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 0x2b6fe3c30c6d33ea0b5a9c96d25e4c6c632ac7d75cd5c05d3924fc71daf4654d. 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/c6572046-d740-4f5b-a180-084a2becd858.json and https://artists.proofprofile.net/proofs/artist/c6572046-d740-4f5b-a180-084a2becd858.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 0x6304d6795806cd29606202495bf80362cdb8f8c16fe5e5b3199006bc8df5b1ff. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USCGH0993069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23a662e8acd3622b2c787dccd6eface7080ac70f3c5c1d4a693329777cd969f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USFL41200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88f4239ec179b3205909c20429afe8169400a3d028b39bd42c2f4aea9c92dbc. 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/USFL41200706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00e6cd4d6fa3397fa4cf4a8dc0836f5ac57abe003126025d771bad270aebb13. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USFL41200709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62bd85336df35aec57fb62ec2616b29d80e91eca61e9f0a4c32cb258140db9f. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/USFL41200711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279f750f291c63dc80c65c2c3a4fb3dea1550cfb36cc5890b3d583cb5d354f6a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USQY51482584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad4bf6b4f2687a11660c6eb73e67b130f5b2aece95d439d36446057ef6f99f5. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:45:34Z), 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/USDHM1515427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d582e8835ff59cf4c8961689e6911df88f376f2d44dc6cb4f1e7ab8397475c. 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/USDHM1515428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f70bac91038115bc2a91295e7793388ec502e4af42bab8bb5b05a1d0ba1f75. 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/USDHM1515430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b94fcb01c8b20e74291ece9b78d842227ca9b8d8d4052892fac5e951943189. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USDHM1515434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a73a5261ba848b846713f3c50aaf9323414d5fa23387782b9c2a955caeee2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USDHM1515435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306115be01053f06cbadf78efddecc62cafacad480808c7d1f363a33e6cc4196. 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/USDHM1515436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b82cb795b77b3725abfd04fdc9f97804b5602ff0179995c799c05bcadd64f0. 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/USDHM1515439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f13b7a72c52c0ab2c93979a2679f4616f843a54ba6bcebf71c3e2ebfde6b1c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:21:57Z), 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/USDHM1515442.