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 0xa4d8fe107802e375008405f6740d9ad716bb0199cff386c919104366d9828573. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6579c268-70db-46d5-89d5-c5e8b5a0b1a2.json and https://artists.proofprofile.net/proofs/artist/6579c268-70db-46d5-89d5-c5e8b5a0b1a2.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 0x454c42b661dd82f91b59812661346d66c1b841bed621cf157048def2a45052b3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNWY2426703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e55d6eb6d595b2876aa0265b9b629a5917b22a31b61234212550d267088eaf4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZNWY2426704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b37d02237005a6b7b58ba85d3b25d93bef487c1441988573cb809a79b53fb1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:44:45Z), 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/QZNWY2426705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2751b3bbfd4f783966f253fcb88c6663505ecbd4e5ed4da433dcfb22a536f8e7. 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/QZNWY2426706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad181654d6691792b4ffa84851d96c1eeac826a2a7ca8b48ca34d273a7c98c6. 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/QZNWY2426707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cc7c7886f99d459e7cb240efe61ace99b4e2cef0e08957d0ee68fe75c687df. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZNWY2426708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2051556f781ef6726e6ac3453513b2a5b86edb8eb5d333c9ade81130814aa7. 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/QZNWY2426709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7ab2c6d26e589d68101421d4ade8f437962b5e6c97d263c4a0464e92454850. 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/QZNWY2426710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f005c52c2b64141cee4ab785fed91310f06c4ce40c52221384aa76d373e6b4. 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/QZNWY2426711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5871fb42b20c37d604fafc659d7707fc49fe53f105559adbeabff1d1a7a46794. 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/QZNWY2426712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0149d470e7d886ad19f9db71e8f4d96b0bed1395e2374260214ad10031a3a80b. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZNWY2426713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a58095f8b4a4b8f00e7a4f4ae6870201ae6ba05b27d3616eab58087af4e7eb8. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:50Z), 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/QZHNA2530036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3308b43c6dfc48b4ff93c6e13ac2f7c4ebed139142bf836eda69dd745bb44fd0. 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/QZHNA2530037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b11c00889bb5164375bbb9aee6f0faa4fad661a5b74c8937289462e60f6bc4. 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/QZHNA2530038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9312908ae36a09289b1229abae05bd4e3ed87fae3a998c5b551cf5d2499ce9. 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/QZHNA2530039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89f33ce698637bde3a491d38d66bdccc9d897350f56740367ff6efeb6813ba3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:33:24Z), 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/QZHN92591987.