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 0xa78a7f94e4716592085291c7aa86dd1ab4b5479f332d31c12e59504f35f3f3f6. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2686fd6b-e307-4d1c-8223-9f3998065e25.json and https://artists.proofprofile.net/proofs/artist/2686fd6b-e307-4d1c-8223-9f3998065e25.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 0xbdb4a093af1642f15d52924947a48e8473aa57d2e154f34e46e0d5bbeb76fd14. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/BKTHD2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258ca054ce6cb8891abdba8c12f79e278be45a13da509b8a2f030016a8792f21. 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/BKTHD2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f541b92d3c96610fc11798f98e26bd1c98b0ea7dc0d0d73e0df89c3a21eb5f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BKTHD2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44106e2dd0ac9e8b1a52cce93aa04ef2047318e2adfcb39295c370129163f67f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKTHD2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc080709aae698f8e43115de0e3d1a2d56058c594491e04a312ebf0cad009365. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BKTHD2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dca19caf767170498f9ee7f7faa91fd0291a835583ebaa2c757f884a884d84. 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/BKTHD2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d5e30b911e895c2bad446a09da5da9fbc6b9731712042b2b3e838f408c6353. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BKTHD2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19368ffc0af5351b5c287bab7d2cc6c13c6e446a3e97a3a99bf0f9a49a581a3. 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/BKTHD2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306af5310967d290a6d839583bd9a80e99d75839a020dcf554cecf13e4532d83. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/BKTHD2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab79092e520005cd7768a51260e1e5c0880cfa95c96bcf167a97504d604de54. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKTHD2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920d533f6c59aa63067e8fb40f673f15545d8d3ef8589b02127fd41869f0963c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BKTHD2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006f2a875b7b90144cc343b207cb89cf29e3aedf2909f3e370d9fc26682377eb. 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/BKTHD2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a3baeebf2916243329f04449ad58cc3a68783fc64be8e9b649f7e24af9679f. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BKTHD2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da4e5687f1fb7898da4076787479fea67ac478d45ed41932be5436bc4d5b4bd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BKTHD2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad2ce4d0e9ca467ba8b37f4f0e618b6fa4d6f840f87b7bad759b67d91647e3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BKTHD2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230c82bc176ae7de067a2ba6a0894825af02c4bf5afab8db9bd2d3c4ea12671f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BKTHD2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82668c375dfd8685ede7d0d1dce78f508195c588dc508e99f186acf52ec6304. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BKTHD2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e799150451a3c2c1086c391fd087a6afa2740c556dc7b46b8aad82ecbcea76. 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/BKTHD2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b91aaa2b65ef0c52d9a73b4233bb07950df54fd9a37193f368c54e0553782a2. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BKTHD2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74084a7869f7ab82099d49e09ef05188e89b4b22ea465033acc760f1c646f863. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKTHD2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646bbce71e96251b1908fb15d1eb87743d1598504cf1a38b674878acce79376f. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BKTHD2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ee288a282df49b3db73f37d9ce0129c63d9a3f42c1af9fa51ccf117c01bef2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BKTHD2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b36239d4440ab41a9acc767388c6973743e7979d7df46db17332df674b48e1. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BKTHD2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e5f1dd2a1d1e244abce4fce10a9e00a81566712f075aa31835a23f9229790a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BKTHD2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4d33412d08ee5e84046443a97e2a01419589485584861e99ffb247e8ea3bd6. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BKTHD2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe7eb1c32efa022b4068f6ef4937ae46ac2863134f03703a4b697ea85bfecf5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BKTHD2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec62313df74daea9c03140b6b93fbe42e097fa08b59ead2c25d4e6fd43dd4c36. 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/BKTHD2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb4ba0a91e42365f8cfde0790a5f960fdbf4f415cb3f382f77db8dd1bb78183. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BKTHD2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd113e52bbb24a02e1dd40975a4bac6691a42d85ed1b966dd59033682376dc264. 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/BKTHD2200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f9b74cedcf55c72b131be6596bdbd622c149640cd1249c834c416df2fa96fd. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BKTHD2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fddb5bd406ff3bfb83d8088f6bfa1e3506999edcc0401e0bfe2673d6a157a3f. 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/BKTHD2200027.