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 0xb8a4fca7676f6ebf937a355a844d9ccbc7f70c7a61155c73b2fe1311d6ad165c. 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/243b07a7-5716-415a-a5f3-d638fb875168.json and https://artists.proofprofile.net/proofs/artist/243b07a7-5716-415a-a5f3-d638fb875168.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 0x0e3fd10c348e1f8e2d6cdf239e32166f652c973c6a80075a62c2c737d7f2374e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBKPL1968851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc586abe5f5eb0a21e502205904bcaac53a3234891b8881d4da3e7b53994090. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZNWX2083109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97e3ac90ac89b4dd340b01d7cb72a8987b14efd4c5c19ea70344466733c69af. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZFZ22181813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667aade679f4a1268d1d3a42f36bd9cf69631ee3319143faee1a7babea92b2c7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZDA62112339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ba71f7ac55baa93941bbcaf82b3ebe348566d642cee45854ecafd6e703de9f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZHN62229811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a03578efb5eef59fa3e6582f2eac3ae077f7319ad7f45bc6fdf93e5a79ef8f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZ5FN2396277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803bfd236fb90e4a9a33cde80f1baeeefcffb0763b1801d49a0898fa9b48b9f1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBRKQ2390373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8350cf0e6d10c108edf5377d70d8a08b134fe733de3c5b71fa83fc4b635ea20. 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/GBWUL2374678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ab98feb709e50f98c8057dee3384b38528193e9ebac1680d0244ab0813c81b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZ5FN2406797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ba71f7ac55baa93941bbcaf82b3ebe348566d642cee45854ecafd6e703de9f. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZHN62229811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66952add51395150b1b159de8bc437115715a9d6ea873932eb41c44a8c30edd2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBRKQ2341936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1903e2c51e6f7ebada436d5ca8bf583f3ca3c0bb2529389fd4bf32d3183eb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN32498749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf25474c81ffdcc6792fdb776625bdb5259e6fba069cbab46599edb672dd50e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTRX2454094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc4e4141524f9b41353ad642e96a8b4e20a463ae1c63643823060366fe4f71d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWDD2417559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5c6594bb216e93ab30f1a01e8c059671efa7b49dc5100d928a8da559c8aa09. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTRX2459260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2968fe032579546b183b64090d8436a3139dd1a4f815144909ae8db0186438. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZTRX2459264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc258f2d4faa2cdb9a10ec92e4bfb6cedca635be3555a042e22b90bfdb7fea067. 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/QZTAZ2480322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac938c49f3d3509014ab5c867bc6b1531477071cd27a73dac3fb78a800343bae. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTAZ2455243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac938c49f3d3509014ab5c867bc6b1531477071cd27a73dac3fb78a800343bae. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZTAZ2455243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301dd871c257baad0721542cb9eca4eca58a12efbf96d4b8811cef40c7241680. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZTAW2412753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe660b9d69fdd04c20e31eb0f2cd00b1c1d0ce9c4885e5779cfb3661d7b76a262. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZTAZ2457088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ae8dfff27db4587d72c50432a37ca7885c5bc42a6489b2de99c348fa58d16c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZZ7S2428421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db0c1c56b334d33984e54224bc067f56d667feca40ae2fea57592581bc7d3a3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFX2429153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf25474c81ffdcc6792fdb776625bdb5259e6fba069cbab46599edb672dd50e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTRX2454094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f6b703834a96a719d23ae79a407e210a46bec08e7f9d92fc223c90fbf70f78. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTRX2467625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203d44a3ddf4a155a20b652f548ba076df9fb01d1c7bc67da3d047c3d1284524. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAT2410585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76b969b8ea98b16b641236cdf8e29dbfcabdfc7449d3d27dd0c552122212f30. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3EZ2486084.