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 0xc6dc14ec70127cab5522b363d8ed0b46d1ce07a64768c695d6bb66dbaf71753d. 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/5b8ca7e3-e24a-472f-a452-d1f73bd8798a.json and https://artists.proofprofile.net/proofs/artist/5b8ca7e3-e24a-472f-a452-d1f73bd8798a.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 0x73aa22a04dc1f7dabe0f275cdd15710f85cab2a51e6736733b0fb80762461da3. 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/QZTGW2402191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3b43b66993aacc4fe15607c13dc442627879daca48930fd3d76ea5b923a87c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLD91736036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dcbdc8136ba2e664474eeafaa6bf019b7095354047854714a86959aad83981. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA62237275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37aa849a8fe846164806966dfb7709dd301ffe1e0301cd1e29c67174b488c3d. 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/QZDA62237271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c56b91d0660a5fabcc0ea8b50949bf5025c551fa84beba913117daab54f6baa. 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/QZMEN2179942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3b43b66993aacc4fe15607c13dc442627879daca48930fd3d76ea5b923a87c. 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/USLD91736036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea2aab9e61ea6b5c795810ad6c063547ad3a65173beb80f22deb122396ec573. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKPL2031177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99432e0c0a8cbbab7552e5d86653e0e7f3785022873bf6da21b53eda57084c00. 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/USAT22212630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab64f6af12c448e836f258f63334eca280ada059f0d818f4703a493cdda24511. 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/USA2P2252569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70db0e773c492a2132ee10c0820fc6869cbc5514a5a495fcff69a04390a547f0. 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/QMKSC1901350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0018988ede28ac09422b24862aed4ea6262dda6e90f9bef24242721d65502663. 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/QMKSC1901269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6936b0bfaf5c6977ed6748b02f89fedc9e212de5deb0793721201b022cf5b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMKSC1901270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e534cdbde06db09e99806ca7d419a67bb7ff6ba2df3a1ea0c258dad521b382. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMKSC1901271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d97ef67ca2b1b2f7a47fed90427edc5ac7298f4d0c8a5006012cb9f8fcb56cc. 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/QMKSC1901272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a835d2144dffb3db4e14e85bc58d74e349a8aa3b050bb06da8892f396567d4. 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/QMKSC1901273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61b41bb1f51e66f7c3fe5850e3c0e56de6bdb1e21382cfde14ab7a86394d4c7. 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/QMKSC1901274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516deb480fed33adf5c9bb937bacdda3721cca9c80dc03aeea17602627947767. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMKSC1901275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6516e32fbc218ed36157f7088239a4d6b7f20841e3a9850bae069e99b9706e8f. 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/QMKSC1901276.