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 0xd96bc01f629285e61cc642b2061aa41f1bf225535c407f8e7bba5b11eb5983e2. 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/e55ab312-f4c7-44b4-b8b3-1bc712d6d93d.json and https://artists.proofprofile.net/proofs/artist/e55ab312-f4c7-44b4-b8b3-1bc712d6d93d.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 0x1ba8e53510c51227f607e32374dce7442d94f6339dbe903a676d315411208bb2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZAM01701272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ba2042f43a4a6e459e5ea07ebeb1d2f67f303fc0c3c2abcb36900b74444328. 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/NZAM01600623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ba307d53df6c27d8a4478d923b092595e898b50bbba6fe1766e30cf4298529. 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/NZPB12400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91983af6e8370c3c358e7e90a242729b3d33826f5f58ad427ed6cdf22a01f78. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NZPB12303405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92017a6ff274d05a5b713dd9e77d3c24829d97dbff5eaeb0fd01abd65baaf66. 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/NZPB12300487.
Red, White & Brass (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c63c99af26d7b7ddc030b43982486fb88eb459e69fe0c4647db6d7e71e5794. 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/NZPB12203814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63ffb587778e27c3c4e48b1aa67f648ea02edff76b6f700f1f0dd60bebe376a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZAM01700923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336e7467a9271fbe0cbb43967fd324939787226f155fd02166c7779859f06124. 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/NZIL01400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51895467b1c92f3a576c651e8b14626218d0104b3fcb4706fbc7a128c9619529. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NZDR01300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cf9d56f063c960a135bdd3f6ec3595e6d6e372b81b1a07feb24054f1c50a8f. 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/USHM21236402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc540aca03a75b30d40784b3aa7b9d22f2860fe3466f599b5741ab3f79bd7f2d8. 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/NZAP00700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c39ea68ada412b52e73c7a9dd261dfd90a8d371cdc648c5b7b79f2fa5def8b. 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/NZAP00700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263a7bd2fc2e57788892f24cf8215e283c64a003eab55b8e5751faf6746e4743. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NZAP00700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c0a670d10696826df60a39adb2570f7f4cfccba0268c46357cd5b8a92c0870. 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/NZAP00700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d0226c24b7ba7ca74c723bb2dfd3cb6a7618366ce3a4588f887205d6a80ba0. 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/NZPB12501693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a6acc51f4f6f2ae9f1caea1d2aeee1c5baedf8d820dd0543e4389783a614a4. 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/NZPB12403750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb6d4c0a9b2e504b982435ea264449dfe3f4de3b6353ddb016959cf002833fe. 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/NZPB12401411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cda09fb7e0397ab0cb836af81346688073781c0faf25f40759e706b6f16ae87. 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/NZRI12300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1be9fbbe1b3da1d3e3fe62e90135a18ababbe9576481477250434b205239d6. 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/NZSG01900027.