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 0xc7edfa75c8b25c5a806258cf15e7b9aeab68cd5cbfb0b91b3c9542ac4b53071c. 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/ac617821-ed8f-4fee-bf5f-2326bd8ca78f.json and https://artists.proofprofile.net/proofs/artist/ac617821-ed8f-4fee-bf5f-2326bd8ca78f.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 0xf37324d954fe147f6f073bbeec15d4d215d445d58889dc69e05427c32dde9bd1. 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/SE6QE2200264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b81d83c351ee1508d30e2f6998f9cef5c60c57f385ce5a44cc09c5b4f3b02a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SE6XW2200909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec3cec5a30d1741eb1306f2d6808bc90b7ebb61ef8727647f3326896b114345. 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/SE5752327144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219cc79d38d446578500ebb9388eb3322788d85bbae77bbc83d863c5c5f09e51. 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/SE5752327325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c559c57af726dda365cc6f7ee43913171abbe75433ed83c95b0d971ab9cd9e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5752327329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468ba2ebd1171ba655112c7764e6b15fa633154e1e967320347999a447e9ee56. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE5752327361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde14a7ca7e643e36824b7b3a59bb771457749511f117eeb9034f1ff286678e98. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5752327365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1edd8567ac72b61ff6f51a82836e4e11e2d9fae7fcbaf5e07a9c9bf63055405. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:15:36Z), 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/SE5752327380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082f8db62be3ca0883c76c0d180db3869977d6fbc551c17bb9be24ba22f4ede3. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:12:10Z), 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/SE5752327385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc07d8b45a23e31647929f93353f722586b1a3181bbc382fe63bcb79d36f8d2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/SE5752327389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0919730f6e13b30c63cd612a476b993600cbdf798faa0514700e88ae45ce618a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5752327393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a28316f7a76bae44285179a53d87a10f73cbe409b7b88c43dc45cdf428726e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:06:11Z), 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/USL4Q2401709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37372552ecec363a51c998d6d6880bcde307530c37615c1c86c1ae6c0774020a. 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/SE5BU2449971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8834a4e638e3e5dfdbfbefc03c9f339a01e1ae0d8e3b7e19278c00f5c330eef6. 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/SE6I32477281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11b6af191d53dd4132e52bc5364c843ea5b7d11ec17e8cfc6a43125346873ef. 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/SE5BU2530954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30d8db99132cdd98f89c3666b2444f8a11948396c48d4e5dd5e7a05bdbd218f. 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/SE6SA2430563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2411f5f3f6e13dd4456ef965b588598eba5245d1181b0d2a3d0d6407914fac9f. 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/QZZ7W2471672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea3baaaacf7ada6a2aba91513726eff65eea43cfb9f432b58e2d29dff8f9f1d. 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/SE5752392410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf06085f30010d81f2cb615adeed4274b24f3786ce7761b3eae74a3ae1eab1. 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/SE5752392412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604be0eb2379040f643e01136370176a83ea65868eb637a0424c7aa7e2192824. 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/SE5752392416.
it was only temporary - echoes of the fading lament
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf532fd93c6bbaa01e23204c1afda128d01e9a6ab1b11fc49bf2c3a1df5716ad. 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/SE6SA2438680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfb0664ff4f669038998d239b94043e5a0a8e840e2b18f5980cff6ca0722e9d. 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/SE6I32490582.