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 0x29529dea08bccb5552fc02db8bcc46e07246e9c5ffbafd844ee202cac0262ced. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bded37c6-f305-458e-a09a-18b512a98ed7.json and https://artists.proofprofile.net/proofs/artist/bded37c6-f305-458e-a09a-18b512a98ed7.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 0x463cbee1f1447f76c2112a9f8e815ec4d2a03c2acc3f803727caf8da2b4d20d7. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BCZ3U2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d64db8be501b42c5de34ea4ee853d9ae0f28b9a442a96c5f8f55bde6c42ec4. 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/BCZ3U2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd987bdbdb4d7256483e452eceb1cadf769876a28e9bbcef3197623729becb4e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/BCZ3U2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5707ca9e01562ceed3bfd4bc88cad82aaa8658048268bbaedf34d7edd48b7c16. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/BCZ3U2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6bd6b8319b5f2ae50854339c55244c63eac7cd2aa15878a907015ee2719798. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BCZ3U2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd598cc4d440d0506892241c5910c1f8c2999fffa37b3d53e68229c8fef2c52f6. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/BCZ3U2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a80757daf7a3fdf30319ca5b95bae0553a02de53dc115c84f3c66a3ba3067d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BCZ3U2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88c590ba8a3efa7fd44b727f7862f5bc4a0bbe1798b6f24d65872fbb8b49885. 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/BC1HA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3b860fbf3776c38cc2578bf0e292bb7ccb136b0f94c4468bd0af8edd053166. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-21T22:39:47Z), 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/BCZ3U2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61567259ba6f0823a5b7343d697ff48b9d84d5b14ea955d9c6eff6d6c4b72046. 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/BX9KK2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7e3ef2ad6a04379fbf8b3628e063bd83b78cda94e25a7cffa527199a9b8e23. 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/BCZ3U2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c5267bb1ac7670d9b6c4b4273902ef6848ec2ebc108f47086fde8796756f36. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/BRKJL2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f99f1bdf2963f881637c5f8143ff7bea1b4ec340dd332055e81630ff06ac70. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRKJL2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f5da14b93600a419bfd3aee0ff17defa6b0aecddf70eed1c3bb6fbee764a6c. 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/BRKJL2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9883c7d7605fd7637d1c19addfb9f7baf823efece257bc38b31597f179488a01. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRKJL2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4013f8da09f83f01df738ba3f2ad5de971a502bc28e0dc83c219b201e9eb18c0. 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/BRKJL2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00b99b708afb37b9d1e2cc35b897500551f4a0c22bd3c61fd5304b3f18049cf. 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/BRKJL2300010.