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 0x6cdf329f1ec08e9bcceff7800d82d2179af23975eaf7b975c9038affc5c6b654. 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/2ecaa233-bed5-4a32-9025-20dc5cda5e28.json and https://artists.proofprofile.net/proofs/artist/2ecaa233-bed5-4a32-9025-20dc5cda5e28.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 0x526683caca9f2acb31d2d5786f26e7c2cd9d3e7ec3ef9c0096d939e596accd83. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/HUD991400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3deeff1dd6b1be1d6bf215e83ee0c74e9f9300ef3c58758ad1849fd18498b8c7. 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/HUD991400034.
Trabant 2023 (Sterbinszky X Mynea Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b3d69c5d5010255edd89f5ca271ff45b9befb478ae675feefb2b7700919249. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HUMAG2200289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ab98553148c828b1e88af3e973d36d507084f0929583ec7a49d87903b979b2. 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/FRX452192507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8b942df1db50998ca070d09da43bc2a8945a684ec20afd1ef873fe18e2cf4c. 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/FR59R2070126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11896d28f661d9341ada643c95039348bbefc7f9ebc67e541cea8e08f88e0a00. 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/FR96X1920420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c1b75933dcfb44645c0bbd6e3b42964f3038a8bc0e17693374dab9870ec5ba. 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/FR2X41950317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4557426568f9a36c548971c85f32c4356203ed29b0c5587449af055a42316c7. 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/HUB291200837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b65388258d0e6262d0b818e3a4b2c4de3d5f7a6393fb59559057daf9c1b406. 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/FRX872102155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c11cc1f8ee031d4022ed862d2532bce0c63269312268a5a9f673e103afddeba. 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/HUMAG2200183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d603b2a700843d6a47f3fba85a91684580bd9726e4209190bdbac9db274a714. 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/HUMAG1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b3d69c5d5010255edd89f5ca271ff45b9befb478ae675feefb2b7700919249. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HUMAG2200289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32659f6a7d320bdd612673ae0e9c5bc3837bb15d65860e1d733ab121affbb71a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HUMAG2200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b2e6e6179b14883d032c6790851a4e508083615240dddaacc24a702b6a4cf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HUC571410394.