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 0xc99875d393c10aea5dbc392553e865b428ef9ba4f6154880b20c18429bebb48b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b2c90c9-360b-48c5-92d4-9d7cfde6b5e9.json and https://artists.proofprofile.net/proofs/artist/2b2c90c9-360b-48c5-92d4-9d7cfde6b5e9.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 0x6043b5b79b393937317afdf8c2c3987fcad432560f6f52f5e87eb54bd6b79370. 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/BRTVW2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad76e17d0ed944c079d6a6f33c46009720932ca58e30d0b70c8a9bd18cfc33b. 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/BRTVW2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808ecbb865f76c6bbcf97ac9c0f3df364f793ca6999d27705213022463fb0014. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRTVW2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e9f372fa27acf8948429f07e6c53c997fd6af61af9ae58e0b045f066251f9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRTVW2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1ecac6d2147c39246aafb6250c4a75ea4758682c292b91ccb2fea36a86021f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRTVW2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c6fc4a31a66eb9c6a69d86634356880ccd5b5e177d84fa753169f85c911230. 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/BRTVW2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82736451eb33ca4302e7d8a1bdfe93026b1807804468e9eb12a7b9b3efb6af6. 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/BRTVW2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f04e5fc6cbcbb3629deec150ae49e7adec41abf7715e6de76fbdd9ce2286171. 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/BRTVW2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac636f1851fb0d1ec7d087e7d1dcd864037f4c23e50034380cea4aad36f761cb. 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/BCESS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa302e92ea7433ec1311eceef4f8c3278ce6a81ef241b0ee83988e4521634ef7d. 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/BCESS2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad6d4f5b378a0297b7ce5e5f1419d716dc19746ce6705180a8adb3f0590e619. 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/BCESS2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58577486062aea00addd1dd6ad6e3752d115e3b4e28c3a42640a281593d862fd. 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/BCESS2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cd41d93b1fd70e6093e56899b6473e25218b12a63cfeea212cbaabe2cd93f2. 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/BCESS2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14fa6907f2062b0f06a9738d637b6fb56f77dde5be14af656be75b4a0762e20. 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/BCESS2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02aa52f86c5e815d1adeadd5c663d26f706def4257dd63ed34b2767d7f0d54bd. 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/BCESS2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8027e3517386e5acae1c2e9b42e6ea0fc49dc9367da53ae6efb71487fe1584ca. 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/BCESS2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6259cdd70806b0c99448fd040bbfe1040b222c622a550015576da99ecc5a0238. 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/BCESS2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a13c0e36974dba4aed0cba30974d51fdd5d44607bac6d458be83c08ac2e606. 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/BCESS2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7dcea3b74c1d37e92356eb942fd3ad1b48fe24f46ad5b5039d7adbb6c75e242. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BCESS2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3679262c2575f243aa7b606e009b4a0e3b8ec8276f617673108e2059cc2a0f74. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCESS2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413c05ef5fa590c72479216da3911369f005f233fa80d9cebafdd02d9648b719. 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/BCESS2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3679262c2575f243aa7b606e009b4a0e3b8ec8276f617673108e2059cc2a0f74. 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/BCESS2300001.