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 0xca7817c5b1d27015950b251dc575f8b984ca30760940f04ad81ae70f2f909098. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b095b5b9-cc1c-4113-8e2e-69e291244d61.json and https://artists.proofprofile.net/proofs/artist/b095b5b9-cc1c-4113-8e2e-69e291244d61.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 0xe3fadc4c167dce222dfc692072e3d779c68dd0987a9404705e8b96b5d817963c. 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/DEZC62203083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62befb19dd2f931b3c21c7fede84c95a49f0814ed63d23d40cfd4020573bf36c. 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/DEZC62203084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a0af2b66a7034c43f6631666f0609c2ee51343c2d4463f6d081a37562f2903. 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/DEZZ52170227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd31a52e14bfa266ab88d8481038944268e05bc3cca5b6c57c5a8ce5211a52f6. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/DEZZ52170224.
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 0xe1fbc9d4fb5795c637fb074f2dbc3bcf0ac2a2332184ae34f7bbe5de8cd6fc0f. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DEZZ52170225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066e52509fce1fa21643e77cd43ef8678569149edad8acc320121ac4a5788335. 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/DELJ81763938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce2570438ffb8e44cde277967da50a431bfd23c6226b6ae7ddccbee136b353a. 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/DELJ81763942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8dd6378f622b80c5a5a2608d31a9b60d049d3eab94ba4b4f7e609144e8c5fa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DELJ81763937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d738c5809807f30a1c37e11c689894341dac91a2bef40e289c463690a2ac77. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/DELJ81763941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cc27adf195eeab38dc2d564b1f8215c6acebd6f92d2e8bebb98c351e779bc2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DELJ81763943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0891aa3eccdcfb32876351fd1c4e97251649e347dbd2707fe4e067165d9b4bb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DELJ81763947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694d3ca706dc1f3ac39f46875dd6e63003d23e2443f4416931dc9a7c63cedca1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUG91700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe099733f9659dbd25b292618d87f545196ae885cace5b8321399f6ab70a8821. 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/DEUG91700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8bf6a788848ccce3bb6bf6f90857d877f64d59e79afdcd7d62c2f4ff7bff0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEUG91700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfcf72a0205847d693e4f06ad7bf1ee6bb8e37d04a240d76d41262c27ab677e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEUG91700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23154f6b6a0aa156e1b285620642200d648900a9b7687ea57aeacf8a650abb5f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEUG91700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad528f68cdaea6e22c925fed8f8dc54bf29ac4c20bf9d5d0299d3e9cc6cc499. 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/DEUG91700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47386733f7bfee3efdcf3f8e6f8644ab1f8377b09121866c81993ce872f7778e. 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/DEZC62378651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0955e21255ea76eee27769a54bdf08decc812934e1472f97f2ecd90e8cd43b56. 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/DEZC62375588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954f0e7ba107ac0438f8cfd83bdb2e554a1de8da917d8de7db118268f29a83fe. 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/DEZC62373989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375ca812d5e2709aab3b712b1d98df7d5cebf498bc7376c9e9f8800b431d86f1. 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/DEZC62117858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c072a4e4b4f9f89ceb6b6854e671e83237ec000c1ee4aae9f8e55953d26cc3a. 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/DEZC62176398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6960491b8f473d606040cabc2958a609f34be68311092bf499d9fbc51b2e764f. 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/DEZC62597093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ff077e94daf06820e6cb93d38dcb7370d61d6c77fdbea243ca6d04f8de3c50. 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/DEZC62577338.