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 0xef4d9ad170e75f51896bd633fc429b9ce521b288d6e2a694abf22d6d0c781b18. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c5f6dc0-86fd-45fd-80c8-1abf9366d972.json and https://artists.proofprofile.net/proofs/artist/7c5f6dc0-86fd-45fd-80c8-1abf9366d972.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 0xa9d49e10e3bbd02bd23fcbe24c2e117b885a39ca676fdb0a98dcf6bafb336d1a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPW2381064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6274528737ede576ffc0370d1ed9756c5491ad8db75212d365cde4f56819aaf7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPX2338991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74446dab9f34063aa5750a0c41fc1a6628aa4712690a8fccb6a93d840c26fd97. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/TCJPX2340031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2ba3ea3e8d968e0f989183ee320a0a9021ffa49dfcb8146e76023f355effb9. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCJPX2340033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa127feb620da4cceb344f717ef758434ec45a8f7eb5cb0242bfa3110b4b5f50. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCJPY2304066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e234add18a0098e6d93a706da68fda17699e10f6faeb7a747fc44dec06c25f. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/TCJPY2304068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a85d1592bedd5a8a44079418734bcff1897c139c4ab559e69febab7c19ba1ad. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPY2304612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16aa0f1280673caf7eadc795bd20a1f93e4ca6028da2ccdca87c756a36df69b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:40Z), 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/TCJPY2362043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb475d0f8482a892b02dbd10499e9bd08ed67500f5cc0afdfe7a0d265fcd025fe. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:00Z), 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/TCJPZ2439025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5654abdb844a2a347206c1ae0b5bd6d696d02e386e083aa7f43f1b9c46dbb7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:33:56Z), 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/TCJPZ2470859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6072b7afcba5f160c017ad16fe70fc4a324304328654467ff6a59e1be52e5eaa. 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/TCJPA2469975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a721b5a7bda605bb6ae95f4597c014fb6d09e25661532f3e34c365c03b7fe09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:16:35Z), 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/TCJPA2470037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797ace67225ff4257d33c36473c96d6de6d6038047c219406a1db321919b8b7b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCJPB2485524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4747802c24fd739c5ce3377b50c7e2d4151574a942c2b82e0d3144c6d6068f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:51:24Z), 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/TCJPC2444614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa053a052b03980a4e74d747cdc2eb1bbca2d21f88a896401fcd04f34b940e8c7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPC2444629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef226daed31285393d86ca7e37a6e6c5508f64b8c2457198ae962a4f4d9b85f2. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCJPD2400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fb542ec02c532c5a47840402daa4ac87cd70a8053e87fc685c106dcdc0f9e1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPH2571104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab3bd5286960724153234e3b61fed60ad882f24cd3e2ab3b7bb903b4d6cc029. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPI2532484.