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 0xd102ee38840a7f98bc4a5c030f879d04b889ab3f41f9d72d54acf0d60c3745f5. 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/beba4b66-bcf2-47e3-91b6-f09a48dbd098.json and https://artists.proofprofile.net/proofs/artist/beba4b66-bcf2-47e3-91b6-f09a48dbd098.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 0x1d4bf6b1d0b6786165abc7d9172d723dfc9e0030dfd64282c281a9be12d6f6f9. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZS662183458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69fb24a0b1a6c3cc5c6d072e913269cf49f5f936166d8609bd2bc834d7684c7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:23Z), 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/QZS672137981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7f43541d5f6b75936de335baf0c37f359bc2fd2127f6c035caefe2c0f600fb. 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/QZS642138351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ae161a6dac080e118f27d52e0a2cd503941f6700c5500dddf18812725c82c5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZS672147446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0b1c30bd9a0e6476984cc7694f7293746162ca666e774d2170486edddef2e1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZS652111163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e344bf80669aa0d747a8b013f008d4e9610c407a27fc165b6d243a5601a1b11. 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/QM6MZ2222980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ba3e75528b81b591616e5e51f4ec7135e9cd80efaa58cce8cfef4ff6cbb18d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMFME2343315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ad5305164733967198c8681954445a4956f1dcc09c852c3df261e4c407d49e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZS652423106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3913daa9efc3a01676d54c411ee8dce64c56d140dfdb1789285c3c743b6fa5c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMDA62525301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fb34fba47e03fd46467b3d44a0201f0c20319b4444dd1f11b7034d72fb3ac1. 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/FR2X42394635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec49019997577a572e5eaba310643cb460b58a56f8474aa2760d94b9b16daa4c. 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/CA5KR2379017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df753940bbab5edfb6986d9c06a7a45c48a423e03481c2fa3085ee7f0ed6819. 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/CA5KR2379018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9b2db2ed05ebd1ffc12d9eda426fb0b2cb9dbb588a4bc7636ceebf34dbf50c. 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/CA5KR2379019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a35ff77d934d1a5c0f3df06a03e344a2992e100394fb55e56859523e7de53. 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/UKEX32209919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34089a528d8586ff78411fd90f228f32bfd7fe177f95c3cabab0cdc92edea547. 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/FRX202244024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34089a528d8586ff78411fd90f228f32bfd7fe177f95c3cabab0cdc92edea547. 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/FRX202244024.