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 0xaa732c0b1542c666c0843984dc91e0482ec1bed9f963c797c9132da6136418f4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2d5e6e8a-6849-4e99-9b01-0f452aed0050.json and https://artists.proofprofile.net/proofs/artist/2d5e6e8a-6849-4e99-9b01-0f452aed0050.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 0xb319abead1ce0cc3535fc5e796118950b566fe52c41c8e37b2c702e90553406c. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/ES7311800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542178bd28aa089c99cc30788044d1cfaaabe4a7157687019e8daad208a11666. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ES7311800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910d42b0c2987cf0c6a5fa3bed7a41560bef83f8e730d72971f084fe4466118c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ES7311800043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed7b5b8b100691e8ad4390c60803bc26634792fee46da72f02442e4c725a66b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:05:09Z), 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/ES7311800045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cc16c2a78907428f3992ed86090699941e24299b892dfa3b092688270d1aad. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:18Z), 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/ES7311900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a430361dfedb307ab4c1e38190e896f39c994e77103a914f69c451694ce8f64. 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/ES7311900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f733294cadccc797028fd012c6f4fbe82e4a2b53698aec37de2ba9269052894. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:54:58Z), 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/ES7312000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2366bab7097263f3c0c585481bf8e1649cf67d227d6511c09d09e2bb45765e6a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/ES6102124704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc54726ae1a09167b060ded7a72933baed803e7e75d9ce93c70ee7abff8567ea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES6102124708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f82711057a1e5ff045fd0a5dda6c0f43cc84eaa56dbea5cb4df21de770c5376. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:40:59Z), 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/ES6102124712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a2b9cdded926e821f70b3a1a30101f17adb7ae8e56f79b9da968b8a7a871e7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ES71G2420521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b7c66eadba1c5ea6111f4260156ad2a87dbe73740a195bf925d5b966781eec. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ES71G2404954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb440c78eb27b2fb3132f5d546a329bc117ad453539803710b942a72f19c3dc3. 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/ES71G2405475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb582f5adcea61e284b20f913fd7947a2bd0afb96f2b6f20b59e4419d756d6f. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/ES71G2502924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7938c088bcd335da75b4b670955c49563dceb9dacfd2166dc858f8a62fc80b97. 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/ES11D2100515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf5f0cd36ab84ebc2db83fe56c1d3b497269eab027469903641d45d0fbba143. 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/USA2P2440364.