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 0x8601c30884aa879ba73557d5e4d42cec897ff3efdd9bc17cf51d6e152b622a2c. 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/5aab1800-45cd-4c0d-bc27-f7d674277204.json and https://artists.proofprofile.net/proofs/artist/5aab1800-45cd-4c0d-bc27-f7d674277204.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 0x1f3a2f974878064fe0d629626db6a7357c47655b396345dd3c0d9dadc5c4074d. 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/ES51I1100750.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0463bac02e7f7f1cb7341f6c30f00b017e325ed9c6e7cc079e7ca01d332d3cfc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES51I1100756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84073859ad598bf92d5565607da80ad67d2ea922352d0749c57daa8ccac8abf. 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/ES51I1100772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c01eaae316786938e7119942b2c148b655023c16df62cab795fe65a8424dc2. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/ES51I1101814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4944378408b03cab8675297053a40df99b3f94b548f5fc2983c198a53d91f874. 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/ES51I1102050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc733a399192b403e12f7e2df2446eda0985d2f9827f0369552e70038915863. 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/ES51I1102056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278ebced8e0c5c86b7b9755dde8ecfbb0a44cadb9a3ad31c536b043a42167237. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/ES51I1102765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d08cd2744e0178dcd47dcd20f221a7eb806bcf3fd843f44e3e85abe3d3f5bec. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ES51I1102775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51766679d163097522afc9326713d89998985d28dab1be70d435a2f1b78d998. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES51I1102780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c94dfef9d6d276abc57525f47e1347b0635b6898d8e84ca48121ddcc8a9655. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ES51I1103141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0849a30c49c4fcac1967e05b59832ddc84e11139e0424b59b77ea1ad83b2f0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES51I1103146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775ed833c94c1b1f5970e3f07ebb3d27dd6b1253c75cc6b87ceb71548487c87a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES51I1103147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d80e37c3c370388a0704b695116202697c35bc45dc0ca788426adbe463d7dcb. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ES51I1103151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2f8e7355481d80e5e8e0bc55baeda6c2d73091f26566f8d40114ff20e3c5c2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES51I1103153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6a27c19ef79438e9529dda4ef4ef99b3be43ff6825652c225352ebfd5f79c. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ES51I1103155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a566c9426d36f8ac41b0dafe42178ddd5b30beb9ee8d7364299a4ecd51c498. 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/ES51I1103157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d96c9daf74a9545a034d0e876e196ff927693e01d640639088da764aa46f93c. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/ES51I1103160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa44e88e97168b26154885cc4315c6944638028c5c943f9dfff044c83d7b8ee. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/ES51I1103161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658ca36e53eeca4c495ad3d5465c2f799729dd8243d8af1b66d4dd1f0b83a1b3. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/ES51I1103168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1781a499d430eaaf90cf3a6fd605b4d06805964d1d76bb5efd500680e3f94e8d. 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/ES51I1100647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eb980ebc01bde385d49092ef83d667ac4331ba6579fae58d1faf4484830bbd. 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/ES51I1100652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8649d6bc779c432b8dc790e04a00c5ee47981e6209fb239e630e360c18bb304f. 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/ES51I1100657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e0a711f3c99a2c85172a54aa5523b4496af85bc8b745ec0b36f90d87c3a475. 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/ES51I1100662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b4c096a1ffd41ce88e25a49c1113934e46afb5b4cd6e6a20cb1033b1c0b633. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES51I1100667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a4bad31964d4e3834452cdec8bd28ebcda894c12e8c0cec3b9dfcae909b508. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ES51I1100672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394c0fa30164358e98351173294c6b1f02cd7b086153a143f19666a3bdbd1daf. 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/ES51I1100587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193a8b48aed35b63e3329bd027801d928349948634638b3b6b7535d6c945818d. 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/ES51I1100592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103a45b398f589a34a74fee6302e03556c0b9b8217d5410e2b9c7f54689fadca. 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/ES51I1100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c16fb23787c79fbaf21c7a2042424b79204422ebb63f633e33385640d452d5e. 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/ES51I1100602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847f4c21932e8e534f518f23c9186111b03812e03f7985c77e76f2103438a570. 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/ES51I1100607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78dd0bfbb5d4f5573301a6d63042db28b5cdf5cff047da045fbbd513aa8846a. 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/ES51I1100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca12023be15573b2732b9d030ec808f5a4c9a41e23bd17ebef50e18291a1df4. 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/ES51I1100527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b144cc00e8f73dad6edfb6513c1de0ff981e640cf710c0d141e5f31deff9bd. 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/ES51I1100532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c00fe891980fece8e0f9ac82dfbf8d41693bf465519eecc2911159d6eabc7d. 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/ES51I1100537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e12b5af3822d3d82eeaaeebf346a0f2269c716b4bbcc6e06ad39ef63b7d889. 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/ES51I1100542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c23c0d5ff647e3bebfee5fce4edc59bff0a3c0744bfe6904aaf2d6950ebcfa. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ES51I1100547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f0e700f6c3a208854d54d30d6ae510da66377e643f8d65e851f18b38d328b. 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/ES51I1100552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182f46500ad3e9aa0416a337009e713a2fd0e1a2f524db53fee41ec1d7958a0. 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/ES51I1100557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa835e5d5cab4f8bc0bed5040aeaac1a8b808937fcf51a3f13688dea8dffb2d61. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/ES51I1100562.