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 0x41cc6ae2836c203bd1ac92c41a68352faf4ce489f93f6b030af8ee2a88e277d4. 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/51792b8c-e1d3-4bfc-8e77-64850fa2fadc.json and https://artists.proofprofile.net/proofs/artist/51792b8c-e1d3-4bfc-8e77-64850fa2fadc.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 0xf5ce47bd5e8649fe101949255601e43a7e64667b629718554dc91cef4ec11e5a. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZPLS2268274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04564ad3d9f9f7a5556d94c2289d0d436416652c0773adefa4c1f9299d03f4e1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZPLS2268275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6390dfebdd8a4f1adc1eef6e4bfd42e1842284d0c6219edac4a71a7f2152a808. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZPLS2268277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878346322f617f76c0d4cd430cc32fbbb69c5af77af25244f32834bf82148e66. 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/GBLFP2503838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f812146555e5ea38281af23967cd25744b21687973740572c35af07f3cac8e. 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/GBLFP2507983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bc04a0e9e78a7f2b22c6e4b047825965dcb8c439c868fb5bfceeba99c99dc1. 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/GBLFP2508351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964a0c729f339ab7b8276a80bd693237ef80230954f8ab693bd8709dcd12c9b8. 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/GBLFP2509963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c7ea72c42ba2163db27aa1d1c3cbf40a5030a9cbdf9892a90be8357e3032b. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBLFP2594658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18c710c7a55987e758af041a449ea3fe79900096ee50710cd997952420385a2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMA22512032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864512de9b1099747344c6454a2dad84b0bd92ea72e72c87095670f34b58bec3. 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/GBMA22524509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8278ae95008fc1962ea89bc9ddfdeb6ea1ac923595a21d6e1086238dfa560524. 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/GBMA22553852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa330088a192589de88016f28bc72e1db1a455722e8c5483dc1c2d73edb0ab019. 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/GBMA22558081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b7e78d505c7d9d572e1202186c4fe11f56a1dba6e0c4d3fe4f9c5a09f3b9bf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBMA22576943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f7a3ac06e3c25caa352d1f6d688a1914976959014cf24985dbd90233a3556c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/GXH2J2584271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be8729fa60dc4a66383ec0c3f0e4edabb008b6312dcd347a8b4c3fdb2d0eda5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GX53U2664261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d53996a04d43d41cf0d2602364c7579e27a51fd1a35dee56814ba3648188297. 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/GBMA22493144.