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 0x447b937c1a7cb6895afae84bd86f524f86b41543abab5803a5b99a2314b0db3e. 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/12f32d83-dedc-4c5d-8a6a-186667506e49.json and https://artists.proofprofile.net/proofs/artist/12f32d83-dedc-4c5d-8a6a-186667506e49.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 0x5517b65eeafe5beb880cb1d0db6d617443a594c3d2092f24b75da2076a4bf68d. 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/USTCB0928739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52429a81fd74706b62bc954557fb1ce16abfe6a3a8bab85a6024c01e512aaa11. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/USTCB0928746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d341f8957040e9ebc64625f3862f10ca6be65636d1b7f348617c670b71cca84. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:18:17Z), 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/TCAAY1172014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b413e17e2eb6fdb71f544d9d8fe03ebe457bfd84721d24e5a7686d835273275. 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/TCAAY1172088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1981474088bbc0e714dfaf064dc6241e4f1c76ed70cb1fdcc0b970cfc88692bc. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:35:10Z), 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/DEW241700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f3cdac0629d62f9a8dd9dd80fd8e551f92b56da58b9ff20ce61387f94ea58. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DEW241700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c81ade2c1cf63667916580381607f8a22231148b41f4f8a370b9c8074b0fdd. 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/DEW241700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4513fbc36b4c82f1cdc59f82f3d5a2bc047a6b0a1a4ba8760f220ac3838c8f38. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEW241700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841d6948fa9736d3c8d1f0b08c1129140880febe1d0ec041a712d8a628b0f00d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEW241700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53f0c1299ad170b5fd99a3209d5f80d784b01132d40d506bfa63376f06de5e4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ATCF12020102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0e71aa07129f1537b5c665994a594d784d87fb870426ec4f18a6295eef4c96. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ATCF12020105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b07210506f15c4855f3eba8d9a29b0ecc0b74dc7d7aedac38c5e264da29e729. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ATCF12020110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4434f3e57ae754333536a41115de638c9e8eb19be8f363a055755f3b1286e1. 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/ATCF12320103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f364e06b0f06adb7c105a69d163138a5577f100cbcedfbb3adce186ad77f34. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:27Z), 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/ATCF12320104.