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 0xd3a54f05bc6c8992d2bbc404b684e19345eb4c6a80cd58573920356a3604272a. 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/84df0bb0-8d8c-48fd-bd85-f4b126f18d6a.json and https://artists.proofprofile.net/proofs/artist/84df0bb0-8d8c-48fd-bd85-f4b126f18d6a.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 0x1ca7a2fa9828d66168746b9b33a0744f78cacc02c8bea75ba45523ed12546108. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:29Z), 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/QZMZ92167814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86d3565442ad8827e7c6c97b384d1b6cf735d2e8676503bfe5f6dbfa6640949. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZTPX2159203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604da384ffc4d6178e10fd960f6af9bb966664f04343aed1557f67fca84a0541. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLM2264315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051217d1bebd3368b49d1ed16aef2f6ba4878b696771c3eae31d017f0805e210. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZGLM2343886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e128af96c03ed4a1a9b137509d9ef9c0ea763795c2f1229eee7982a79a508a3. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZGLM2343814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86499b90221c6fba887bc0f5509d36c277ed35546cf181a0c3c1748304947dd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:53:15Z), 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/US7VG2444588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607bb5f1f0b8639d145dd82af5e2de8e4a665d2ec0750b8d44c440368456588d. 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/BKAKS2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bba58d7967bc72d1f73f3da17239c28cd43ea751e431edc54766bcccaae8d9. 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/BKAKS2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbefbd02c250e669e136f5068000e9f801fcc1c848958af271d98cf326785b93. 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/BKAKS2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f69967171b0ffcaf387a889a5254941b014964cc9da49bf4bb43dc5b0119f77. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BKAKS2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323922a21b049770306975e81e7b9be44f5495ec5844c3b28a68cd5120478f28. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BKAKS2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47dd0c9e7f012f41a27e0ba8f0f646991414d765c41e9737d480b2316cd51b. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BKAKS2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59ee8738b1307a17a434ff318bc6e653ca591642b794234a3fc0a96a59fa646. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BKAKS2500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5bf43414b0bb052c0fc9ba2e216642c461475a8e68416fb7f4effeda0023ac. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:19:14Z), 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/BKAKS2500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c1447bbb71fc3dd9b867a74699d6701e4e5553e82914870e4a0e3781eb97a7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BKAKS2500026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7e350656b26e64d8b9932ed8d3275a7e0be84003ac1eb69c91603a6d703415. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BKAKS2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec4292bc296e5f0d50f4720e0b2721d61ab6eac72c51e9d85649f740928831f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/BKAKS2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fb63392cccaf686b86d8664606d6ee5b6d407774debbdea0cd562a15021909. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BKAKS2500029.