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 0x4cecbf13b405fc297c6b8a78b54bd31751368cd29243ceaad298948193f30232. 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/878c769a-2e46-4211-bd7b-f3614513bccf.json and https://artists.proofprofile.net/proofs/artist/878c769a-2e46-4211-bd7b-f3614513bccf.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 0xce4e5c3869e06ea209dd191c0eeab29c99a65f80c8e39e28a7a9b58d5f51e2f9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USQX91201510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c11bea1419838234befa36984540abf64ad37a79dce70e4c7b422567c4be97. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USQX91201511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d57f538a1147e4d8045a62bbcf280ca218a43d81642c2a99bb972be70a548b9. 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/USQX91201512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e156ed3f12b5140333d383ac56d45c2c729cb16c99e788d32e2531f9c6d66e2. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/USQX91201513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a68fd2b11c9c70d869d8243027e54e22c77b8ca186c2c5bd760b9cdf2dd0de. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/USQX91201514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0df28c666d84df14fc2e421756d35a78922dce27030a741c93107fcb9c978f. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/USQX91201515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed97b7600737b0fc39d753f118a0ac85e79821b033d0102e0e558a1582d3cc0b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USQX91300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92895c65c1318cc71ed406bc34dbc2b1a36940ca9ffadfe731bfe7d6ad2405df. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/USQX91300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072ca5250c0be65bfef082dc728465e60151987376e7311dc8af70edb3ae9c39. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:24:44Z), 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/USQX91300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc2995851dd6c4b3a7e127e418e0a85a09b0498a58dc6575d2df36c1aaf4f52. 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/USQX91300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c11bea1419838234befa36984540abf64ad37a79dce70e4c7b422567c4be97. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/USQX91201511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0377f9b0a0277d7624dea4d58a52b2735ab68ec974f91536dad4f46e22a1b8. 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/USQX91300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f56ef7ecd7ceea97bf0c233d89db52323ea6eae8020b838f3cb3d25509e11d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USQX91300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb35cfe32c6949b92d21ba6f267784d4ca076af9b51628a88bc156a52232203. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USQX91300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1178b1210e1728eae6b98d0789e5b2abe5d22eb31e4b1ea2cf67313654c76d2b. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USQX91300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f644e42e0f877b5d6355901106e14d5a93054ff8e9a2fa64b45a837e356d01. 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/USQX91300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c22a6b99a5c8d1320a6c005e349298a011d2a21b132e63181ee5809d5d9eb0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQX91400975.