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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c900c1db5f1cfb62b508774d4fefad2266ebca7920cdbacedef68b041a892. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5746b8c-3552-4c4c-be4d-d609e6569f40.json and https://artists.proofprofile.net/proofs/artist/f5746b8c-3552-4c4c-be4d-d609e6569f40.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e6929ecb33d860152459418c098fde57830dd16632a223c927e7e1190368f2. 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/NLRD52253237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85bd0cd3b36af992886401ac24fff0cadef161c426ae62d965ef82575f477b4. 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/BCE7P2400835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd393f29061e94ae90dbd2f7f34966f014d78904d85c239d3221970b37bc0946b. 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/QZNJZ2429640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d64157b4d82fddd2ffe5e4672323d22272d68306678462176d4913c6cdbf3bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXD7V2266010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c8963f1147137dc8d10e644a2b960ab492f86b10afcce8a62e098dd230a92f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GXD7V2206941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053f895c97b20cf7a72263b48b8dbfc45bff9576ed3de56e1b6a43f6af4e2584. 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/QZTV32466858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb342553ed1e7bfd1cc931056f89db57948d7e8fedd5a8434626a8c295c6f5b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTV32417882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b99ef5958d68f6cf09af540644a4585c0fd1363027d5729720da89e0913604. 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/USLZJ2487151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf541e8101d3aa6c1a1a91d16ea4875726d77682a2a36a1146994e617ff39c1a1. 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/USLZJ2487152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2aa6111c3f23aa519e16aaa811f075856d535c23fa3e734e80c7311163bb4e8. 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/GXBAV2421552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8501e5cdb8ca248008ce86abd62b65dc4e09aa84963c138b3951de9ec5e7701f. 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/GXBAV2421553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dd73e741f502c404881ef6972dd11decfa286b0da05a9911e36ab2c80d3064. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ5FN2437197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d63d2461da2446c2eae126526d85aabd8da7ebd657d3741c4a985b25273e3b. 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/BRUDN2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f90c65fd42dc8a0151175612e1af71a13db8abfb5a74fdb17c77b01a58163cf. 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/BX0BA2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d761775f3bfc21f9b658d923529a026dc3e20cc49a21d5117e257e39a05dc. 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/BCA2A2300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd716a2412447b40b0d0fd7e2731d54f9e3a0ebc0ddc2012769c2129475f7684. 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/BX4IU2306623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d59f44ec3d847da2637c9b529252c7299e158258b61853493dc89256e3ded2c. 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/BX4IU2306621.