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 0xf8df51f61165a175680c1f991120d74dd12486a07ca18e900218474ec894e386. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b96dcf4-378e-4b28-bfa8-ff44eef4648f.json and https://artists.proofprofile.net/proofs/artist/7b96dcf4-378e-4b28-bfa8-ff44eef4648f.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 0xa93b8d89a3d0e62f4fb78f465dbb7371e44fd9902819a1d9d32e61a5afd34e3e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZAPG1897675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d3d4fd117fc0d879d735eba595ab3932e1bfd690f96a9e8d011939079cc343. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZAPG1897678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f2e1a4be2d04c28b314cbd53d3bbf192a6ebaa71868bf0906a2886ef9d4e57. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZAPG1897679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3af5819160996436e5cef2d6ddb15f599cf0d4887ce07bdfcb3742d0dd1679. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZAPG1897683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bec29a5f02312ebdf69314797c65501dc534dd10885dc27fe35a4f8f6fcf30. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAPG1897684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41991b3d33d9cff60a9bb89f872713a43df8ab476f8a0ba8d717506ca436f969. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZAPG1897676.
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 0xc87cb2db9ea3eb778e7b6c53ba533b11902d17f2aedf3c6810daa0fbb809d567. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZAPG1897677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb77ed3b02fb32ca870add22c9756ee357346c4441dac8d94f89945ed66fc8b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZAPG1897680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f3992ffa0a4c8c9eea35a3775e47457d63711fa94b2713488fe8052c771a19. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZAPG1897681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaea64c4e783ebdbf9416094b6d834140d3550481cf473d23cd05b96842d01e. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZAPG1897682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8475d5a4f8c671ac8e738423d614ce10fc91213cc60a9cac6e426246f72eb00e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZAPG1897685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d83a209a1e2b0691115f7cdf4e4d99cfcec7619ffed860230ab3e9f25d125e8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZAPG1897686.
Rest in Peace (Firme Memories) [feat. Toker]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f2867f319b20288fd865a2f2ec3618a49a2c318f2c335db5a409a21e7e4a6b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZAPG1897687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7772c8854e72c9de8f8c0632e2e8954a3d7ceb1453bec7c2fe3f7fb753381f64. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZAPG1897688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd30cdcdbe166cf771c02e07ea1c26fd61c6265a27725c82cb20c93898df175f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAHW2439058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a7807f160d374f4d3623d127358ff30d9c8ee2714c241c4181dfcb956b39d0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92495397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f318dc3d579b756608b6d13d26ce9e2b26869c85912f35372ec134e4bdbeb5. 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/QMDA62402208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271fe894beeccc1ab83c4b7ac010f109248cc5df06a1b7d0d1972a52b9bc81f5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMDA62402211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9344a35f5864779e0f025bbd5dcc4f3456c928139b33134b3826ef0406dae58. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMDA62402209.