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 0x1ed6e6f2a797504daeb541299dc33bd13097739a53493ad120f653b5689b1c8e. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a8fa555-0276-4791-81ff-6db70af8704b.json and https://artists.proofprofile.net/proofs/artist/1a8fa555-0276-4791-81ff-6db70af8704b.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 0xdb76db5545df41208aca4c0d020c4bc383347fb95948148fc12bc0418e7a3cfd. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/JPW462435560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a367dfd3aab772894e5f7d2f3a5015bccee7741b04fbc626a3d018c36089c5. 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/JPW462435561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8da9dbb289c09d77923df8e64e964656f243e491c47a8cfd74c48f5b334a63. 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/JPW462435562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58452de1432c1781928c6027326f455cab6b9901041b3d17c345e14e986b5ec. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:31:16Z), 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/JPW462435563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5adb3d03bac026f597570615708dc35c64cc8666fdc4e36323dcdce76ff25e. 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/JPW462435564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e28f1ae17d442220c2ba8c57c259e83b1607a64ac0af127dc1e218ce1938d77. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:41:30Z), 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/JPW462442878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9639502d3fbfdfec8b9cdb9e6251aa2e69a3314172e591e34895e74c211ccb. 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/JPW462442879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317a4f510cb8e1ffdce5d44954ea72cb80ac032f35abe1c918871867e2273164. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/JPW462442880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d915b1bd4275506423a9183513e5fb323c36165dff0c03cf0215f21552263c. 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/JPW462442881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708b3519c3c25b787e13efe79d8ca4898d1d61346dc41e5448f36cbeaece5362. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPW462525274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedebf9e24e627545d86ebb567bd19f59606de7aacd449c5b263df5b83fd9ed33. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:01:42Z), 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/JPW462525275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85f828c6f3d0421522e67a6f0234bae18334f3031d261365bea69955d5a6835. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:49:28Z), 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/JPW462525276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65104a08daef5e3bd9de117c0aa5d9826f9b48d8e053356a95ddee532bdc9d4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPW462525277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c0e888a844d36d5e43a8c65497694b5eb98960a269f4d90d8a1c8bd03dd554. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/JPW462525278.