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 0xc7e6f7e61c4bb7a724547d9726e702f3f63f282811264a7ea16d0c979dee253c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43dcb0fd-b166-4798-9fe9-c3634969f59c.json and https://artists.proofprofile.net/proofs/artist/43dcb0fd-b166-4798-9fe9-c3634969f59c.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 0x7dea233029d96fec743510a6f50a02ae1e42478d4e5089a9c150ca25e4546a81. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:19:46Z), 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/QZTPX2499489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95f5cb48bb27ff35dc53731e61e4304939cd2f281b638dd2e90124b4efa00ab. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:39:14Z), 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/QZTVM2403656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ccd2e6c4a5261b84920ae8cabbd0a3b3f7aa3e28f2a432a9f6fd8c1ee900b6. 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/BRSVB2400845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6621eff405acb4fb94a483fc3cb20e78a3e28ed5d38d4322d19a3bebb33afa7b. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BRSVB2400846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6ca8da2f6bc67eb7070698c2dc20ea07e0f5f6c49f23bf044d9e64ec283311. 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/BRSVB2401927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2e5100a481e1f9474ad587b78282935698bb8494462c090fbb0f239817f97. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BRSVB2506671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a236666fac597356bb9061e007175be8bfc25e7bc255827c9ca675f7086a909. 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/BRSVB2510679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a712e8a28392586504d58dfb3709d3a38aaa90a32c8a736fc20adbaa61c4457. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/BRSVB2510683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa717425f7e49ff6d316546d4bea6f4eb7e87f1169cded2abbcdb6c6426839e6a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BRSVB2513031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0046667d198c8c10f840eee207bc9157ba34389c9ab8ec25b54fb04345fedb6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/BRSVB2524510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c6d65fcfaa0625f7bab7d54776b7ca2967ed56fea012edc7d554a7debfdb79. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:50:16Z), 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/BRSVB2526100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9dded568d630d89b5a264c879f9b57eb648e61e769ea8eb8b75ab7fa0f9ddb. 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/BRSVB2532832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fa1dd6b2ace96409c21f1db832cb7edd27dbff60ed9aaf1b68ccedeb0aecfc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BRSVB2532834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c265d625f14aa37bed984de64dbaade4543ce86cd17bad4c0d426bcf2716f7. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/BRSVB2536273.