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 0x34e2c96099c6bd0becc35f164ee442e856f08e1de58b9c64a0caf5250fe1eab4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce856ec7-4521-411a-ab67-5155ac5ed354.json and https://artists.proofprofile.net/proofs/artist/ce856ec7-4521-411a-ab67-5155ac5ed354.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 0x7b07966246b200c89d0a04076910739164f3a8cf73dc75a9aea36a3f163b391b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:39Z), 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/QZFZ62450239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d9ac3a9f02bf03abf671e43ff66b534cbf612270057b8ac444f1cc8676913f. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFZ62450240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703295365cbe96616dbc5f602357cb20550509c7c977bfa1a57b8ad2938b03a6. 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/QZFZ62450241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1c51392ac61b7f37fe5a5efd3b727f8661bcc9ae2ea3c83e1ca6283178c64e. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZFZ62450242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b939582542e76e325d7aae8f1753bcfa1dcda312ff51912bb803367fdf9754. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ62450243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feb3c790c5a5d5b85bc880126a9f210afaf34c768738e12821e64fbd4901593. 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/QZFZ62450245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d75471d9c93343861780c6c36d02a60084c54ae576182e756599b3609fee59. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ62450246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b530c45d4762181a73002a693bb1b5c70877ff41437d98a390c3eb57b8d148. 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/QZFZ62450247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42353553485c533eba6daa1d045464bf8e400580705093c825fa4462a15d958c. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:46:14Z), 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/QZFZ72475433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad624c25ee863ec8c2d3aa0cfa4c265531067366b690a97ac04e3e20113d19a7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:45:36Z), 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/QZDA42446337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fb988910735651c1f20c5a12a570f5008deebbd6ed41c1e73ce5d5864cc409. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:56Z), 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/QZDA62454815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b03612a99a7a653331858bc1dc3cec87881214d9332111d717b716b9561333f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZDA62454816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850fb8d3aaec1e901b116cd5eb42019296f42e9950442b96f621f007fb832bfa. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZDA62454817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508f0f19ae982eb68df136176f031d79a26281a5f15475d12ecbc64a508055b3. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZDA62454818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a57ed62bc59c082283752292c7469fa41269bd6c85128f321429af0ad63c70a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES52418173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609e703c8a15ebf9038f95c503b61a022a8687bae09812ef692e89cf2d79737c. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QZES52490467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b6032bca245a19473d1b47d11df968f86a1b772de3eb6fc1d1fc7f5a2d0953. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:19Z), 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/QZES62427635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926a862b35fc9e0c9ada29faca952f5749837ea7936b5b916cbd4b0d3d38d423. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:22:41Z), 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/QZES72482821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2757eabe979fb7c2d7822ff167f76d69f303bac86bf8ac9c1ae6bcadde23490. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:38:26Z), 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/QZES72491428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eda825869e987b3518df983f2e78cddd64032117570d6bac74b7259c89ad84. 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/QZES72482098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3090aad41b3a02c309143017f186049660c6f805b99a065dfd171c4b61d9180. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:35:00Z), 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/QZES72492381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbed7272d1e3ecdd292fc6a406530f34b8e82cc4e5888a0943d6c9661d53e885. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZES72482827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7657ab1c9faa7b14abedd7389b6e303e09e9fe8c49f493644551668360c488be. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6Q2409818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c6f45d6bebb6bf0024ea248e9be17123f90cd63fd947bac5e147c3e97b2082. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:31:53Z), 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/QZNWW2464260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027faa77fa92a13b45b6fc779fd71a61d9f7f7f565da02502ce38dca69888a99. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWW2464262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a7f0d5138c1c6b4f7f120ac0d2f7c41387cc657b3ea942b9e5767ed0758bb2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWW2464263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a129a6d1335c32649783b526903901c2e6c7557c234466500f39f82d3289fed. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:22Z), 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/QZNWW2464264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6de2cbdffb61304edc066505b685ecfa74119d6127a9f81603bacd8adc2778. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWW2464265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55ca6bb4aeaa717da2d16fe3782b9b588db7c250ba0f319cd1553e14ce4e6ba. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNWX2465022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438ad7a56014489da8b9f5caf6271222553641b223897cdf4830b5aaf0131ede. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFE2478576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbcc8324418f329762093674ce88dc946f3314ee4707a07a9499292412f9731. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6M2504613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8a0084de1791e2e5ffcd856b6062ccbeb31c78849cb5899b4071d8e533ffe1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:39:35Z), 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/QZK6L2560025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5053b36ee83a7a41b98daba6fb59b8eec86b2b9a0d3f1a2b87bf6a69d799c005. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:09Z), 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/QZRP52563442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11b24adc93fec7b4841b09d1fc78998df4a2310ecb951994f64861c760d14aa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBB2566140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682f8be1384d3cf59ffb3b349d85794887217639de38c3cc4665855c7e5c9cd7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ7L2551841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137f1302afe5dd806dc1f69f2784fc3ee043723a2814bddaf8167eea542a1c33. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7Q2573586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc27135131dadfe744fd1609c60e30aab71824e34856f94391ba5e1e09ca3b1. 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/QT3EZ2537396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99449dfd4ad1c85d5a212132f51ee31d81fb707ffd299e2758cc18d4cda183d2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:02Z), 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/QT3EZ2535081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02ffdd136f2639a32674e80ff0e4d182e0a1a1a3d54e4bb2272b1ce9ab791d2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT6E72548503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b456fe8d5fc4d14d7245889abbfea71333e140a8778798757c568801f06465. 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/QT6E72548329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3ae0619b946111c4b8e63b949fb5b4df9ec1bd13824e3108d74b21f2c773ff. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT6E72550808.