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 0x2962eb75ecb18c61e37bc50aa1cd681fbe2a6924f8953209c6250c5f2923fe04. 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/68df9f34-985d-4127-9a75-0a046e6615fa.json and https://artists.proofprofile.net/proofs/artist/68df9f34-985d-4127-9a75-0a046e6615fa.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 0x517af6c8eb0fbe131e4dbef553c0c75611647b78543c67b90d8275cec561a157. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZMEM2257999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c560fa6eaae34354008a59e449b135710f49f354ee836f39bbcab19c8ddf215. 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/QZTB22223915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d182f102521afb323a0531caf41d08c6eedd222859c29d1bc9b0940be4c4db1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZES52342547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cf3be7ff4a2b5946ac85bbdc3cbe562fa693707291c962f25fd45f69a4b3a7. 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/QMDA72335721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb354459cc7d4e38e6f1697d71156068790618a33c9c105c35e0381fcd21bcc00. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QM4TW2498316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd878e527802cb3f4292601aa339e67e137644205cab155a95949cfcebadcd117. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM4TX2425780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1055b00259e94386b77bf3200eae47759c7e2fc59ac6a77bcd42eb123e3ac7b. 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/QM4TX2443089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e398399e3d298c23c520848e7cfc386025f6cf82dc844034a80e531a58da83. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TX2443091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e221e60cb2177b92697d0ec286428e853ab7bb61d58fa36b03a76cb2e127cc3. 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/QM4TX2443095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2224ac10c14a36c13afa6688fb2ef3ae84bbbf04fa6f1ab800297343475ffa8. 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/QMFME2418979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234c194a525122afb8fd629f55924131d864477db221a9b7cf554496b544d885. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB52566436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234c194a525122afb8fd629f55924131d864477db221a9b7cf554496b544d885. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:49:45Z), 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/QZTB52566436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133444cc9fba61ccb3c768087c0381d17aa7d0a7f71f91e086defd2bfb91940c. 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/QZWFF2524609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc004bf9007aec9a58ad5d1a8403f531d838e1cd46a2a9f2d15ca44ca4d44a530. 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/QZWFV2575661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8111d7e56f2bbc792f4bcdfb39a005678c6c65486cf84f81752c73c97e416b. 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/QZWFV2575662.