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 0xd2e4f351ecfe1d03b87eae3ce008c09077d36af544d4d8df1e179f44dfc6915a. 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/0ac4b3ef-bf1c-4729-9ae6-6b5413f6d6d0.json and https://artists.proofprofile.net/proofs/artist/0ac4b3ef-bf1c-4729-9ae6-6b5413f6d6d0.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 0x2290d1b368b8f3356e82fcc00e8d993114a3c1367cf132c054553ad4fe5609c0. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T03:03:44Z), 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/QZDA62280971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1cf83675a5526e99501bf6284ac0bb94453cf73ca5d9021f3fe7abb005d270. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN92232937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3f35c54e43490baab1ed639f2c1a28550e974a83cb45d5496b7f3c061728a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZHN92232938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8508698965def3402d1c853983740d8d627fb2a771c92c0cbd9a545554c773e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN92232939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeebe25efff162d1a2cac515481b1ea45bba8234607cd9f38c8d93061a0c4a7. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZHN92232940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445f9395997108e1697529efbe7adf4196312abddd276842e409c2dadaac58d5. 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/QZHN52248122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58137817faf181c3893e7ba3270a3d29a1f6a868c3f33ca651d8a4422e23a308. 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/QZHN92232941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0f8083d21ba27baa410a6101ac193c200e33948f17583e521c025c2d50428c. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZHN92232942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c85dfb9e29465acf6aa7378ec9710d4b1ed7d12c615e700f765eb266c947654. 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/QZFYY2342002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fdcfa0a7644e9dd7cb75b6527b916a5ea6694fca56add2f3da2e73fbae0fca. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QZK6N2307486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff1bc905951d622225ee5c9c3a1b87656ec8c0d00a54fd50bf6c4d297f46155. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:43Z), 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/QZK6G2398295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0fb2f656e68484c4afbd9e0f8124bb9a0d855b76bbd6c8bd5b44ad229a2d90. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:12:50Z), 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/QZK6G2398296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5062749deed0243693e8c4b706e9f01191ce82d66ae6b3b107de3018d85095a4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6G2398297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fdcfa0a7644e9dd7cb75b6527b916a5ea6694fca56add2f3da2e73fbae0fca. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZK6N2307486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea7b5fa2a98eb0db0c80ab3b7a5b855365651ad783faf3ca44eb8498db57a08. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ62417739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6d3432d68435fd0e21db54a7db1c4b26ba80a921ef1ca27e583699b3c77cd7. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ62417740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2f96a11589c20d438d9a84c1109ff7effcecaeb6f344e34e334d21122010a. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/FRR642500367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0987ef2db54c3ec2e72da3ea9892d4001f490d800bd889d97fe54125c171a373. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRR642500539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fff1c89d16a675280523e498cafa39525dfe26abc2b457582a000665158f0c6. 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/FRR642500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8205e431c2b13278875eac03181f6a274222d6ac3f087b0c0de3417e7aa620. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FRR642500541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0151cb7654390a1ab0890be46666d92e9b8c57c56a050fb39e5ed89dc7d75b1. 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/QZNWW2090508.