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 0x938d49c6dcd94d4bf672d9b37e544920b8b828614551632f92dbc0764c2355fb. 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/848b81cd-e747-4c3f-8b90-147e96e84f72.json and https://artists.proofprofile.net/proofs/artist/848b81cd-e747-4c3f-8b90-147e96e84f72.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 0x107054ca3943fb69c09bdb80e0b0234953bfb26ef5b07b33196867290b56ec71. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CH7961300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8fd18f9defedee282fb034af3797cf5886a230784ab139e99e75e40e2278d5. 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/GRRE12300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2485413ae3e7d8d0dd68c2c1edbf7805dc48007fc2b328c0972b9f588fd08d3f. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/GRRE12400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9141f2c7fb6731c7c3eb44d477c0198f2dcda4ddca471bae05432fa9a9e9dffb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GRRE12400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdd7568ee170e5f1432ceaa88e040ac2979051494e2b479960a79e0752d7a0b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GRRE12400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318c708e94e733ae75dc5a0b1df6a300c8822bfad9ec1757074dca24b5215e32. 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/GRRE12400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc8f49524cb811dbc971aae1b550e3edf7a32b62595604d7a1bceb1238c12ac. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLCK42415342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43433d4f8ec40db54d9d76fb40036d5f926c85e78b68c3380e04dcbca196aa7. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/NLCK42422262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3faa4b6e1cb6c8dede29231e0ff9005be161d8d09aa0daddff4a72428691b4. 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/GRRE12500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ceb3bb1c7e89acb18c6cf282424dcbe09c7fc354a1b1385b535f305ac0c7f8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GRRE12500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ab2e5dd22e58cce797c483944270b8c3ba8ba26cbc9ec55be5708e3a0d807d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GRRE12500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57a24f8bc7b29b3657e899dd2025071c7589401004a8d765bda586025e4d35d. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/GRRE12500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf90389aa4c2c27ced51f343fbf26b7dc5f639ee5f1ff0e24f4e9199265b094. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GRRE12500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ef55e0ccc930fdfc23febfcb838205fa4637b2530d625970d70635731943a7. 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/GRRE12500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4835f83b86b9996476c7a6068d2ae819daed1a8c801865c1716e12211c42cd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GRRE12500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51987277893b63450b9005ee302ee01f29b1b2ef28e4897b1bf7d007df37b069. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QM6MZ2581500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dab6ae5d03791869900f3168810c6f71b4374b2ff8d27aa2555f61ab7f427e8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6MZ2581501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e279272e7f0ec4241f072f97499f260c10b0497a43fed6d5f810a9050011df6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6MZ2581502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27899aa2e054a980e1881970efd651066f25c12d6c4102b30fe733c2c79cbf49. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QM6MZ2581503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee3cb696870d8f2fe7c057728cd5ef9a4bf4b805654bdc7d60bcfeaabba85e0. 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/GRRE12500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0522488daa0a89d1fb465f9517323aea12f8325e0e7a8cd27cf2c96907afb0f8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GRRE12500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc430c7cb41304a180bd8320ceb4e379c3b9df2b398f497cf552d81d345f17945. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GRRE12500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72849c0ab70024783f7d3252968b19c43c834cee9099ebdf99347441bf4a83c0. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/GRRE12500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5869805ec9fdc14a729db750c6889abdc8f5b6560d3deb87f877d0c8cb1f6fd. 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/DEH742225005.