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 0xb22d3ec836a766c0cee21fa4fde3e70924295545b5037b561fefcc12d4724597. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/404d8610-6109-4883-9313-912f6d3b6567.json and https://artists.proofprofile.net/proofs/artist/404d8610-6109-4883-9313-912f6d3b6567.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 0xfc1ca3d2a3eda25365651c910f01b7bc2cbfb569fb9513e265278d25e94551eb. 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/CA5KR2302530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacde32904fde60defefb13692c60f27b3f528a23c67a85e60a57db0de8bbcc45. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CA5KR2302531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a292452835d368c18699c384a027a11e509c0ae56923a8e5fb9ff7e97a3c74. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CA5KR2302533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aec7f64b4db9ca801f0ff4efd5474af47d1e06cc6f51b02655c6f6a8e5e1625. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:26Z), 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/CA5KR2302534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590e76ae26c86296e9dfcc9d99c688e8db45bb0f5f0ef5a907b64f8917c6e4d8. 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/CA5KR2302537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd402992992c4773160a1a542cef8bd489a8532647bf13972b6a2a5b930d2e3a. 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/CA5KR2302538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a55783d686d0f308f80d276dd635ee4412e94a8c59c6dd44f233ebc90b6a001. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/CA5KR2302539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788398caa3e4730acc056adf167b253284241727787fcca7de992eb960781094. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZW9M2380150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23d5388910475443cf75e6d61be8ba61f6d4cfd9adf9af558fe0fcdd617349c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZW9M2380151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7888ca87c60a1486bb9dcb162150670e52c607494e6f013ce4638c8908fe188f. 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/QZW9M2380152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93f25c5f4377f1402e73caf234c863e612f081c4e15873af63c4adee6938bb2. 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/QZW9M2380153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e15bda4dc72e2b3eb143407591736ed8c9628627cdfffbad7e48ae007edd66. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZW9M2380154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b88ec975c563fc83742cb7ecdc9d51231fcb197d257ec8dd1b4673b4293fbd9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZW9M2380155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db48db9a539b83265971e40df6f4189929d09dd166e4107ea081f897934cf4b. 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/QZW9M2380156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51ab81c2959011104fcb1372fd47cae2a2b1e7a75875d9feda5f026a7118714. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZW9M2380157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b678f12c653f96f3cfc4fa01b67d5e0cd4ab6f09ab5adef33d0ae876d8f5c9a. 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/QZW9M2380158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51142f9a7ce5bd09cd8655862b1dfdb26cd7804adb78646cc389cdc7965fec9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:30:20Z), 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/QZW9M2380159.