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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16ce3e8fc20f0b1787a730b93e52f1cdd8280e12fe90ac96ef7d41082ec76f3. 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/bb562d98-93b7-4e80-9201-c6d28340e5de.json and https://artists.proofprofile.net/proofs/artist/bb562d98-93b7-4e80-9201-c6d28340e5de.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d57b33328d8e7b3ca6c861ea82912685c4ebe4df13327e560308760e213972a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAIR2488581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dac248f6615e0d53793ff38aa5646c237d70ab294f20b37282485d6eec824f9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/TCAIT2453297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080655e5a6020ebee5ea88ab88b5b8f859353c6d8b1e22d9908e17ae916c00d3. 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/TCAIU2453029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afbb0c158a60937c077a2502e986142e699ffd35fb531ebaf1e51543affc5a3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIS2498618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569f7819051c35ee7d40c8a64e8106e6fee2fd5665071518fc57037b5eb89bd3. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCAIU2455466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ebd86d9035c3dcf7fe073250e2ea9cfb7b479c7c3c2190dc6dfd660a705ffd. 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/TCAIX2443637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36eeaeffea68719bf6a4b32e182f062acd2ba4b57095eee9c04992663443856. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCAJA2481968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ce609e9f968a6a38de5da3be2512e1188a30862cf61af56c9df3e7d33e00c1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAJB2417620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b442532c71a4e8f38ab9cf909daed34d36d24acbb5548a07109bd23ed68b1e3. 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/TCAJD2437985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82190cf3410536bd110e814a100b70f2ee4fc2128cd8fa18dfaa8c5e1873e44. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJD2420274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bf7876a332c64424e57d259f22f65dcf18b93715a2c556967afeb82c22cd5e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJD2429398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6676eaf4075148e31331bea4f882ca31b82e227bfeab067e14ac9c5277547ee. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCAJC2438215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f916095e5c4ba3a1db39af874c7e2b8694978c8f7bc9ef2388ee6828e625b02. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/TCAJE2589444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5b61b33b789f7697cf29e3d09bbfc3307193b0959ea880d153d545206f93c7. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/TCAJE2589470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9bfbdae91558c31377e58474826a43e82d57de72db4d2b92b2209cb766f8ee. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAJE2589331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f646cac04c17cfee3d769ffdceba47a5083ae48bdace9b5206b69da35fea114. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJI2515889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a41aad54d9d8924a0bb2565c89e1bd440d74ad631ed17d9c41f10b28f9ee4d3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJI2566586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9086c2df300946b4c44d6400ac22fa00c59c2597ad994ee1d1f7d7d8e1bb84. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJO2539016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacea691ca8a14f8d4f5cb7b14a6512f1918687c83c9947a4855c3885dd7cc5f. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAJX2526872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bdae0372a6c3a0297d4d327e02f68e135c2fd3b5cfc883a84244290ec9fe66. 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/TCAJY2591027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a8eb553cb2df9f29bb948b1ec2846807248e50d787145daf6cd081fc82f64. 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/TCAJX2582880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3394a702fb28250993317968fe6d990e28da10c79ab485701f0fbc0d1fba5e9e. 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/TCAJX2590916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c739c5062c04082e671b09ec91ec39893ba6540c08f8dd5c65075e24f3db700. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QT65X2545225.