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 0xab0528f52928d412f70ba8ccb4478698ebc8de660e164f0b6c061c882bb1b33f. 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/406cce47-44d0-4ed2-92f3-4c04bda263d2.json and https://artists.proofprofile.net/proofs/artist/406cce47-44d0-4ed2-92f3-4c04bda263d2.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 0x1f6f34cb3c16af9697d926452ab5fa9838f9ca03384453a2b578b369d0d0c4bc. 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/HUB431300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a15dab3d09118e49b2dbff1ef8e5a61a8941866ead57b73d64e3e6eae04299. 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/HUB431300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5555158cddf9d7a74da20943081ace893edc273b902ec29d03a7f69089663. 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/HUB431300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4afc2a39dcb384e41525af16a2a66e104b45ded0f9e84d0200ead38d964dde. 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/HUB431300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55876b264fbb0f987db7673a4393fed611325a13caa0e390220f9daa7565532e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/HUB431300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0288e22be4df11da31dd6e3760aae6cf06729eef0fe4e6b7a9758dfbe192989d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/HUE641400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfea41abd617fb28663c60a0154e066b705afbc98543343dfa52a9d3a236387. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/HUE641400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba983b820e6e53a3311af8c85afd74d0f05424a3dde2fc8b650076ac694f5b4. 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/HUE641400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074380a0f9504e0169748ff822761ffc673211e23af48e27643eb21f1e6910a4. 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/HUE641400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b7c43648a82f509dbe5002a875225be96895fd715715d3a4cb02fffbe42f75. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/HUB571200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b7d1ad37b75aa717e612006764dd1fa79a785cc0db92ee3cb301c74e55c846. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/HUB571200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5782b433ab92d64a832351a4f7e5559ca87997f6e4c56e4725591badf9b805e1. 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/HUB571200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f78ea40168ae8aea0049e9a955ffbef735154fb2d9cd98f3c65363f9842ef2c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/HUB571200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa283ce6106b82e523a7a17c1f0dacaa7431bdb6cbd955ba5613f02b05c0b790c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/HUB571200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce531b5d9a959a8229a9fd717f126f7d33f4150e6c4901e11a1aa834d50a0070. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUB571200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b23ebff72f91aa1cd1f481eeacfbf7ec70e76768e11fd852cb107960fb2312. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/HUB571200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa3e22f15f7fc5ff79bb53cde2a15f3b4c37c8bfee8d4848112686b1e140db2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/HUB571800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54c45cf7c6bed16f45ef78f04dcb470e5a872d0d6d3501d57cbda766f4651f1. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:01Z), 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/HUB571800094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04092a04780c0211e7cbcead3228cd6250e4c5bb8e048bf630452cbc5b9e9972. 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/HUB571800097.