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 0xc1a5336d20a00a14f0404d097f29969333024785eb0dc7ea1c918134351731f5. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64b3f2ce-ce27-4bbf-aa7c-d2a00c2b3c08.json and https://artists.proofprofile.net/proofs/artist/64b3f2ce-ce27-4bbf-aa7c-d2a00c2b3c08.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 0xf477b8f80d12906cd803adc1880f976d416048620cc767f03424ea9020c517c6. 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/GBX722300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6640e7f9b1fd911ecafbb13195beadb10df67e1f1c7978746615acdc1408e898. 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/GBX722300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e324fb46bc5bc6dda54c7ab687212a00b959a9324ffa1e1d759b0e7e180345. 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/GBX722300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1950707420f287d566dc845887e94c6d9a8565b92e32f7e36d7624f541f9a00. 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/GBX722300096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e031b884d437d5c986dc7885d3f62ddc95409928753862b6cf6bc056c0af85. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBX722300097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2319a16289436ebd37fd4be89f52bfe539ec7a0337ad41571d6aaeb4096a31d8. 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/GBX722300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa500b05466366277ac49bc3b71012371dc04fdca1de9ea32db73136921ddb7a6. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBX722300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef540967f7256c8f7973cee4115c2b8ab5e8517e0f6957de223f2feea429c685. 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/GBX722300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe801c9d93290456f515c574e4edacae119b7de2ea8d1f143a6c7820c5cdcd423. 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/GBX722300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1c3242309261b9208b83254578e74552fc61512267c94fbc0298705ea5dab4. 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/UKEKP2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80414a7db93d0b70493bcf22086e92d0a8790eb426136dce70f8c9b2db7abd5. 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/UKEKP2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06864b441eb33d78034e5c659d6fc44e7245e5b02e699c0eeb686252b742f1b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/UKEKP2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49e744baba21e77b8056082650b5a54b056de68b91fa6fe44d6c1e7bdfc17ec. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/UKEKP2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda90032f901705ce6599227ea95c79db8459c639edaad1f93a8af6eba8344a4. 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/UKEKP2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010731e72aa37f22e251726ebbfd7f8c15c494e8c4c9161a895856b7e0e13fbf. 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/UKEKP2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1525f6df5c805252211223dfcef26f45483098f467db27e45ea7dff519c96d9e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/UKEKP2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc3e7c15e7dbebee9d8469ff427514bae93ea44dbea7ceab6badbbb85176223. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/UKEKP2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef540967f7256c8f7973cee4115c2b8ab5e8517e0f6957de223f2feea429c685. 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/GBX722300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6640e7f9b1fd911ecafbb13195beadb10df67e1f1c7978746615acdc1408e898. 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/GBX722300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf477b8f80d12906cd803adc1880f976d416048620cc767f03424ea9020c517c6. 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/GBX722300093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80414a7db93d0b70493bcf22086e92d0a8790eb426136dce70f8c9b2db7abd5. 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/UKEKP2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06864b441eb33d78034e5c659d6fc44e7245e5b02e699c0eeb686252b742f1b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKEKP2000030.