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 0xed743ce2808ed8e812b465d7bc0d37948da4d27aebaa6878b35db93463af7f4d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51d57fa7-8f66-4d60-afff-22cf2c2f4126.json and https://artists.proofprofile.net/proofs/artist/51d57fa7-8f66-4d60-afff-22cf2c2f4126.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 0xdb68ae26f1b616e319e57547358cdbfdb764792bc0106590c1377ed75c34e86f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRTRB2200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5c42a17ff6157077cc5e2168d87a4875e14866564a99a1ca1e53ab6c980ecb. 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/BRTRB2200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d0690fa8805668bfe4331cb3a85bba5df2621ec103698a6886a77368a055ea. 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/BX15S2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d6935e52a130a2b2751d9164dc7a34f44b0f515b000cf178c3987378e0b09b. 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/BX15S2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c31c566664370739da4932e274232cff3063ec18c96cbcfafee0e856727b42. 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/BX15S2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2497dabed2f63bcf417d2b37832d4f0daa9a9ee5ac2de9120bba4206767494b7. 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/BX15S2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7964c7ba89acb7f51c7a42f5627cc2687745beca6763eee31ac5d42da899630d. 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/BX15S2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e05585d229d7d6e15435fff4e782ed3fcf2be50a3aaeeee442cce77bfde783. 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/BX15S2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29014411a5e63303f26cef53572e747e32b7bad41e71ccf97b49ecdfb3a5c1bc. 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/BX15S2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eb437f78822da4705322865ef56a5a85ddd258ee87de4aefb0e551516b5050. 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/BX15S2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bb108760ae5641f177fa2974b2b4de7769244ed2c17ae3dda487d33adc9969. 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/BX15S2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925ca22dcb3177c5ebc4c7756dd70a8a3d51d0ac3869d8f64b6da6844903bf3. 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/BCCZC2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7117ec2cd7e233c7335a07feed9fb75010cb65f19686898f356641efcf1c2693. 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/BCCZC2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0078afe14596641819fcfd471bd73d6756712c4305910c037920a3e01290a41b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BCCZC2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf73fff7058527ce347c8519613d7189761a070e68e6429c6144e2d9f6cf5794. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCCZC2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57953ba158fbbfe81b33c9ed1d91790f97153a30747e724db3fac03ca930c1e7. 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/BCCZC2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd215820fec87e2df9c80dab586498555815b72ab36d22b520dd787cc4ea3aa7c. 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/BCCZC2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a6d53ff5cbba1b6a5ffaa76b5555584a030b14ef6b047a4de85ca272ee0e15. 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/BCCZC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddf81a4adf773c870f14c24f8da7b09e81d71ad962b9020595f50274e9f9222. 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/BCCZC2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925ca22dcb3177c5ebc4c7756dd70a8a3d51d0ac3869d8f64b6da6844903bf3. 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/BCCZC2400001.