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 0x4e1fae14513ae89b530c7ac95086c424257c6cd7c9413f53179e64f60c0e039b. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e8f1d5e-4db2-4d05-b7c0-a611b234d88a.json and https://artists.proofprofile.net/proofs/artist/3e8f1d5e-4db2-4d05-b7c0-a611b234d88a.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 0xa4e718988eb0d07986ca51273f95a26895b22fffec805caccd4dfaa4294b7138. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:23:17Z), 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/GBSMU5882296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48682e02686b85c1d7475b050b9e3b2849400cfd3707b0ef5a94cf05dc371ce3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:53Z), 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/GBSMU5882329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b03373f0d2dbad0ee5ca64274a062e98c77b22c553da580f65fb57c9ca704cd. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/GBSMU5882331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e05a7c13e8c44a82419534fa3ac1233df1c0d1b57ce1a245f9689aa0efe5e4. 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/GBSMU5882332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d5ee4eae80ab34dd6d9e78a386be4a89ebc21b478681b4406a89e33d1f6a4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AEA0D2051970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d6a33f4e7190b588dce0eebdadf7ec19f5d674e0a037c03e3efab8b8b1d254. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AEA0D2051972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a60a12e61f57868c523de3563d5cb7e003df0521e32a7991ed4a9cedd0002. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/AEA0D2051973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241e09c2bdfa84958fb5815b1909d02797e0d0c706c88deb0826210d787cd795. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA0D2051981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c54db60b67df905333b52e05705e4adf9114330a1c786e552311505c068654. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:36Z), 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/QZTAX2435771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e865abb3aa2297a40ba381ac511252746522ee492fb772546507551d6e9b345. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:46Z), 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/QZTAX2435773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6889624819b9a41f9a0c3c314eead0408e19466428cc8cf695d63307c648da. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:21Z), 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/QZTAX2435774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592cbfc8e080bd1ab8c007545a0fb1112424a6fb169fac038ffaccc860c6a436. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTAX2435775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ade0ad4fc67a1922d85f547c80d8f8ab21af8fe8e8db123fce3c2d1634940e0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTAX2435776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82388c55b5396bccc610f08250baded49c7a6c880ab5fa2d7fedf6582a0a1ee3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAX2435777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbac4adc8b551a0f6b93e306fa9922f2d3b830fec5ce1462f579785138168ae5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAX2435778.