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 0x3f1c062e86da966caff7c0cc37a2eff0c2b2f42fbc8d26348c6164000dec5280. 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/d381fd3f-a539-4f1a-8699-d96880b45411.json and https://artists.proofprofile.net/proofs/artist/d381fd3f-a539-4f1a-8699-d96880b45411.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 0x5ef23c304684f06595a533777d42777693f16465970e4e3a7b7f08f5b3f9af9a. 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/FR0U91200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba96849a2e86afce3ffbfe2d332205f7c5ce5e3fd582030d84655b6ef03a055. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:34:30Z), 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/FR0U91200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80fb2d7106647c18b0216e974c3e7fe9c520080d881b0b29e68a9bab7003989. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/FR0U91400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f011366697ac593401f13b73ef79e1c9ac7d26e0f5915bfb72dfffe6d540367. 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/FR0U91501230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d824319da984d1d7d19ff9754d394051bcfd0e3acc9d4b5b9a1f42296c8bdce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR0U91501479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8823c236b08a6906f84e281de86a6b3af70328ef2c65d42fde8b7b5bed851c. 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/CH6541821345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e03554e294f4ab96a514050e7036faf37232f6690a4f96ecbab9f658b8596d5. 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/CH6541821349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0477e03e9c3e8b55fa1f530fafce65dabeb160e4380a3caac80f65ac492d4c0f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:30:46Z), 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/CH6541821356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d85dde563e6513e33f9b67269456e870676c38021094c3796ae74b9b045d3d. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:01:34Z), 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/TCAEM1962550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f15b8563989e3ce6eff26c2e89724716821d57488b4073b609059df0bedbc65. 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/FXQ692000056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146583e66438dea3aceac16e2b021753746959594e7fc2f5aedac63120f25b5c. 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/FXQ692100156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3796f9a618c2c9e2c3e04255436163cb38e517b442aba1c2f07aa6f21fe6796b. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FXQ692200123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2218b7de3eaf854c9c26b3788dcc2e85d4eb40317c91ef9057c350000942f. 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/GBKQU2386857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a7a47e5bf6539042ae6a4638ac29b6205855ca6e26487bf8048bf4ac4e13a5. 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/FXQ692400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56272a983308b67bde19b4afeec33e4a5a8cc16f236bd6a7344bae7c5e0c4ff3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:18Z), 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/FXQ692400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860a3f2bc90ddab7a77b852180fd86455a623252e0a96da65713aa5a2635e7ea. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:26Z), 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/FXQ692400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85eafe9b5d01a2ede9aee60254c904a40fbe6c849a66677d5cac1bf9cac3c475. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FXQ692400335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c898634a9b784b616767ce3e6984fdf5ab87276eb7f0841f68425c78dec0c92. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FXQ692400336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d759483fb5bceb8dffa13f3b5a77aa631082b1503fa9abdc744348e79440e6e. 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/FXQ692400338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa314c95713bd7f0c686ce1e3415179759417f41cb0877e24a0d116efbfb3c8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:46:40Z), 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/GBLV62415922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1621cde2859038ace399d5bb9ceb4cab17144bae5d5ce92f34ee2a29571e5bbc. 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/GBKQU2500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb270986e22a8fddd60c9e456b06709f7e84079e022ab24eb20d2823b88e6e89. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FXQ692500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b20d7a8726e3dd3a87b727160ef8569b0f412244aefcd7a5df09ba2c539b8d3. 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/FRIDO2010943.