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 0x31fa66f07d3ca2e8efb2b7150e2a7fddcf9e5407a21e114a24e1d561e6886c3b. 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/8b690f57-5794-45a8-a4b4-bee8fb4ba8b8.json and https://artists.proofprofile.net/proofs/artist/8b690f57-5794-45a8-a4b4-bee8fb4ba8b8.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 0x480ca4954b956c9c4ff564d34504080d82dd403707cccf2b02dfc26165d302f1. 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/AUKDT2300372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95431984c15763fde61d69d06cdb0fba97999ef1a0418f5a60867ea99e60a9. 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/AUKDT2300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8a5588048bd736a67c5392a55f8adcb8e07d3c986ea7966b1f1fc81dd51e8a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AUKDT2300929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f954212fd1530966dc486f6b21eaea8d1e1815aff5619f49f5a3a194b919f. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/AUKDT2300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4663b6400ccb68467e5c2c7038ec7c5eaf87d3279e4323a7808ee312cb406bc. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/AUKDT2300931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f542186e912e39846d9d97f056df782356d443f331e2db8fb8877ce68d63442. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/AUKDT2300932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3d4b1b342b9ac7986c9f6ccecf0b1bfc6ab1fa707c18bc92804eb9c1d30a59. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AUKDT2400514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec0ac9ff6895a5b081d7e184a8cfd26a38bf6edec6f2d03d94e8b405a3992f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUKDT2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b74200633e0e0a8aa8b079de4a8942b8965f1496e3e14d42aca9cfd5953569. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AUKDT2400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aec3bfb37204819206b97880d2a0f93d9dbba8bcf8c6ed02dd694ae1d163a5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/AUKDT2400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e0a1e623f1f7a6d089a6627a6b18665e8e05059f45771e77969675d1aea074. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/AUKDT2400153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95431984c15763fde61d69d06cdb0fba97999ef1a0418f5a60867ea99e60a9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/AUKDT2300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb453658ab3c125347793b16b41dcb1a8d80400a54e3dc83cfba8ff534baa36be. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/AUKDT2300690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95431984c15763fde61d69d06cdb0fba97999ef1a0418f5a60867ea99e60a9. 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/AUKDT2300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fec0ac9ff6895a5b081d7e184a8cfd26a38bf6edec6f2d03d94e8b405a3992f. 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/AUKDT2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199a3a51a1d393a76b9c5cf504d817c9d428a23a7b21054d5169a77c30dc06b5. 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/SE69Z2410106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5d43adf6ac3e9dc026039a6a0932dbc3273dc4fb15fe8f0cb92884734d14fa. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/AUKDT2400156.