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 0x297a1a014153f15363351b9cf4a0294e1b7eb8cc0a1511698d52c9d49375de32. 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/9e9ae243-4ceb-4669-ad25-a550cfb5d9a9.json and https://artists.proofprofile.net/proofs/artist/9e9ae243-4ceb-4669-ad25-a550cfb5d9a9.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 0xbcfb80c458e298c87c051a16ad12d8bbbde7d00868ae739112576c7a7b9de755. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:22:25Z), 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/QZTBA2563531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2b2e032bbbdb888a1ec7d43b583cb1cc012b713ff0f0c2de8894819e6fae8e. 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/QZTBA2563532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2eb8ab35dee74c0754eb512b382e2bc934dd5aa8f79cf49c31caba8dfbf94e. 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/QZTBA2555672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c69ae54d18a6d3606869e42227ff9931e88796061b18c566bd5f484a6e34b12. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBE2542359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc5743fa1e491541e2c144d7091751abc013dd5afb2e34e5ecdf4455cec8339. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:01:31Z), 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/QZTBE2542360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a105cbea72825a737c31746e67842344f1c954e52486c05cea8888bbe19ada. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBE2542361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77377ddf5a1b501f951cd048bab19a0e61fee9783f19c732e9e4b360966798a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBE2548901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8192b4a3c8ab563520819fced1f462dc1a6719c083ad2c52ac2a4bd28af9fadd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTBE2548902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc90b93d6da5d6b2e2bc479a887cadfb04fa22ab70c346709d35bae14376e512. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZTBE2548903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc369216f445e11163d1cd9efcae1d549bfbd394960dde82025baada56212cae0. 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/QZWFE2526891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fe72ad95f40c6cebd08359bf85ef97be2567db5e4440ba643c05e6c292eaae. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:59:12Z), 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/QZWFE2526890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31716e8ee4c1116860f2ec3ebc70a5748d9ab04e4c9d36b8696d592901b37441. 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/QZWFE2529191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadf6882cca7c3f6c2e7ed5210a6216039ea110afc8afe16a6f403fce4503d58. 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/QZWFF2500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504b3f90ea61f2d541c221b96d1527623ba21ae5aa4f9a90c1333ae07c1c082c. 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/QZWFE2598310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78611a38fb84126a9dbae6c8e065b4ce5ac878ebb85eec9a7e4ac6ffde8b9d65. 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/QZWFF2504419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f85615139ddb2513484bf59e08d3a1e5c07277fa8002f04b668891d5d1f65d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFF2563480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634e59f79a708cb96cf5cb4029230bd041a901989c7f3f1585eb2418e4592c7d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWFF2565128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53138526e961b63744660666001acd365b84ecc610232e2f499a12b01a03af2. 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/QZWFG2531588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1947e19fe0c6187189d686c68253fd07a7dc53f6579c97095ea47545e8251f. 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/QZWFG2515561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f23a84914b1beaf38590f08eda154928225de0a791a4fe53802db7c056a7b8b. 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/QZWFG2519509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e406b6259ad1c4058ebfc5789acebe949248fad3d5fa8d04683c87212ff1ca0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:07:08Z), 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/QZWFH2526681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2df1dc1f296e7cb7acb83706efdd23413e4e97653d876bf058c1b97b354310. 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/QZWFH2528751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf9d6111ffdb26b765de7727e6dae7c5bd1d1095ddeeddc0ba48e156389d2d6. 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/QZWFH2545554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f3f4a0027761e055cb7cab6c606d2107792336359e2896646682155e945ad5. 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/QZWFH2528759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeef21d99a0bb6e29b946dcafabde8ba82fb46eaa867a81788e0af83576f2ed0. 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/QZWFH2547713.