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 0x061f541c0070aa2c8369f29496f9ef48701ca61433e9f07b4e79929bb085b941. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa0e0308-94a4-40aa-a76d-28434930d379.json and https://artists.proofprofile.net/proofs/artist/fa0e0308-94a4-40aa-a76d-28434930d379.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 0x92968170c54e6c8f34b793cb7b10c7b511120fbd9e3016171bf3134b06a38877. 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/QZWFV2522081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a49423d7e4abb17faff73dc8c0175fc6798de470c8c1687205a7104ac1b6fa. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:16Z), 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/QZWFX2526792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598c8221e20a37b11502f6a73468f66e369335d1c5ebdd56866acc139cadd38b. 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/QZWFX2526793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d5e935bab380d1d6206b864fcd695594f6ffc188a5dbdda37895d2dea8b6ff. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:10:18Z), 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/QZWFX2526794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194b1de02beaf18535f6f59e92ec5fd421e205af05571abff0906ccb92cd38b7. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFX2526795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3e4f2cd18f1f846a0009d655939fe6ed469e46e9d01165305897f6cbfe499f. 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/QZWFX2526796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e5852f26e463c6883f9eb138195242eb8fa262210550fdafd596aae1dd18e5. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:36:55Z), 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/QZWFX2526797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e4710d6aa82ca870ebbe17e46723e63f911b1c908e019dc9e4ca17e8b3fae6. 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/QZWFX2526798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f42c4a17715d95eafac490e052163576f503510317a625ebe74b35a2e1a3366. 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/QZWFX2526799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c23668e2aa96b6d3b95c105d4e23f6af7755ea10fecfcd9db82e42962b83501. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T12:00:08Z), 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/QZWFX2526800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98469faf735bdbbdd0fd286453f05f8dd08bab83479a55570ffff64baa7dabb. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZWFX2526801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93827f86dd180085ab13e067f92629d1f900277e4d13ba071de50febe019f67a. 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/QZWFX2526802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfb52271a7de05e27318e276b013d449f0759cc9e39523b92fee13f4700e22f. 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/QZWFX2526803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cc5fd83d846a029676f15bab94f189086d44b53f1640ebd9270728b3a8c257. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZWFX2526804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ce9db52757772b29f5df2869c0b491e77c29a2d6d201d13e58ee607da6806e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFX2526805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f3b473905cd9afa9b0970814be630e8bcfbcb7c1cbab27b223d8a6e0d9d6bf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:46Z), 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/QZZ762537321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e09c2edc36443fed05fbfeb51477b8f86ecf9c2697550b5400bccf88b1b301. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:01:13Z), 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/QZZ762537322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6bf49b0bfe0f28ae4462a145d4231bdf497eebeb54abd960e18fe4c90199a9. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:50:19Z), 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/QZZ762537323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a940a05c1590127f458f8885f8147cbc89633f24c9f2079f4401410339e2b2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ762537324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5f294b5e0462ff151e9c2d7600ce4047c22bef1ce693bea42b6ae7dbac4c4c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZZ762537325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d99e0c1d2bea258d596874f2f6c6ab49eda88a22b0157baf2bf29143d5b39f6. 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/QZZ762537326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8f6dfb1f9eaa9333088fc8ed10982b61ef3acac5e62b82836556b74eff5d97. 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/QZZ762537328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91efa519dd0e4bbc181179162bc703fef121f3dc74be815fe2475d12da09426a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ762537329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612dd57cf81c984a4ab059978714122016320189a31fd15bfe7ead8a8d17ec2a. 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/QZZ762537330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb277449f0cdb25f4bdecbb3d9d3d03fc7fa14fa7537854cf11694f241398226. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:10:09Z), 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/QZZ762537331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bb4cfb536e63676aea1b18e69b225f322843c0d659cd18458421ad6160003b. 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/QZZ762537332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaa0c6470dc825fd27b0850dbebdb776c4938140f771fb59a1dc3eeea30efe7. 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/QZZ762537333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e18a1b6f7ff6010d90af79a793281afdfae2d243aa72a5e2b331bedce0daa8d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:48:00Z), 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/QZZ772549876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26954c6ecac3fff9c81aec297c072414e0337b4efce366b56f9f3beddba2cd60. 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/QZZ772549877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c93bbd2bc83526863ea31e58faea2d54591496d4076bc978d72895c86a74d3. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZZ772549879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c146789e9d82f7d81163b7adb14682cd288d3c6625e5d63f3055cf48834d87. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ772549880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7299fc1efa618577ee06ad4f61f917229ef1aafbd843a88713dc7ca4db606f82. 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/QZZ772549881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd915209dad695df489a8097847c00941e0298506ba48bea9e9ae372709f84c66. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZZ772549882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3731df7974a929d809f53df031a0a5ccc1cc395f7b85d65d888e1f1e2659a1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ772549883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac249472a409d0005be0cce0f4d07edffdf347bf55597ffad3a5911ec2e11b6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:58:28Z), 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/QZZ772549885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e6852fa74301dfc05dfb25484c7988b27f0f956c50c5c15c1cc24f5edf7cb0. 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/QZZ772549886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43542d250c52a56bdae3591d1e628ec53cf2b643bbe2852d7f2645e154341a4d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:08:18Z), 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/QZZ772549887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b430f47e0ff7130d434e08c39494dd5df9a5bc6b256c3f5a646ef94207ffd0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:02Z), 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/QZZ772549888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941550f75159341fd1d424e3cecb5692145cbf679e99554f9b9f50e239f38edc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:08:11Z), 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/QZZ772549889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6541e98d45fe0b499cd97b9c1207637f9edc34087dcf206b6fed5e224f0bf0d. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZZ772549890.