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 0x544471fbc3b31427df530213c7122081ae2fc116fb7bd13b9f2583ccf124388c. 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/60683f6d-b38b-4e66-9be0-2ac7d6db0c95.json and https://artists.proofprofile.net/proofs/artist/60683f6d-b38b-4e66-9be0-2ac7d6db0c95.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 0xcd313cafef0b255b30be59518ecc07bfb5dabcf24e5f2741da04516f9cde7246. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEVU51734499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9373d3a5cca4ab15a4f6d08512c4a980efea4b8fde2fa32b370db90a3b38605. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEVU51734500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dbcb0ed9060d6c65c23a8f8251eba00b0e8c9bf4587b202dd6119bf0144502. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEVU51734501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae663905281022ac83bd6aef319540bace4c76a5a65211d16ac64cce94fc73b7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEVU51734502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf31b2bf3fda7b4540fe43f71749a09640d7e4a1662872a4fa76ff7d21aeeb7e. 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/DEVU51734503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0339f2a3a5e8c98ca0e9fb547187d5b6233958bc58d1dae2efaca75c1af332a5. 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/DEVU51734504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cd30acbf3f183c033e5c416491c1c02aa73ce7e12e259b51595727c0eb17a0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEVU51734505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381621a35e2d405aefe86c25c28cb6c0547fa71fbbb3f032b2f267c8dc435b5b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEVU51734506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8304c5601401fa531b2a14b827101b8a31d636eb3ac81e987ad993c3c213e04. 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/DEVU51734507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa386b49eefa50c3746369d499c5f14f6afe47b96bc3099c9e9bd83752a4af758. 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/DEVU51734508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c6ce2a9a4e027e4b3aa68e0a04974b139ae5015e9579e93812530fe6762908. 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/DEVU51734509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c394c5c6a366af63d73fc57b6f839c032e7770e6def122599142dc038e756f1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEVU51734510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf420081376610ccef4470d0aee079c8f823cbce7eea0a74099caf20f76f8af5d. 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/DEVU51734511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea57d5e8971ec5e1e663788c0f96b23b18dfd689c9db33ec95f67b4bfd2b1a. 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/DEVU51734512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284ca3f4bde6a91195ab314560dab3abb65552e5e89fb0a1363d00c7116fd1e8. 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/DEVU51734513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21937153520482115287382ce1bd11f9469f81cd619badbf7632b579f4a4c6f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEVU51734514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0831c2453879f1ad3baa0335b85196cf29cb8b06731b815619e20ced715005cd. 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/DEVU51734515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c2f3e9c694367640a21c2575b57b8c1d479b504b1f4a5c893c271f59c22562. 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/DEVU51734516.
Natural Landscape with Bird Noises (Forest)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a63e711eba2149b27fda0a44c329b7200aebfdcca8d80dfc39c70b2f093dcd. 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/DEVU51734517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51aff3ef50f08d8910f1dff5d0df093bb1f9b7e07b18a1234a178418a25c95a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEVU51734518.