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 0xffb7622ad2a50d1987097ee49c3d9ec9fa6d3dd5f76c8c55f801430fda5be5ed. 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/51d15ef4-f69d-40b7-8b86-a9773fc38eae.json and https://artists.proofprofile.net/proofs/artist/51d15ef4-f69d-40b7-8b86-a9773fc38eae.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 0x089e24e8a8d97c365d2c8ad6f55b17c15d6a8bae894e650c38f50660a822ebf0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRWNK0800468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4699b77db384c4ed2fa06d1ffff362c57fd823bdf57fc813ac41a0c55dba3ad1. 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/BRWNK0800472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4391d39275aa7dbd1ca7b84d96b74c9589d5b673cd3a35f4544fc6006d1cfc3d. 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/DEYX82221859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5406dec1cf4349989f7c09956de0885511a706312836bbe81b6cff9bf0bcf7ca. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEYX82221854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab598e3c0298c81538cef136ca3cf1514828df7b3acd707c160c5199a5d560f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEYX82221659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209cfad915c5083c1f82cc8d100887499cf61452d92591e2795268aa0a363e8e. 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/DEYX82221658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728c74ad9c33c825da9356f3f91b4ca01b64cac0ebdcef41026d43d19b72e934. 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/BRC4M1902349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889c2fe7ca1264831e06ed25e356345fd6199e0d47207e7b410ac6b81f4e4d77. 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/BRC4M1902351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff86d8e9bd6a6804f7d23e90ad2341ba72cfc70b4699c6e0cac767c0f869ec37. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRC4M1902353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e71f09246f540b7f38b7eb2fb1624f656087919413f10a80825a8dc1668e6. 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/BRC4M1902354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee6728f9e9ffc128277393ab82bf80ecaa5754867a67aa606e29dc0b481831e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/BRC4M1902355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70dbce5e371da47b99cd8c1c40b7dd17406f2c7274ce74f6ebd4042d072fee8. 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/BRC4M1902357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903648cfa5c23555937828216aaafcd40f1102f180db3c70ca14e1350ec47f1e. 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/BRNYC2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd7dc37166738bba5df14a6db5cf66c5864ae6f266fa9def2528b4bfd23b6bc. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/BRNYC2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3482cff1ef58fc2946aa68ddd2d4d377859d62c2ac50da60a8a590a12ab0a0. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/BRNYC2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd6f8d858c5acc2cc98517cd498df8cdcdf538ac6b39d9792f57ca789b04df7. 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/BRNYC2300044.