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 0x49c140b400172cde933fd56ee9844e89277850d7725b3281d683b28d41269b45. 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/2e9d865b-55ba-4377-a0af-5e9f2a2d10a2.json and https://artists.proofprofile.net/proofs/artist/2e9d865b-55ba-4377-a0af-5e9f2a2d10a2.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 0x9070b06213774c272c146e688f030908d24091327d1c460fa35884f4b2104ea3. 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/CANT41700056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772da42426a282dc4272898f8dda7422e2a52f309c45789a7dbeaced07342810. 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/CANT41600046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bcd622e71c1c1f25c849993ebe4a0a1a711d6bb027a55a549ee27903976ac3. 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/CANT41800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ee96aa3589bbb684dd63aa4e4eec7a9c8268bcc877886a128ed2dccaed6dd2. 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/CANT41800042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c7bd769876f9303f5012ffb29b916d2a32ed04c36c8427679197325c0c9ce. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CAN112200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72037b0d34a950c74bd542d8bd3fa728852fcb886769c0b81885317bd704c3d4. 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/CAN112200484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9993e6b313e633b9bee1f1c32d69a7019cf65ceb76887ddbb1bf15fdbad1c74a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:53:32Z), 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/CAN112402707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d96757fa6eaeeef1b29bef3904b0d62b4849b5734ce12e9cb9dd2a47074d9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CAN112402444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af28266eee93f48d6f076f4e20122b63862c87545a5f2bbe38bea4e742bd7c. 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/CAN112402091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45af28266eee93f48d6f076f4e20122b63862c87545a5f2bbe38bea4e742bd7c. 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/CAN112402091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d96757fa6eaeeef1b29bef3904b0d62b4849b5734ce12e9cb9dd2a47074d9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAN112402444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9993e6b313e633b9bee1f1c32d69a7019cf65ceb76887ddbb1bf15fdbad1c74a. 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/CAN112402707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7505a23edefd0e3ebc458c49bcaecc075c8733b23d07fe26516cbeb924603c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAN112500234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7ef4de1dde8c868e4f30aa047733838a2fa525108c98c5090354f0f333e5db. 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/CAN112301353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06ad6bc71a335b917276f072fdb093d7cf1b570084cd7a5a247e4fd7ad827b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAN112201202.