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 0xc4e7646888efd28f1574bded66ff7da64149b8e3b3999155bc19b546361751d9. 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/fecfaeb0-3231-4652-8f5a-b2ba653ea69d.json and https://artists.proofprofile.net/proofs/artist/fecfaeb0-3231-4652-8f5a-b2ba653ea69d.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 0xa337c718632962f1edcc891d0cbf89fc0850c4bd31bcacd5f8891b81bdfa31a2. 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/SE5W32405979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933137ab8a72a18c865064db3483e519dff9b4d7ea93a1a77a7ce3a344385517. 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/SE5W32405606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54941aa5b1a9640ce9163e94504b963dd3c28697ca8e30a5f235109ab2a95a4. 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/SE5W32405337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f85d2a39586f708e5b95ea15f540c7193efb8a1d7407f848b486468567d7248. 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/SE5W32400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454a9803ec36a02694549569a250f0e5d731a651d2aaceed621e5e476fc87f6c. 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/SE5W32309703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a06919e6906b6b6f6474c2b34a29bdbcb0bee27da3387b29bde2b877036c2e2. 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/SE5W32309182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27805a89f70920a529b1eb539a97f1352e17206d3fd7013ffb01f74c5364ad6e. 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/SE5W32308435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeda21ed2729bb95915974910b83f21c261e646fc4bec683bdb83b665e004217. 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/SE5W32306573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f99c157f390511b84cc2f77622187d6b3237b3d587c1ad7c9f77a7d2065c7a. 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/SE5W32305956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcec6f12b0581bfd5214e8494ac7b3219bcd998a07932dc0de68226a0eb646e. 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/SE5W32294706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27d29aea329d9387b966120b7c99cfc80a7404d096946bde54f810f9bb6a50d. 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/SE5W32204246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8e634a9a1857403eb3384d1ba4b35e1167e3a13ca863f308754a97ce9874b8. 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/SE5W32203169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc651e56ecb0612fb0c209385ab4aac61f30cd06fb85639ad2ae8ac9aa20b529a. 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/SE5W32203170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d31d098c660e941ab7dd9e8aa53484e01e1ab07c3ee3b287ec2eaf78ee1fc44. 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/SE5W32202057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd494cf64c091539f7cfed78ed139513b72baf4e48f339da6acfcca39786b832f. 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/SE5W32202058.