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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660c65ab6b98de08b02c29dd26be7e9d0e642534f0184974474363421d4ac6ff. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/586e085f-ad67-4c6d-89a9-c879cedb08f2.json and https://artists.proofprofile.net/proofs/artist/586e085f-ad67-4c6d-89a9-c879cedb08f2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9974eb72c2ddd2a7980e4451605a2179aa8b29cee90ab96955eb13dd59fe648. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAGJ2250767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b513602e9d45b3b69072f7dc55bf3d6017081c1e08f76a77687bd63ec63a06. 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/TCAGM2287727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496976065ecad6524555eced4b5709661a3d5bf9dfe9447875c0e783e28da6de. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/TCAHL2344672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa22327586a98b0dfa158058e3362ccac3cef6e8883bcca513a07fca324ba8a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAHR2333765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bade4ed3f07f98c187af71ea710c1ef3853ebfc82f86a9d545a3ebb0f61cdf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHT2335477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88968377fd3e1f51ef16721a74d57a21bf0c4297c938137ea8a14566f1cebda. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAIQ2494729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6e030da0e9ff44e4506de42f11fa001649a0f4e759e56ebc38c993fea1f13b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAIV2418219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa22327586a98b0dfa158058e3362ccac3cef6e8883bcca513a07fca324ba8a5. 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/TCAHR2333765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa0cac5d1d6330090986d79c3ceff626de24aba6d5ce32dc75b687bcff85a06. 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/TCAHZ2438741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4f57e7360b6b5bb77d7371caff737db1718fb42a15932be3e54ff71ff66098. 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/TCAJB2430678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88968377fd3e1f51ef16721a74d57a21bf0c4297c938137ea8a14566f1cebda. 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/TCAIQ2494729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5233b6f5cb30fecc7ac9182cc7e1e78aafc41d18b756da68a2caf500502dad59. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIE2492364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12c5f14755183484279ee44ee410655f8d2a4d84dec5a90f69c718578888a69. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLG662400410.
Mrowen (feat. Raiky, C.Smoke, PLUGOXHUSH & Onin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe434fd17442c053eabcd7e851c2f0f5eb24d290a98cfe92e320a35fc044543a1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL6CS2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe434fd17442c053eabcd7e851c2f0f5eb24d290a98cfe92e320a35fc044543a1. 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/NL6CS2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe434fd17442c053eabcd7e851c2f0f5eb24d290a98cfe92e320a35fc044543a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL6CS2400004.