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 0xb1a25dd264985c571e006d707203dfedb3c392ed3c3ad719f39ff80672ff5730. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12791be3-6701-4986-bf47-22cc11356330.json and https://artists.proofprofile.net/proofs/artist/12791be3-6701-4986-bf47-22cc11356330.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 0x98b2d3d5ca11b5336b87642fd769d14cbf1c0ac14f055a0a3025bf7b5f81791e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:29:24Z), 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/QZK6G2541336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbbaab6eb4cb96d2342758137b05271e1d2bcfc96835cae33c0e3156eb04ff9. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZMEQ2594593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ff6dc89230f014cf46fc04835c2c79f9b81ce1c8d5a9d0a1cd40255db10b6b. 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/QZTAZ2595664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e33a51c8af48f52d2f58c52694d0da59acb97189e3e2f36bf6116d6121211. 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/QZWFJ2592001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ebb3473cae110623683acfce6156a644f7eab72a5f89c5bec14462f71ddec1. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFU2571643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63565351911a2c92f9ea86d8b4db76904f06c613dc46796ebe7e426f01f61cdb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT3EX2558018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13fb3c899b711043726d314fca6f9642504af94e8b75af8c5ceba8aeda03ac3. 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/QZZ7V2507237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c887329cbcdc0bbaf580c886a0e3950240ac2cecb2fb62f86516b724acddf5c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ7V2507238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c6066e31b9ec7fd05596b7151fe9437eea325228fb3f61d7553103a5aab460. 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/QZZ7V2507239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf30cde71713748b11f63c4e3eb2416e29e2e1186a5fb4d401f6d8e894335e75. 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/QZZ7V2507241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b94a741a91d9a3d57e61b947c62750217787f303e74d338d3aac0651474ce3f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:57:16Z), 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/QZZ7V2507242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcac9258fd71e941e569fe51d534bffa64520c9d98823b2a6a874892d72c58e. 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/QZZ7V2507245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d157aa700d06363e7e9527999e5116ca90a975625c4459701489d8166efdabe. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QT3FE2513910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86a987bbd7b0721a675cf625ca14a42462a0cf86fccbc8a48ca288645ebad15. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QT6EA2537873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c63d2bf8c9ad559a87a91f156531f6547a0115a98eca7b4239c8e7667bf40cb. 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/QT6ET2529863.