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 0x67473f4d7805911a4d0383d1ea023ba7b4e58a2a51d9ec29450c2c7f74ae2ff2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2969ef83-c347-4125-b273-7bca57b2011f.json and https://artists.proofprofile.net/proofs/artist/2969ef83-c347-4125-b273-7bca57b2011f.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 0x2a2cae771cc79caeec4d73f947c1126d7c7cf72c8ce85e78c11fe10bb7b89411. 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/USUYG1558650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab1a47c049fc1801b9bc02ebc129ab1c6b8c51b9fd1c7c4575639b4b8bf39d5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USUYG1558651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fbd0794742b5657b1c9f3372ef1a72838849251504d6a4e0879d90a6658adf. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USUYG1558649.
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 0x4809237b65feddd350417c6856af2bcc282e1e25c2dd10ff5e6aa04ec274ad4b. 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/USUYG1558652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57154165a5d52bfde55955d6f0dc36be4201df3bfcf4636f443646b23bdc68e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6F2043536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd10761b91bb4d3afd7de1a2aeb16990bb3c1147eb3d93f511fbdc56188c7ae0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6F2043539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39fcdb10ff462760db8656e6891fa74f9dfd1ede67329042343aaac4361d2d9. 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/QM4DW1849153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65299e4a9717b58d9838883fcfa54ebf726a14c5371da46b63138ebf708c0e4e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAPG1780184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58f555b2a2f32b855fc647ebf2b48e1ba2a79c80b90bb87efabc60d03b5ee04. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZAPG1780182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fa4e25b1c39776caaf8d618b3fd360dfb1d6a994e65a52e16f06c7953147b2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAPG1743815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0037f3e50d715646d1d4aa61c9523a47b0c4a1439a4069d5d5a5dd59367213a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T17:01:41Z), 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/QZAPG1743814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b656e0443214417377af8e6cd3ed168817098b1fe322bf4fe92a32b897c5fa. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZAPG1743813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a3c11f0189d4b5618c10d119c9de297084a6e265c8e1ea44d82d46a523018c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAPG1721094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76136e4bb0ea233dacf7dc72259b8512ec1c24b7d4ed00b1a91e2bf815ef0c9. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZAPG1721093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3faaa0513c97399ff157fe1ef462bbcf73acb8c9852ac3b546ff5691ef3f7d. 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/QZAPG1721095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac823095c1fc2d082e6bbe13ee16d55a1145e3bf09de40dfb86c9a3618fd065b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZAPG1720848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c656131aa5d41506b3924d3afe7bab1474691177bd8eeb9cd95623216c54eb1. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZAPG1720846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f4cb1bac01d562948dcda207a4b2ba68d5f5d4a1c07c9d18754d0037148bb8. 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/QZAPG1710723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1a4172c2c2e7032f5438e41bdd2e97f801a4b4607667f68c9af465ab3dc2cf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZAPG1710725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7937af1e3f470f4efe56705a8dd388d04d8772aec72c2a0f6a3c4627360b07b9. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZAPG1710724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e46b787870fa6eeb8c0c1aed414250ede48ea4028a71fefb159c35d506028. 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/QZAPG1708740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe483a27e2e4bb8fb91c6d58abcbfb541896ee9d1119a58d78719b7c04531989. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZAPG1708741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b0ed04d77c4d137aab2ee4fed3f0652a8ed06fc896f44175bfecd41934ab54. 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/QZAPG1708742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c428c75b4cbbf8db9f34f8e1dbed3dc72e14309be1254e26211fafbaa9c4955. 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/QZANL1754435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b37e1cb4e381fe68bfd609d04d7a1df5d2a5b0bce0abb6b8aba50b955cf7d4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM42K1708006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaccbf186da36ea10f63e6965bbc26163146e147beb3f1030d4f0482598499e5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM42K1610175.