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 0x5d091c14b4b649d79760901794917daa51d004c06102a163614009daf89b9fd8. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4f8ee33-4a36-43f4-a313-33a0ebe56191.json and https://artists.proofprofile.net/proofs/artist/e4f8ee33-4a36-43f4-a313-33a0ebe56191.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 0xdc6b0e79ca4c7aa88de89fcf4283a23100c03696dcc7f8e8486b8aba6f205747. 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/TCAJT2542680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30b6337006d538e4407465d39d74131ec3a0d2b3793cc2120b6a61cc0c8564f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:47Z), 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/TCAJU2550028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c37d13a44e85cf5602aa7dec4c49e1fb6b499d57025752d144e48959dcb4c1d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAJU2550305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568fb4d6fc7e35cf24fd8f1e77118dd129c38f076f1f3fe634a19173972f2955. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAJV2502623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc894289f05c75b9a2ec758bfab139c2a9d5bf117ad3d9ab6145afe481df48a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAJV2502667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc299615339972dddbbf11a9f18dcdd3b8e80fee8ec6892226fa416beec648a1d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJV2503055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedaaac30b6b1fb48d304bbb1f88a6bda825c4b80292f4beadc328762b8f3100. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJU2503024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d56d3a9ec9f7bc85dd4923c611f9f1b3766c16916497a7509670969bac9da3. 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/TCAJW2503063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec8df83a7fde794eb1ef4318adfbb2ef191527a25625defb37eacecf979b9f4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:21Z), 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/TCAJU2559215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c36e7922dc833391c9acafdbfe151de6e7739c3de5a9172a13c8ded0705ce4e. 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/TCAJU2559256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19bd92ff5f2a356ba18558a83af07b81232b2fe285ff2ed95f2fa066af195791. 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/TCAJU2559208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f258a01ab1e7105c30a479346a84f0fc92c845729f8940f89e477c14ec88f0. 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/TCAJU2559201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff57a1e222924a0c9c39c1ea30c474cb2230dd221c4ac0c89f556fdf7f7c5bd6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAJU2559197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d42b6e4fda69112922c8bb5d5d1f26da403ffd7d40edf0773131166a99e6ec. 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/TCAJU2559228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154d2233f29e87a0d541e361f75c3c730d4066c116e19a2387f3e5763d1f17ca. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCAJV2559273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b858123da5bdb3ab58f98112cefa47776396b5d7c3048b96d122d2129c0b2. 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/TCAJU2559266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53dea34d85f34146bf4073874584a22492510c8c9642a6419624e282b3dd56aa. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:42:15Z), 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/TCAJV2559233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f9a5bcc0dd1a25e786ed4764ac2304574ed9fbeb4cde289ca7cab9fa627b28. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJW2508790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e09d1113e18fa495ff89dad96061613f29938e9946ebe0df64f0752d5e4188. 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/TCAJW2508740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dc9bb94d5f764615bb9f6e8b921bbb748a5eb705d715fd2f57ebe2162bfde2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJX2508766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1046016736b400506484934ae676deb690ed65e7c123285ed62a10eabd8541e0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:52Z), 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/TCAJW2539469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a1cd5852e5c6b6207eb963b85832afdce9e41a91d304cdd1dc5355e325f198. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAJW2539560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe8ab365949edf9094452e3e83c07d1499d5fd4d14f5af36fe3ced9d1d2b06c. 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/TCAJW2539626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdc5558ee9d2079b0670d973589959867f6b44395e18212bc693dcc8295ca94. 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/TCAJW2599037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb5e35082ff1630de7ce6e28c5f17be5f3cefda5c4040de0b2dd503e548ff58. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJW2599069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8115bcaef3c4a4c68ba066b48c0b0465f7991ef35dd45b429daa05a50fa45a7a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCAJW2599042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c4507a1454a3b429ba6dd3cfc97bef2c8bab0f4dc1ba258e1a0ef28c3c24aa. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QT65X2503416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8f7d1783ffdadf5b0947b39f1a595d7a68bb264aeb4cd4bf218b9a2b9fc8a7. 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/QT65X2502999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe606b2e143505f865a816462818e6f237e8b354688ba5a6f0a0dbda98a38e5e7. 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/QT65X2503646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9716ba1c2261fc9a5d08cc663be5d41ef72b1e2de0bf420f8b4739ce74f28730. 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/QT65X2503600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce74d01e7f0462e873baecc509c9f6e2cc552b732ab1a226ca44790baa23db8b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT65X2503344.