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 0xb6db9d10f4d55a3effa2bd3740121ffe669f66d4bcf899df5987c54462236c38. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/996f4134-82f5-46e0-a5dc-519866086d85.json and https://artists.proofprofile.net/proofs/artist/996f4134-82f5-46e0-a5dc-519866086d85.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 0x93421f86f90b4a6e35518a14192e93c2c2f6592b825deee5b70c315f6e0e65f5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:32Z), 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/COCM11500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83288d1823ee604b9cb3bc57b401bdd503bd7de07f68373620658e0adf877ad3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:16Z), 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/COCM11500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54e53f8361b33d64d70dca1d0a454886a79094433ac904ebe00964a9ea4bcac. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/COCM11500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8b7b5f1f37c939827e327ae328a40a86392818dceab3df2f1dda7989f31096. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:52:41Z), 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/COCM11500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7b7209309db010a5bb68806f511210469c6204385aab2a8b723db182dad116. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:49:42Z), 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/TCAFI2193713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc84ebb99466685ee3ed5dc470ecee5a638ec8bc0cb73f6142e3aa6b2ba2ca3. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAFI2193717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6713adda4437cdfb3fa73c56ffef03a79178639451583cf115f722fadf82c5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCAFI2193737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c9e737f5c5f3d572735543fdb6acf7b382f95329acd3051e8dc5797e09bec2. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:43Z), 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/TCAFI2193739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734adf7151dbc964a31027fae985c7954012d71d335e4befa13ef6df1dd307d6. 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/TCAFI2193742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff5cf0e81e23f8d4912a6ff9052ae8d1f7ea9334d7979c09ac0985106ca213c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAFI2193751.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a9974bcc47f94f851593b469b56848e51e1afe4664324b1f554e14a25f89d9. 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/QM4TX2248111.