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 0x4bf6f3077b3076fe854cd0edcb10f2dc841d9c64368710deb204713784daad58. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dee3eb73-0d4c-4d96-9244-05b98a9777d0.json and https://artists.proofprofile.net/proofs/artist/dee3eb73-0d4c-4d96-9244-05b98a9777d0.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 0x135b67204d30c1a93f718771398666acf7c98992e92d3ddc892bc77197d31382. 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/TCAGN2241548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f83062179d1b8a1e54109b258c1806256d443c4f713dc04171120b800b8c0f9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:52:42Z), 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/TCAGT2388684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce937cc3e437c896407c930f3ac6cc83e3cb5fa85e0e5e4470640afba10c6e4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:06:55Z), 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/TCAGX2387053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07c8a87ff973b9164b0f9eee54016ee61ee33f1726d76762d56d37de03e4de2. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/TCAHD2383447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753e60a6603a50a3e06ebae6f5d6dddb5b874ed212196d155a6c9cfbc00d70f0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:45:08Z), 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/TCAHK2384253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbc75b1a1555c4b8b94aad3fc1c1a80f05c1c3ed9436c19387c7797de8ff588. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/TCAHN2383251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ace90906a8e28d68a0377e04adc5eb079fc6daebbd094d7cf2c849e9a6be03. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/TCAHQ2368455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40a0f1a72e8698d48a1d3508ccf0810532bcdb2dcb340f6cc3afe6bee986c2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:20:26Z), 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/TCAHW2406266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6221b55e10633bd40ef477c3ce85c404c91e0cba753e05bb3b97b83c921f4c8b. 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/TCAHZ2454528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969cae43fd71a3096db8de993785bf2ecd81dfd52bb4df75680fe03895969570. 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/TCAIO2470863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6dbfe032dc9acced4d1d3f00020f259a21551d0c9d3bbf74fe9ad410a3c85b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAIS2475001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabebb1cdbb858e87af04e3693222ed48a72d74b02a26cc7e9b64a8bf334e31eb. 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/TCAJD2466685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dff9c21c4036bf184369eb78910aa255182eda2b164ffa9f4f9a03846f48211. 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/TCAJG2544280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5162cb1d6f1f1f7e354166c8018e401288a0d9ad94b4569c2e798ba51c7002b. 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/TCAJK2502224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e9b9c0ca74baa8abe213a1af763a1e45130130cf5849d3e13a1e4fe804a771. 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/QT65W2543770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3499aa83702552ec4c80f633a22114ade93953e8a9c5465b933c4f7939481ea3. 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/QT65W2566368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba194168f7ee041831922425b0b99dc69503b24cdc35b6174e4ace7e383cd22. 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/QT65W2566435.