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 0xf33e2fc21588e802d53407fb1fca779ebbfe305d9326dc1d4eb7b573f1fcd6ea. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/859f4b67-712e-4ea2-b8d9-8e0843f5e700.json and https://artists.proofprofile.net/proofs/artist/859f4b67-712e-4ea2-b8d9-8e0843f5e700.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 0xb3dd5dc445096b6414a213b328ec5ec40ec743fc1de4ca2fedaa2d6ee2c1d20c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJM2538722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde416b7655295572740d1f3d3b999c89125f8d0e0490ad533fb739019fc16784. 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/TCAJN2538736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe1b49d9a1116c93256cf1fe69cb30f46b88613dfe4af7670bbcff5f6829e9e. 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/TCAJO2507627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543522acf19039bae1153c284925930ec74081f62c470978a4772d1fcb129bac. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAJO2507635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfe1a4eacfcc10bfe92b9d9e579f729a9c72d008a15246efe539c513676cb79. 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/TCAJO2507637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcff7032512eaf61e7c6711bc2cc919d17772e1446419c97218c3cfc541c037. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAJO2507642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e2c5cc8dd1416e23b2f68b93cf782c1f0aef8dc0517e781637cca2d989972a. 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/TCAJO2507644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe8d6d6c1be6957c59a6a6498f6c9a503983dbcecb9f66accd372b3bbbfd67d. 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/TCAJO2507648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071589d60dd1ebeec41b7812f3e06812b5bfe81f3ce711500572bfb4a1182f2. 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/TCAJO2507653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ce9814e225805cfe2108a0f882b216de69742c2179c97e3772aaa3c8dae1bb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAJO2507656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63f7801725773bba8e640c76781ab3d26def4c93ab16adb8684ee556de78e70. 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/TCAJR2567685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a80b474583c56e97107d3a64712e46839e8819d41926b7e5956b93126409da. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJS2567687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb7ae97bf8fbfb8d72afa726ece051ca0af1f9feda74ee34c7a2653aa2b301b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:27Z), 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/TCAJS2567689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96988781f60599a6d53a92c656b19a72a76e1991a67ed0cd719fb8a07f325151. 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/TCAJR2567694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc430d4224c387bfc77e5c9a1ed4f5128ab5a4546b21604d37f6998e1808252ea. 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/TCAJR2567696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808323ed715b9560863698f0fe4137fa2b763ba291139366fdcb9cf0f76a9436. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAJR2567700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4e30a7a96198da211d749755db412115ed8e1ac2f58da9915edbd7fa6e7c33. 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/TCAJS2567703.