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 0xb1765c4a518d84771be6ff82a6d812702a4a180bdad47caec0a1c775cf17033d. 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/b80ffbcb-1030-4944-8979-679500e76cda.json and https://artists.proofprofile.net/proofs/artist/b80ffbcb-1030-4944-8979-679500e76cda.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 0x8889624786d4fd44b6c4ee100d131f430d74c3400d953a878915d51db6908410. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USCGJ1572585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4928c4ce045fcbc3d000693751acafa95fafa044f34580882d58dd627f6372d1. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/USCGJ1572588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f023a3e52e4c78aa6d99908b1323cdaba13307821cea9e0db4676491294916. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USCGJ1572591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cf88e700197248a7ea298e87d43396d824ea1b78a7afb1e57461c837d9fba3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ1572592.
In da Ghetto (feat. David Morales & The Yard Club)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889498597447b6a4aa0b251005e43e8c7efcbbfc4b20abe36f70f270925c7e9f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USCGJ1572596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dde8e7914d816d2562818b346fe271db4f1e2c535eac7319dad0dde69809e76. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USHM91942295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b86bcf44ec5b0bff4e53755388084b755cac0f675ebf020f3957bff71e0846. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM22028318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c51c1b41c91e6b3158f9d61d28cb8e48ef18e7909fc7bcaea9233868cad1f6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USCGH2357103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ebd89f3da1f7d05950296c832c050657c0d77c4715c9f29bdc2121589dfe07. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USCGH2357104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73dad0e9dc2d99682efe86abc8296d3aff816c1b349159211893761c07978af. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2357115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8677e265c5670163c9a9e729a87ccc892386e07712ed6de5c641b8280e3a27. 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/QZWFL2541483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be32334d0729668333d4cf76a37fe060149a8ae8b821be862dcbe81c515168f. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/USL4Q2576887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224cc92f8750874e103b6ae16438628b3143664e52d2e7545d32a31b85acef98. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USL4Q2576889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd252121614f0728b8267a6e02d149132844e88ed3629193011a1a469e11f35. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USL4R2577458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3247a5efcb5c2617a4cd0a471a6d45da4805efdf5185edc41cad872904be9a8c. 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/ES16G2010035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77375dfdc041765a6ab919784e4afe7eea248018299a0ed75067885dda53713. 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/FRX762071931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8d10b77890bf255136b0be9dc4e324a4de149c40715723089dfc7b9435b912. 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/GBKQU1296536.