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 0xef269a96b5797beba6c61cd87afeaf3fe64ec8590959db7f99b2550f3fe5ee37. 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/7a4d54eb-edb6-4861-a989-20a448b5904e.json and https://artists.proofprofile.net/proofs/artist/7a4d54eb-edb6-4861-a989-20a448b5904e.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 0x570f8e389e0f3dc67781979c1cb5f5412f22f72b18bff852e7ba99d969aad877. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HUB881707111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e029b13dd177d3d1f1b312fa65665c0df06acf044593c3fee6dfd5431ffd6ce. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/HUB881707112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa4cd57db89ea2cc8be51935461ba0c6d1be3b59505ff44cb1bafb7daaa0736. 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/HUB881707113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dad31927e7b460cf6c80d9db5c1eb573f4e3fd38acba8a874f6f691eeb4043b. 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/HUB881707114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e7eeafe15215f906744b21b07dc55045fd0e228c350069bf7b290bf3681918. 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/HUB881707115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c7326a794cab1d9bba0dcc651cc4901170c93dfb75faf2688833d2046859d9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/HUB881707116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b5a3f7d7c66980b1217fb170c5ac1e4abc90c546cd7f25db2bc663d5d89713. 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/HUB881707117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9401a5d134fd13fbe7977bd30801c2f56257a08a842551de3c81394a126f4642. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HUB881707118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d33d01b106de9d3b2546478df68c89ccc7353d095aa790617a9adb7325d13e. 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/HUB881607119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236a7335f39387ad3e5e503e7a0b590430fad2795b59e119255bfb5bb6d0499b. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/HUB881707120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8441e5601728ba7455c409885409a3887df17fb5a6d31742c1488dd2284eb6e2. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/HUB881700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67d835f3518ef3b7c03bfa938f712c542d629f0001a23acad4381362b41dda. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HUB881707122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf582ac9f7d224e220ea4d4c5a89bb30fd259e114e49880e1d89cce7779dc7c3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HUB881707123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efef2fc28cbca7b78e7b4045cc14211cc081c9b2beb8da21cea28069e58b348. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HUB881707124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e6a38eb4d2e6b9f291087e2c6eb981477147ae4b53a8d7304515b6b1e4b89. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/HUB881707125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2232069742532ae6ffa2a71c5c66a20cbefafea36186172dcb775402a02dd87a. 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/HUB881600302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23ea76cf5b862e9a5726225fe3b3f2d51979dcdede5c0af073bba867b785133. 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/HUB881707127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c4db884207237f735d246733ca7376405bf17abb05b4e6ddf5d9ec3992b712. 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/HUB881707128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404398d3be255c4c1e23faa5ceb54a6af7338f02fb92347c54ae1bc533d74773. 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/FR96X1807743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd63d8231d0948e99d5807e2f7f161e2c33645a3c7041f14c76b7ffe970f3867. 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/HUA611601109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cec99397509fa812dfdbf26ac256e6e733e3b1ef018e5bd50a5873fed93ea1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZTAZ2276304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347d6afc5e626b2bd0bda7d8ec5ecb8afe002928cdf51fba4550230417a951c1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/HUAHC2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10de615a4dcc9ef71847c4f59bc788add504752ba0013d6909d6d3ac50e8b4c0. 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/HUAHC2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5098ebd1df1d74f3880377212da800248ac6fdc1cd3a81522c8106678feaeb79. 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/HUAHC2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7661a0239888cf98d8084ff7663189be74f2560ba9b1226fc1ac0c0a8d767e44. 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/HUAHC2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc984981571ff55cfe59b25bb7d96847c1d9c63c71f5d790f1cc0e7c09083a95c. 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/HUAHC2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c4a08863389cc082c39e2b4ee98fc8ad03f38ff6a5b38494abc7d5089a70aa. 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/HUA612200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3222a07254a0cdc21fb536d36cb1b8439418440ed7647aae71334a4079c72fd4. 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/HUAHC2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd807a002f6cada2e3806a344178257a0c53a282c6c450a1a5f22a53b00ccbbed. 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/FR2X42177784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163a14666b592a337c7d9ac6b5bcda8a3f3295494d4f1681bb1a657658638bbf. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR2X42177785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdadd2684a10a30cc2c10171c81a703e7160edd9a58c59a64a27c66328d6e90. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR2X42177786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8441e5601728ba7455c409885409a3887df17fb5a6d31742c1488dd2284eb6e2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HUB881700301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bc1081c2a63df53fc34be700cedcc32998c93b55d3d9b18b0fa79287983c54. 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/HUA791900006.