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 0xd7632f786a0d44d743de9393998e766098e6f3a2eb62258fd3efeef9760ca883. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcf58e3a-f06d-467a-9cf3-55ac8741a6c8.json and https://artists.proofprofile.net/proofs/artist/dcf58e3a-f06d-467a-9cf3-55ac8741a6c8.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 0x686b1813495fe4695d19e5f23bb9e7bfc5e18afb83efd939cf68a177f7a32625. 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/USHTV0710076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdcc9090a0b49a4ac19ff79b42e12d4d04557b4125bf8d4d3e5dff675c29f62. 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/USHTV0710077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d168f4fb0d2fabedcf5c75314d06f295d2329bc9a78f07a874b458caeefe450. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHTV0710078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2ecd0d966d92c0fc7ab5bda54d1d65261fdaaa41263c2b20d7b48aa12236ae. 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/USHTV0710081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3f5a1aa299a1a1e093f8addc30fcc10903172466f459da61f9d675d6bcdd9f. 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/USHTV0710082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39377efac6f9c056ca7d1709ab5fbcaf3116ea6477aef5cda051bcd84a0dbddc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHTV0710086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c18748ae628433755eb675e274b903ca0e506cf9a50b72d97ec2ae623f88ea. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHTV0710079.
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 0x06aebc1a97762739318c1ea42b54e94cad81516209f9a2a872abe8e3c3b455d8. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USHTV0710080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea82a099171e12d8201ae98223fa17677ce9d340d747644a3cd9a389513b49d0. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USHTV0710083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c6af88bd38679af001596ac79ad3e88c178a6073984278b12faedafef473d. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USHTV0710084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45faa20bc9dd603b3e4f4ce8f7341e3310065028db16d3fb395da21104c96ac7. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USHTV0710085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea59d3e98931654ae2a389502186c62e32119c04b76ca29f619d7c568936f74. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZS7J2318425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a6826c871e18c4485cfb1ea5b5dbb78fa1485fd394148cfbc90c9ac3da8141. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZS7J2308187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb330d9ca8c772d388f60e45b646a58e5fbb326b593e7f5070e685fc19a4e64d1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZS7J2354899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554b71583865ebd6052a2d776a431cb7fd4d311b89ca7c6a2fb6b5335a82edc7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZS7J2343635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dc582777c71f287e3834165ad93de263d64cfab76117034528271b16dd03e5. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZS7J2344298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a6366a802069bea5895c6de0beba6c338d256e8b98bbea5a23c9a21d8571c3. 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/USTC10790664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d700fb298aacfb69e12da68a5163add850ae2b85aaf97c1e79ecf58da8352f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:22:58Z), 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/USTC10790895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff90ab635f366e1c70691125013d02e3ae42390f0660b8c72588341d8bb9d3b5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USTC10790663.