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 0xe6b3c863033673a26229bffead801ab82c81ea4db65a1b07f7d98b7856eeafaf. 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/e46d2157-356a-42db-9ac0-bbccaac55787.json and https://artists.proofprofile.net/proofs/artist/e46d2157-356a-42db-9ac0-bbccaac55787.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 0x5708b40d55a5ec21c05d40645db72afe0d5a3b795eb82ad9d898d2f1654f90ea. 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/QZFZ72119197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff370c05ef217d0c739bb85bb14e362f4bf8cf4ac40bc96284fb8d49a07386ae. 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/QZFZ72119198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9f9f8def18203d6197c80a795b4be31c7c4567a952483a30d493e77571adb6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ72119199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf804c9dd8493fffb059e03011f3ab2aefa36e17238484cfd4630d57b60c9603. 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/QZFZ72119200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c23f293df4f09ed63d778de9e9c8e736461fce9fa6df0e5ca47ba12307e805. 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/QZFZ62128803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8d36d32daece470058c7ae72b705cdc31128a62ee04411206e3a8a51e560f0. 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/QZNWU2064633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac03ffaf1b721c0ca1342147e01ae631c704851a319c79f910694b4cb5d77c7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ72119201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec62a614d13531d78e361d50f5b6ec4844c787fbc1ac266d0ccceeda9cd8cc9. 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/QZFYY2440413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f90a70545419644e25f8474d5f9554322055379c3a4eff977caa3e935dd29da. 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/QZTAZ2359232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c23f293df4f09ed63d778de9e9c8e736461fce9fa6df0e5ca47ba12307e805. 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/QZFZ62128803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8d36d32daece470058c7ae72b705cdc31128a62ee04411206e3a8a51e560f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWU2064633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3738c98d6209b151203d4a819d13ece6967f025c2f742ca0978cb01f30fc03. 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/QZ8LD1929552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7af803fdd53c1092a2d161df31c7cc602cf2ac00e1a4c7fb6f80a299c4890d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ8LD1929553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2495907463cfe8af625ac9610ce95765cb3588e77dc355d5bbc73f9e586f82f1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZ8LD1929554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e104b2a62e730d251b97fc9ac26c90e37c804b4ba6be019a30159cd359ca4af. 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/QZ8LD1929555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0427f35bf09b17545c07b504c05831d91380172c3a322ab3b0a33f8794017e. 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/QZ8LD1929556.