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 0x236e19a5ed2c636ee9a422247f4cd79d7c2a19c3f469752b85435f975d9bdb0b. 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/3b94cf66-81d8-4785-9a29-99ddef239cc5.json and https://artists.proofprofile.net/proofs/artist/3b94cf66-81d8-4785-9a29-99ddef239cc5.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 0x310d6666169b9ca9fee538639cc0933dd4fe23a153dd4bc78a752d15c247ecbe. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/DEOM41300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6152165b0d99f2a27ff23d8ebdbb460a87a5afe4796ab4e712ad7cfa58582a1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEOM41300169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ff90d345ba9bad73d37ae88cc00d37dbe35c771df645a60d4c5761f8374731. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEOM41300170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200351bb34e1cf7d9f0a25e6fb0d6dc6b036462cf8fa9a15fc1ecf34bf930acb. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DEOM41300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0578224a1a5ab42ef1671dc73c5b4f82285a9fed1daa2537870b3a54f4e4b7. 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/DEOM41300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87516379b01db7a12af5a37d432f4d0c07237f373584767196755a298b2a850a. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DEOM41300176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9958831a1b835f3ae6f06f512dbc97719cc9c8c3914d2adbccee15515b01422. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEOM41300179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbcab81e3b09fcb3e7b4c76342f07960d4bfdd36270ed103d2e83eefff8b717. 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/DEOM41600281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c796aad7c872ea6e23248a3d42fc4ba5ae68bf55ab1d67edfd5e5eef1fbcc0c. 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/DEOM41600287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fe2c2f98805fff5c953801d5c1d8fbf10b22b459c1f1e441de5b9115e50588. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEOM41600291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf490049bffdd696a53989d216fb12523bdd13deb954f8d938717d6f60e049ee. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEOM41800384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5acead034de44664bfe7bed561a82dc2efcb067c65d99f4cdc1e776c7b3ff3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DEOM41800388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfda4136179746cb5a4b928b9e141dbb0ce7d932baadb9859c7a1abe5137deb. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DEOM41800385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a996f29e73dfacaaa766382fdb6334ce83ab724bafdc7f9bc5535a338cf12ad. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DEOM41800386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9af937ed670fb0fe144ce9ab7deb40c7e637defd10eff4879272d07ca50c7e. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/DEOM41800389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ba18b6778944f4e5f86b0a148ce1405caf63afe91498746abc374161b0e705. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEOM41800383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672621cb04ff533b4f5bce506c7dddb1efbdabe90f1d489ffee0acfcc46dd2e0. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/DEOM41800390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7552d3ade685a9c78343d7c52490a2c244a7bd2319525f46135e8df5ca0d1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEOM42200664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7814088bf2531cd9473e5f7ee944a73f7c0db194be7430e837633943729b6a19. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEOM42200652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28af5070f60512d311ecc3db74e547cbace375ff33d748316868b7c17697c4d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/DEOM42200653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c786d6b2df426315e5e07c00aafdf06d5053d7f4158ecb247fb85f6f48fead. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/DEOM42200655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79c17d82824c7ff84b4d7b3b57e9616b2eaa85508333e93d3efd3d03624e1dd. 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/DEOM42200657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edaa669e6ebdaeca2b73103d222ec9d046ef1872dcfa397aa3c83c8819ea2f4. 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/DEOM42200658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08aa47a339e7c2680ca8f5915323dcbdf651952c10749c098aa2cb6060ac7de. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEOM42200661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93f3455bfd3b15e795a0e0792fdd0df42809e123c5edb046dfd80f534535f53. 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/DEOM42400667.