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 0xe4bc926e93463dc016a33e9f226ccff513833c462e1aef8de2d35ccfd3bb3fd3. 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/c69e26ea-9f23-4823-b8cd-ec33dd14b7da.json and https://artists.proofprofile.net/proofs/artist/c69e26ea-9f23-4823-b8cd-ec33dd14b7da.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 0x01d3e6f9128155c3958f95013df672a87c3322954c1549825347b31ec06c2640. 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/QZK6M2131093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac60649ece10f6f3d38daecb8e550c59feedc7e08c53c107af158b4bf40ef9d. 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/QZK6M2131094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89a21688919c72becb89b174221aa176b4aa3d552864bf753d3ddafd149c749. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2131095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921cbcdfa95e938217f7264a9dcbdb6ae7f73ab25c1e7c8fa57621b0e358bf86. 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/QZK6M2133035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57c5528f5dcc41225d39b59b85c7806226d130bdefc69bcea6b38d7e04d4d9b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6M2131097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1e6880dd901d93c9a7c94210755af190adb967308c880219eef086ef19fc72. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6M2131099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e540fc1cb74947b97592b2a4167db30d01330d0811bfe0c63cf5c4e9618885. 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/QZK6M2131100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7d0fe1312f6ed5946dd6bdb8b5e85612300d4de832caf083dfec1a3127a3ef. 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/QZES82182109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad0fa6d7f0b6c2361a75253d3dbd2978109afdb223c1f76dab62b153c25f3b4. 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/QZES82120042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ae8a12cd85fed4403d92315f98dbf70b8d0d131c8327fc5ac1ffabacf7d877. 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/GBMA22311367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe48218fa9d47dd67cc17c2bc14d4a2d527d13cc3721cb4a68a7765435e6c28. 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/QZNMY2311209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb5623fc4fe1d2b27c43709d79c3cc9ea67638cb77afb0db0861c0cf3afd003. 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/QZNMY2311210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c367e7b5695fc26079e344c9b9e1f7257ce6608458e8c6ac3d0448cb58f1a4a. 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/QZNMY2311211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36d78ae26c8ed9fceaa3e8451b24123c78329ccc358607854816c83e297ac7e. 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/QZMEP2246779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7ec14cfbabb25c2193df1c5c6a8f2fe5758dfd65dd5a484215796d583bd808. 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/QZES72227668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8a3e42cf4931642aab5977a71791fd9e3765be625263cb878bdd9dd08057d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZJG52291008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe867adeb24bf326212d6ecf002e1ee598a642ac3ae6328c142e50d0829fca2a9. 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/QZNMY2104746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f833eae9bc30f69a7a11bd418f7627c1e733ae6cf6548e0be6e72520e0c2d94. 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/QZJG52121441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697bebcf877d0d09d4ef587586e174c6d104ad84fd9c47e10792bd2fe9090472. 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/QZDA52347613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc717ea00ff34e6622c603b6c20680f034b1435c20ae9e4ce3ffcfbfb3c319f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN82156838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe401c7953b1ff4d9a7aa3355da481b4a82b922c990b8f99b7aae50e6e2d7a946. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNMY2129993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b051851d83b2df8f17154f567d8771ae36ea5da9e4e37f6a9051d8376123ac. 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/QZNMY2456534.