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 0xa293f6222ea95daa7f6917faa77254b5d03452570e58cee10f7296a5364eaa1f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8d95699-9408-4e22-a53f-9b124c76958b.json and https://artists.proofprofile.net/proofs/artist/d8d95699-9408-4e22-a53f-9b124c76958b.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 0x13b8cf10318072c5970b1591e40c7f4989ad0daa5d7f3b9e218c7a9960004ed9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN72429053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1c7677b70cf0213e19016931bb10c0ac3eaf7a0e197c164068b80e58ec7228. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN72429055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449620915a76027dca26707a6ad0c726dcf05bb9bc0e76b44ca4d460adcfbb3e. 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/QZHN72429057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b8b38edb38935d2d8dbba36030a4764354a437d7da378dc6c2558c7d5fcb90. 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/QZHN72429059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00146a6123a46267496c6a2b8b6b5d1dabb9c6fad2b1aa2198596103f21c2329. 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/BXJ1W2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c88f3cb116b1e07aeeee90fe2e2b7e36383e052d25d27374bce3937cc1241a7. 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/QZNWY2171937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1504fbf9ddf8befeb801b0648ddb3270b95396da043f5ba74383a1f19c7c40c2. 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/QZTBA2453104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01becd5bca6a1c7bf8e2020651bfc58c0920d32c7d06459cbb1a7b31b60114ed. 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/QZTBA2453110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32afcfb366557082229a465affa0477bd8d279a106f93c99e1a6c5ee87e4526e. 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/QZTBA2453113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4241257f05dadd2d1ad03e72de70f10bac647811d210daf81af312c8cd91c012. 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/QZTBA2453115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0614b95402f950500da254bca397fe5a78759893f7ced3a51f66643aba08ac7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTBA2453102.
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 0x5c07325a69b432621ba88815985fc2b79b19c333f448da16d748b737cbed3cfb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTBA2453103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bd99ea6f8287960d27d19ddd5ca748d1383029b9490497c4da3fb324691d01. 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/QZTBA2453105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa083c52278afc63dfa3a394eaede02170bd7b6d3ec728043c5b081dcca83fe. 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/QZTBA2453106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44dab7f3016cbbedd7a9aeb11cd8f9d7f63262edeadc29c2c5ead28247a2c35. 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/QZTBA2453107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9f7ade85d1a4d569f1742094568bd6a83339aa5ca143ed2c23d2b1b02b3282. 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/QZTBA2453108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7906ad10fd3ef88387220f46686a7c0d43cd2e27d2c4016b46b97b4fad9cbada. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTBA2453109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe7d46011975b76e7e2dc7c7780dea0a38ee7aa9a90ced5e94bef905c222919. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTBA2453111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6d32b385cb041370fcca4d82f6c11fd4deac465b4ac63d6ae5f905a473e60c. 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/QZTBA2453112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20334de0dd18547d6b52b526e6088fae5143a6864a3920d204c11b518478b570. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZTBA2453114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d727f696502222715e2c2e6a68d8cc3bed7e9110b3c63e6314d2ac8a749c86c. 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/BXJ1W1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3214a92277cb0cfa0b970b54371c6d1a1a5bb60b78c17a28c49cb7017e0e6d47. 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/BR2AV2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31592cfdaf83965c67ea2e76ca38b34e12bf9d7b786982ab84d138f7909be195. 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/BXJ1W2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf931c5a9b65422ff97cfdfc83a1d39d60db055f69fb30a60e7de32d6ad6cdbb7. 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/US7VG2352488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7300c0b2c4df90bc59a2c6e179e9a7972271daf1a5c643e9ec2589de7604df3b. 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/BC5SQ2200004.