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 0xfbc2bf631921b2d74d8503db05ce69cafdcf9c886335e61f6b4f371792035923. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fad936e-1bb8-435f-aac3-d9e526894943.json and https://artists.proofprofile.net/proofs/artist/2fad936e-1bb8-435f-aac3-d9e526894943.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 0x627ce050fa5dac3f0fb9f10a664b389428af001b811ebda74deea7089cc377bb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FRX872326673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1a8400c435f4bd665aa5dce6e87da90332b047af190af79ac80fbacb9a9b39. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRX872326674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2fc25066162c5796f768bd5d02218475474c46b3505a3e03b5e51e5671d535. 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/FRX872326675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e7932cd111c3309250f54dd41426024cb125a3740aff72be45473d80da433d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX872326676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd97b70d38bca909671c1d99404cd65f08d9b48c1c00c43a8bbf0dbfbef8d460. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRX872326677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e304050399e04b83978200433a4b3936303bc6ae4937387e27201d99b4db044. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2385779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6128a08d0e977de7ef0d37e90d0a716bf418daf575c5e544e4c790368371ad. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBKQU2385780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05902d33738be724e4cacbd906e9bedd0ac7221c4cc9ad3c2b76d272f2f0f9eb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBKQU2385781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37e3d20433da42e4fe8f865f9e1f3d5b087f21685571451a19f2dd4aa713141. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKQU2385782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857226b31f1508615466e3fe03a20139d250b76d640339c05edc0c5eaf115cdb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHL2364454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6d460b1fbf511d70449d9cbbbb990889c6c3abb5043a775dbcc1fa62f911d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/UKWNJ2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c8d561b417e68dc1a09542fd8ee50e8ae9c185d06bd8f4e8cc41614f1c26c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKWNJ2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369d33fb08778db69c427eef2ada0d428d03ad6368475d7fa2cda069a8d79096. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/UKWNJ2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd21d5e773a8e3d4594929841b850951c1dd4ef68bb28a0cd6caf533e8ff29fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKWNJ2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36eff9c322805299de420eaec64d54e38acf82dc075402c72af302b98e7f6b2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX872329541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596e29ed4130933aba8703e1fca7e6f33d19125bd532175179d6d405c78ac331. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX872329542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bc07da2bdcb2b98e2687d63c3b155edb61f6b14b0dbe2dc1ebf45f3cefb604. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX872329543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4032e660be3b35b0b7f4fdaf56fe54af58c22f0dde0a0c45344440e3860077d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FRX872329544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8580fd9c4ebf9d36099297cf59e4589122e4d7840d5da237b285a95f4271876d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAGM2227176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892a0a42871a02e7f911a3970037e1f9ca105acc767f6da6a3043866d76c78fd. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCAGM2227186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d10b6f2b25187f1bcc689e642630d782e3ce79604dd4482928324d39ab56ca. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CH6542464237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194507644554ffcf5e68814a6c07ae527ca26df4cd2b13f5b74ea15e03ff6c93. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH6542464238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75be95d915403e8b03766a84e5e6de54960dcf377ffd04dd0200e8b22694f48. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542464239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4444c1eaf1f35e73755ed7514279ccdbcacb1b18b960429dc81402f0bc34bbc. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CH6542464240.