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 0x54edb9d1c2a30236bbda4ee238b823158e16cfff52ac4273014dd3e15ae96084. 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/082e18ef-c06e-4aca-a788-3dfe36068841.json and https://artists.proofprofile.net/proofs/artist/082e18ef-c06e-4aca-a788-3dfe36068841.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 0x6471443c6562ca067617b2af14b73f5e7d510a6cf27e9cd38dfcac8bf9491744. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:22:18Z), 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/QZDQH1819427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1446d3991b45a401d6ead14cb6cd7e074b8469d1dcfc00db2423946e1707abac. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZDQH1815848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fab6ece2e3125a0d7790f2f7ffa12622b7933593704981e8e8b4cec061c0eb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDQH1815860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8750755f5c6c2cda1daf4a6b612a4fbdb895f0d81a34d427831d00785239cdf6. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZDQH1819295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8f75a0b4dee6ecc83cbcfb284c9033b961099bd151ba7eec61b63b6494826e. 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/QZDQH1819299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef875a24611be03dbaebe2df5cdb429959023917212b158e82b238485e327cc. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZDQH1819304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf44907e7f331600dc406656e02960878a3304bf33973fb4eb663e461fcee88. 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/QZDQH1813961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59399d9c38079352eaa8eb0caf05898f20365c6eec06cd9502beb857b59dc49. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDQH1813975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8059c629546b29b60d411dddf7e03f338e530a41c583f011ab79d7f0b1b8eef0. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZDQH1819394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363c86c4aeb32f8c9cd582761abd7468d2312563e83380825f059862b415df40. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDQH1819395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc793e7fda4a17cea309a42d57d0e9c115e857c5cee409cf4f119f6a9e9b1920. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZDQH1819396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62c708904ee2022b3f9d3cf0e8587ea189a6e821f460485852375a9435681cd. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDQH1819398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d77d43e2e8498b22abee7c1b308075b2c64a214abb7251fd230640927c178ea. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDQH1819399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306ecd6bb174bebd497b0c0ccdf6c4fcb9f33f1e6137d1118ad6dc1a921f2bd3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH1819401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a587c8364275574e4d5aa801b19672e6cbcf8c4f5b0e1c25f5623f395954a6. 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/QZDQH1819403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad21f1dd0d366e5be6b0d0c7cb000530ccedb008ddf0f88369d17559ccac6fb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:38Z), 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/QZDQH1815862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f4afe297215caf8c905054e2fb5e2ba240df30b5d3e577ce357b1b68daf6e3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDQH1815866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa62930747030984db1166a6386f63d36bf762854c255ff54f9add65f8b9f8d8. 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/QZDQH1819371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0dba11794d6b7648b8008860f6403dab84937e22d8ac7cc9f94e9df5f3be14. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:52:39Z), 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/QZDQH1815894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7badeebe7d13095020450d27bc6e4dbfc69fa971bd22ff9a9b2979284aa88414. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDQH1813983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0db58432ce7ff9ef1b94ddafe8f27cd77cf6c8bd1fe9691972a50a27220f3d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:06:46Z), 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/QZDQH1813998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6ab1bf1e931fd3ccd0d728cec5fb181f3e6b43f78c63207309be84d55e391d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:39:06Z), 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/QZDQH1820074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3f00240db126ae4edbfbaffdf62c02ddc1ae7bad107d640ad75021e5b5b6cb. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZDQH1815825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1994b5ea016185c7a930dd7b6c123a07ab6e00be95223d00ff9e22c43ad39a72. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZDQH1815829.