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 0x9977bff652cc84280e3e2dfb91c7a3f5cc2ecc11ef2ab89eee862a19a720bd78. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51843586-9d04-457f-95ca-7c8af2d35fa2.json and https://artists.proofprofile.net/proofs/artist/51843586-9d04-457f-95ca-7c8af2d35fa2.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 0xad81cd085dfc5e93cc2769c72973c420d93734cc836b41c0173153f69ac44ef0. 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/QZFZ22300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd64a727179574fb80c7bd3902cedcc3ee9c0dc2ee0686d3f0d1b010d2957cb. 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/QZFZ22300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62494d8ba451c84ab43c3348c6c960b4b938d8fe5d31ea91e6c78b5a3dcd9de. 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/QZFZ22300468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6071978f57116495eb3a7c6aed9588d4f41a592a11fcd474659b7541409d2da. 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/QZFZ22300464.
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 0xfb688c7ab75846f0ebdc316f201ccfd6ea8a8775959c05dcb05cef5aa2b625d2. 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/QZNWR2237562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15722f9950c86e1e9aa22dc3d97acdd16c7cc20f036cd98c3a369802b05f745. 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/QZNWR2237572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abaf1f30ca6daefe068a13ee492ef6b338d7c3f384fd4acb1367bffb0282dd7. 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/QZK6G2138606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbe01a2fb1dbea2fc4848a29c667dd181c4f13c7c10668eaebcc4e7c537d189. 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/QZK6G2138607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a2f9917e92601719c2381e24ad7ea5087a716d062dc2da2310f8e397847d1e. 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/QZK6G2138608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639f31866bceffd5e5030988b03d978d53e714e148eaedab5e2346750848f398. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6G2138609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57691e459f2fd5b58b5dc8006110e3bafe286d9a54f4c7008fa0ca3a3b3c49df. 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/QZK6G2138610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b6ec2d06680ce27395304658b369504102a08222c7abfb2b6f6725ad820440. 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/QZK6G2138611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e81b5ac0d4527a97ed6e1574200cab94837227568798b78cb15ec878245ed30. 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/QZK6G2138615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aeb727efa79b54bf0cb86e6495adadb720a82cff2b86f57334f2b68c6ea4c2. 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/QZK6G2138616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183d03ba814da20036f5e21a1bfc809cf14fa593210990d5220d3d0dfb2fc5f8. 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/QZK6G2138618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4e93fb79a43b6b52dd747ffcf1251156b0786419dff580e5e34fd95d6d5294. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QZK6G2138612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32221e7357d67d57c9d6eeade2cd15f3e6e049052ccc6e2c8cf558540a908200. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZK6G2138613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da5360c7c30bbed8f4da2aecb031a8826125be80e71f5caa94e1d89996dcb61. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZK6G2138614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ed5aaa858fb8cdcdd8ec1b9352412f8ff1d9f580b060e02dbc57b2de84c842. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZK6G2138617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa89d2d801de08f2b505cdce51a864579fd24e8244bbc487f1297e95678fef9. 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/QZFZ72251903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa847e4b4f331c38aac3c73b6fe8984d91a97c127675dc246b101edaf5c2cd7e7. 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/QZFZ72251905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781b0afaeae30b4913e448ae1094d1187d342214ae8f06a96b85eea11daff2ac. 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/QZFZ72251906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721accf9db8e462b25643d23404ae6697e049b285af17d68116f2efeef3d0622. 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/QZFZ72251907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0b78db7b29ffd50c7b5d7507310d63fc835eeb8e8a65abaa6bcfd89f9e8789. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFZ72251904.