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 0xeeb1f0097aa2cdd7af662126549961fb33ddd02313369326ee45a26b1f910bdb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3db38910-6d86-4b90-977a-9334bbb2c5e9.json and https://artists.proofprofile.net/proofs/artist/3db38910-6d86-4b90-977a-9334bbb2c5e9.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 0xa1fb199861f218f1d73bbb14857b39bcb4cd95923110ccd0f8dd3bc1decd1d40. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PLF572100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee665dd6ceaa318e4484f417cea29e86967ad228f7113a37276b741548dfdc1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:42Z), 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/PLF572200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c858742595ee8bbb3622c7e275773104a470fcb2bea7fafa4f8d6708a38ef6. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/PLF572200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073f09067e9974c8d26cd8bf953b73fca4b7268a7d2fb377ccb631d464e4b52f. 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/PLF572200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc882542e8191b19721f8c8eacd1c2cdb72924184d8abfc948951ca894a5bbeb5. 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/PLF572200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b04e55470c53a24e5418624a3b38b3f252371b4e777a256e483d1540d91ab3. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/PLF572200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb13896a44c202ae692156bd4002632f03b9cbf081982d3c6d669c837b3e74eb. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/PLF572200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c88437c03f742b2b7a13b283264d0434c4eb531c30ef1c1cd701f5f801f3eb9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/PLF572400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a637cff94a8389e6c62bcd750aa0a4043181fb6fcea6c0cd01eb208cc39a84. 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/PLF572400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2730ee7abd887bcc857237d14d2e00ba852bfe62a1ad1508723f59277a5d6d. 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/PLF572400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e034943c5b6bbfaff33d4f0bc8ef904b5a2aafc291e84815a2c099a3d6485d1. 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/PLF572400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bc0a8742d156ee5f869b1df69cb1c738d4621f967ccd47cc988e0c136b39eb. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:02:47Z), 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/PLF572400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a637cff94a8389e6c62bcd750aa0a4043181fb6fcea6c0cd01eb208cc39a84. 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/PLF572400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b773ec88ba1ba65fe3fd2d2cb2a884453bc51408f1c4d1ef17a916612ab25fa. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/PLF572400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61500fb9fc3770e79dd93df1926bd9c0472df5467fd63e6cae530569e8cd7119. 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/PLR862400849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61500fb9fc3770e79dd93df1926bd9c0472df5467fd63e6cae530569e8cd7119. 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/PLR862400849.