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 0xabdb7718c4ec7df2fa4b2baefbc428b3f163144684c5fcb4fab8bad307e122b4. 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/48970565-f6e2-44c7-948d-fc92b57da100.json and https://artists.proofprofile.net/proofs/artist/48970565-f6e2-44c7-948d-fc92b57da100.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 0xe4c8597aebed024f76d02e05eb5b6cb0c51c0aea1c8503aa38132e4403c5386d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBRKQ2595430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d870fc6c17ceff75930f231674ce3d5e50c3e7069c25df150c0329581b33211. 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/GBRKQ2595432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad142fc358eba4b7078a78e1640e35279b5385dc6c71b865532afd0381d9ff4. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBRKQ2595433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e77dc08fe7672dcd23d97ce340965671a50d31329cb1368a110c3af664e3d0. 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/GBRKQ2595435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef1a70960e4defb47ca11764dd83674609c53419d460448a2e708e677600734. 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/GBRKQ2595436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6721569a51a85ef7009fe250784aa004589cb8bafad65b1ebd8abb36142919c. 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/GBRKQ2595439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e9af9afbe7d5a6ab86f5a8c9383823f269f830d7284976d668a08288526a5c. 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/GBRKQ2595440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4625ccb3c765da0ff14e0b724e72434f0e68b24d5ca282fe10e22c23553d95f7. 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/GBRKQ2595443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd842a955b38793f9904682a1401599df21cc7dde437ddfe4e5e140a543cf1ec3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBRKQ2595446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb364f12ece2b49ec4c0ab3e4c38a70a0a8c31da0f4aada791e906fb34dde37. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTV32550153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd863d0ec712dc8b26811430a5d434f29a1468b9ba2d6207fb8c7b4b688498ccf. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTV32550204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcb532d527a2b312433fd123441a940e44c3f3aef426916bb6e9944182314c5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTV32550556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f81a3166319e97181b9589b4014004fe0d853feb2d934a829d5df33e9e81bb. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTV32550593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75651b494d03ec88c5729492bfd0437c7a6c20803238855b2847698ea5f12c47. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTV32550625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54baac6043cfc4f14ccf9e98c1e0c04535ad6999f5e493b90b98f2e5f7220cbf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZTV32550658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c92fc6f98103c0265db7c4b01fec2cb0e68ef982e60ea26c64856cdaa5e99ef. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTV32550725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace1dbee261c50867e9d428adaf6e6e6a66a55094059d530203f1f1ae01867b8. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTV32550767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8e81addb993b796ce67a65b5ab50327036159b7d1f37490eabdbd7716c677d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTV32550798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffe5c2429b9fb00dab04d28cba0d229f000324ff4ac92505a0db97c8d328509. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTV32550882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fc72a6938ebec659e117062437b7f6da7c12fa676be53fbd014ee31d36815d. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTV32550951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0907ac007d69f12930a9636118f74a638e957d87a2645d314f0fc10f2aa35a6f. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTV32550993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea209d90afd6695e075a84dd7963601224a50bad22d92cac276537c68a2c4e4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTV32551065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a1b5a96cfcfd069aceefa3fa71f0873bd851578e24319293f84c5f856a56d5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTV32551299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4318086ef9e9e757ebe799ff19907878985de878935e61d139b736cf0c98f1d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTV32551495.