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 0x44bccf2d097d1df741846e7bf466091a1d45540245d38b4753fb95e38882408a. 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/0eae9d1a-d9c0-4379-88e2-c21f3df78237.json and https://artists.proofprofile.net/proofs/artist/0eae9d1a-d9c0-4379-88e2-c21f3df78237.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 0xcf6156ef780452a9c4e44cb79618aed1a8b3563ce52e2fc73c01ee55d6fffcd6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBSMU7518916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651475e48e33181b244e3c7c7bd249fc8f9c75a909392e86e0a21dd562c67a5f. 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/GBSMU7518923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cef476e8dfb2a913d4fbb41fc2bf8de18c557bdc01758c2592819269f2ce9a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/GBSMU7521098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f66695b2114c9aa5d3a0fde975ad1215a7058af4e65e2514116f9836c8c59c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBSMU7521099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f764729cfb4b858c8ac27204c3d555753c408b13e629ecbd4acb0fb40eacdef. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBSMU7521100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9858746f6916818b56d223fda3e0efbf8de0bbeb748cdbf75b6a91a371706a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBSMU7521101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da5efc08fe4886e2c70d08fc76ce8d32700d984cc0656ad066bf9b4b2e62e81. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBSMU7521104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d02b2fa46def21eeafc2a5d67c2e30795b2ab1757fc58a90930cadc5e6064b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBSMU7521371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315b4be51e4d9b50a24e063242446ab636af1a582c7c575ac0c56f4b59d9b296. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/GBSMU7521372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c707afdc29b7bdaa24f074199d2dcc5ba967178aca8940ea8617659efea2d. 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/GBSMU8259112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7c9f9408e11eeb8b8cc84cfb2a59e1f8adcd2fb8c659415a5a3a3c5979b439. 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/GBSMU8259118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7690a36b8c7d8e045c85cc386f22d603b018ab5b7695a734c479ca8be622719d. 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/GBSMU8259119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1b620224509802e7d8a47787737c1b54fbb0220ec7a6a78b5e4eea52e24b76. 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/GX3HH2178071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec81b9fdacf99894595519667fc7ce06cf32cbc26af14fe3fd0b7f06995392ed. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX3HH2178072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220e0cee5ac8f0e4c6548974004a292904ef77553e46e69b9c991dd3dc463d0e. 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/GX89G2291650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7dfb97d428721ae8d34b020447b8f22d71fc121310c2d564608b724be54d9. 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/GX8LD2475486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2759736b447babd0d8c1bcb95c633c69c810e270b6e74f90e38aead9aa47febb. 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/GX8LD2438586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda7a774e1f16c1c645b6b46fc494539d513784a37e35be228acec177a3a74b3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GX8LD2427584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06aa475166a4591a67a4a92b67a8901a0a6b56a0ca8e798247b2d9ebc834a00. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/GX8LD2427503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad8923a640a8ebd60663a3348cbb6fa4ec38cfb7d07d5250421b6bafe54b4b3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX8LD2437567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a365650a431c5379233c93e7caaf896785f46f2566879f6bbb2d2b247e15189. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/NL8RL2504602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b4cba5b2597abd87474a2600cb157c0a4daa5fbefa38d7ff48a181a5312d75. 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/NL8RL2504603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e11c4812a0e8d4eb56eb4873bdbfb6e2afb3312dd71c22d8f9634e99ea3dc52. 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/NL8RL2504604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469c75d262398930f1aa40ba8f4b39793f453c816782dd821b0ac04da1358ced. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL8RL2504605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d2206947e1d6581e37ea839aac729e40acef09aed78904bd266f2c25b2d891. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/NL8RL2504606.