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 0x06a3cde512eba38799fabacafe7544ad94763433f2602b9257ed6dfea62cf0a8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca1ca76d-f21e-456b-be07-118e1ba2585c.json and https://artists.proofprofile.net/proofs/artist/ca1ca76d-f21e-456b-be07-118e1ba2585c.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 0xc3e516903370f78adaa6f3ee2073576ea5a8e444719b78400aca4d96cd7d3fb4. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:01:57Z), 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/QZK6G2149171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6209ceccbabc45dfed3944bc56cc71934d37e94458f396457e234e43750dd8. 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/PLC062222194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1497cf2b90cbb40e37db1abb4ce3c7092e1fb0bda8c36c2b76967f81d05dcc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:02:47Z), 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/PLC062224183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41490816e59a45dba3a1a2e81e0dcc223d49b87ba652278b5449304e7d9b85f. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/PLC062231597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2d350d9e5dfe4de0c31089135590c12b76d3a8b6789e9901211c3f840a1149. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLC062236397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e494761adb2ca6886f5ed0d35940b87ed0652b42c3d5dff0874a9648053cdb4. 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/PLC062239915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157eee5dc36b7e2bfd84193d1a7a20f6e8ab4ca4f98c76bece31ee10f46f9e2b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:29:42Z), 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/PLC062247303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb214f473856d34e39630646d67719cf6e0c1de74ed3d9e49c4de42532ed1cae. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:42:53Z), 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/PLC062248608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1d258629d5bc33e2398b8b7c050c269418f431c3c18032f5e8717c1cd874a. 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/PLC062364832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba69fb754f9b36522dc7149c322d11d15452312982eee4d3ada9c11bc2f5872. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PL2DY2302695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc5a6d7916cb5f8b4402176b019c6247db4949702c453d15b301dfbe56668bd. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/PL2DY2302694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666d4da1f2e12fffab18cff62cc27472f7140f2028924a32865eb0ecc54c2963. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PL2DY2302692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9f8d390cbd1c553a26392e7c28d750cdee76b613e099e365eae46ae9ab4315. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:15Z), 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/PL2DY2302690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c49dd80a72c55446845f2aa444d1ffff08f728a7416ec89453a085079f29a5. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:50:50Z), 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/PL2DY2500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb350527eb01245a0d3412f54e45c79564716aeab16bdeeddbbe1cd963e3fb413. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:07:43Z), 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/PL2DY2500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b87423dac6993c27ee3e6ee4980a5b0b3c27eab46e9ce5b0d965cd1dd6712f7. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/PL2DY2500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2f7e02eae939d297ccd02f3ee4adfa3319e676b6199ba5de96bdc7c7fd82cf. 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/PL2DY2500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dd12969ae1078ab859a35d3884f4fb89f4fe6de896b5a63a047f82fbadcd7c. 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/PLI362333125.