fb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE4I41500161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514ff4f467470bbf0fc1bab27259658850e29a53080629a6882dae6d22cb8ffa. 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/SE4I41500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a651cf644bd024a5a6e4e18881c28ca0a84a3d426d31b8fae7663aa72769117. 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/SEVQU1708401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aae9aba829f8bae56edfdeaa23897a40c72a4acf78de610936c36f9e15d9b6d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SEYOK1851368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5387a84abe55f4a524886d62acc5983d86337be762e83ff5a70c89373a11b13. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:36:20Z), 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/QZFH21900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac98c32124dfc76181ba2dc7ea2ca1281e6946d6b0e9020e8e5f49a408922e87. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZFH21900151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ada61d8e3bca6d8199a8405d6b77a5b7367f9df9f0fe2327781775833c1c81b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:27:56Z), 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/QZFH21900176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b55180f29e261faa991665fc2c2e21396dd47a0cac149d621b5350f3cebff6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE5752488207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248db02db400b0b1f7da83968c6b85b1addb48615cd93afbeafdf319dc367b25. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SE5BU2557281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6b4d02b5769f52bb070affb9e128e17db7687231fbb57755b1e8e9e7697949. 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/SE6XY2593396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152a2563cd0520d047f26b989027d56c5d74671cb5c565ca13c801d04c16f120. 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/SEYOK2124711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0308802544c9f3d82af6b8d125a7c341318e8d7bb18d55ce59d70f7b2b398062. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAFX2157285.
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 0x2e17dea50e20534927d77ed344f64827cf9d924b3449fe9f6d0d5a3b8b303426. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZFH21900110.