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 0x346f618fae7ea1d42d452560a25a29b5eca5ffb6e3c4cf4ca6db0a2d8022a7b1. 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/08d609c9-cb41-40c1-8f0c-2be281f436c2.json and https://artists.proofprofile.net/proofs/artist/08d609c9-cb41-40c1-8f0c-2be281f436c2.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 0x5f63895bc3a20940fda7d708729da3ddcda08fcf089c85c6ed9b7771c13b07de. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLRD51632739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcdb5148ec4abfc57c84e606aad8310dc024365e1780b3e845a1a96dcce9e86. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NLRD51632821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fe77fd1601683a338ed5446ee2ff63e036cfd293d19027ed9969629ccfe6df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLRD51632868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3f3aae4f4eb116dfb83767a4c0edc0abcccf37dba0465f8cfdd7ae1b66d4e3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLRD51632905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e464cc0cfb653d990bc50450a98ae17a545b4b0323bd5fd370223345f6004bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBTDG1302486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce14c99a64202f5c5001b9e4aac71bc2550777e5fb8d6cfb4004918bdc16b1b0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:53Z), 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/CA5KR2249723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe699cb38c68dde7c609d5a07a31cfe7c6414c7627cb74d50f10e2c7923c6c267. 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/NLRD51632992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5585140d918bb50d63c1f5c920273def0556949d39385f29eb80ec3534b29ea8. 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/QZHN42314790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26131f43527e4f0b0fbcb2f40a5f76973859ce9ace07a17a0124eac2f854077. 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/QZFPL2100359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb820ff2374ee4a4f95d3163fc8369fb11f7290af761ed708c860dafde19f461c. 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/GBTDG1302711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6e716715c2beabe4032e47c7233bde6a40be75213bea30aa3befe167e1c33. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GB2LD2510085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83646db9bfd3aa10764b48c27d7eb543ffa6817434b95e57e733c57ff636c211. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/GB2LD2510008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf6e716715c2beabe4032e47c7233bde6a40be75213bea30aa3befe167e1c33. 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/GB2LD2510085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7762803da16fd1628b4067af8b415fff1f3c1c6435f83ccdac70de6e52f1a6c6. 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/GB2LD2510097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdecafcfa6031387c4245d9266d6db07cd5984c941c7781daae65324ced7d11. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GB2LD2510098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21597ce74f144c1ca9d1c6d9081836aedaf3dcf0abaa9971030950afa94d1fe. 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/GB2LD2510099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13eb14e5400895969ad3210ee34f427d110c02cd1bc7a244fbd4dec0b06a5a7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2181035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe776bcfb365dcd16cd01c9ae63edc05d10b72c7799208c559208296f597362e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBCFB2200175.