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 0x266caa32f2d69d4bc45c140a581c51345cca40a073bf8d7e54a8e94568be77a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a80503f8-15c9-45e5-989a-1fa808b6489e.json and https://artists.proofprofile.net/proofs/artist/a80503f8-15c9-45e5-989a-1fa808b6489e.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 0x09ddc7cdc22615b915163a0d703270467354db1b493c65ec21c01eaebb3e08e1. 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/QZWV32395123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8696c781be3951068354b9f09dd1c7869c9b6fc4c3a7cdd06e2a2f4d7bca393d. 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/QZWV32395120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd4ba4486c7edd513975db5e2574ab8e1e26a8fe4bc4fa4b1d2a7bcd1a4b6a1. 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/QZWV32395059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e033d0f8bcdd8107aaf162a6903630eaca7a70f5852656b4f1f04d96f1df7bc. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZWV32395121.
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
I Go Where You Go (Home for the Holidays)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5397974b47d79b3085b2ce965be446722f5bfaf991ee387a5f3f9f0765cbc3c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTRX2444992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46daf606efec4445128696965742e3e24948fc9357a11ac291a5e9befb2aad2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTV32456385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3f9cd075ab9bb247f7b40ce7608bdc22f8eb2392efe71ac0064592192575c2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBWUL2432456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee5545b61554e1e436e6626df25071a631f3c330002323c296c3d6122cd1b3b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMBZ92326727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599dcc458f69a687b542713662c67226cd30418f81039fbf8d444c7e049450db. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMFMG2371266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe484bf9af9ed4d78311e8f914a5d0c3b8a1371b9e66e28479cd800864df1e178. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZEC2473023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff50ca7d6b27c089e481682315fa3ba6466be1733fdb8e90978dad39094b4488. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBGLW2000852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0702a60f7d1798855c7161de6a048c9e4096cc44d3c200ade9efe3897a4f9d2f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBGLW2000853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3165f281cb48cc0ae5d0a9d81ed8479c8d43a6608fe599ce8f885e4e8a2d76f5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USLZJ2599788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462dc3c401e31b9aa7fde36e1d42cd7529645e4a12b3d022d1bd562e7808a073. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBWUL2571568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4989b18868dd0e1b6fcf645e66e3a9483aca45642459536b9ff1134523db8876. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:53:49Z), 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/QZWDD2598023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44748b36bb2b0a1d984aff6b245ad64ed6076094fc2599c15c3d9e7f00596590. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWDE2539332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a94fb4cdc148ad81a1daad15f9ccec03c69f41fa82ad275cf58f56f9afa6c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWV32519736.