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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684555fdc1166b68687eaf250c8cb36fe3650a966fc34d4fc108c21e4bcace7d. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24d1dc05-744d-42db-baba-b837a22135c7.json and https://artists.proofprofile.net/proofs/artist/24d1dc05-744d-42db-baba-b837a22135c7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf410f398eb6dfa057044c7ff9f32421635549dc72e4a6003b3cf554db9c8aaf2. 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/IL1042303611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d47ad3d3ecc8d446cf0628f8e16f1332c69dd1a856a71b5a12261437f080ca2. 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/IL1042303612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d6aede2a9fe88b397f7a3795dadcfe0ba7af30996dd7790269f3f54764eda8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/IL1042303613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd6e31a356dd1fd2c6b7a291c82dc5d0505ab171c9e0b522ea6f15c18395956. 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/IL1042303614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8892c28df276ea62e7c0cc187a09c6eda238776294777adb700937c4a416ee. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/IL1042303615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1479b7628cf56c63bf49e7d1f3a118d0688e3a036a79e88fa16e10ea840ce69. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/IL1042303616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84afe7c25d74fa13af70f40a5b048d0db4a92d02a79a7342bcfaa1afe2267209. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/IL1042303617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622f704fb7f6d6d0fbf3be0ea46c89bcd1e3cf94e4e758968e2a3bb961696814. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/IL1042303618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc700839737554c2ed16b5019aeee5fa18e7a53cb09ae6e83a1876a6b8c9372ca. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/IL1042303619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3caa56c159a0698557c4ed5951c269fe1995d394524555e633798d37bf528a7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/IL1021207459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c404aee0c5ca7ed5b6ffbb17ea3129f4ab3f57d8fb287ccef44a0a0c86b643b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IL1021207460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1cc86d6f3881c54e977d41280305c64c7a83c6dbe8fd9c633cf6e665b66acb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL1021207484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0800b9711b8917246e27e61c73e21e8110f4f7883226fe1d59fd441bc5945684. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/IL1021207485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f50eab27c40037b0c2b501d4c748dd5c82fae967cabde5e22f17f1ee22a833. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/IL1021207487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccfce2979d22694a94ef1fbd7b059f4073c84542e8b2850ba86c415563574e7. 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/IL1021207490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20df56d9f05e6eb6e3acca47068381810250aaf4c2e62436cd54d128d19e956. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/IL1021207492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db8721997ec41937b38c2604cd496e901ea9d28c40ea49252e1996100dd60f7. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/IL1021207494.
עבודה עברית - מחווה ל-50 שנות יצירה מקורית
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4039ba72cf859ea4ebf2b7d48dcf68630bef9651368bba4cca72b3a9618d8f. 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/IL1049801158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096f5348a06e0aefba0d3bc064d794711c1831e37ad4c00dc7b3c971e90c71b1. 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/IL1010002544.