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 0xeb9459d6e7e3e9fcec1be6324c49a7fd28231d0fa2292ff55beffc321fe306b4. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8bebea1-eabd-417a-b79f-2b2a4a28872b.json and https://artists.proofprofile.net/proofs/artist/c8bebea1-eabd-417a-b79f-2b2a4a28872b.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 0xbeaf765f1529220994e91d11aa8ed62e9743dfc6128527ab90f55783cdc36621. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZTBA2317168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb797811d6647b1d8b8fefdca37d3b410b9693c54ee87014c1c46de82f1fbdb2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBA2317169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81deee477e196eb9728a969313b91a03d7ff317004bcbd9a78709a906d887bca. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZTBA2317170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d64c36a165ce2074cf0d0730f2c49a65d2f6c4092674c2f53a7383e5721667. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBA2317171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4ed554fde4537736b7ea5e166dcad0d77192d4213acff60f4c61773e48bff. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZTBA2317172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6dcb937e01e6b8931166f7753c71ca25986241b86b1d2b9fd2a4c952d07356. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:47Z), 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/QZTBA2317173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc069eb3400548bcd6069c3526381f11aa92a5e9dda26ea8c93b4a6592efff235. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6Q2414191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd361bd1204f86d0959d48a180a6f98893c4aa093ec1d9672d594b52a0822f129. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2414192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa90ac1b33c54ce0e661bb3ee32775ee2827277c9cccdf7c2611bc8c9db1b82. 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/QZK6Q2414193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622ac3bb80a562ad1d29e2621e340db3a6bfbac1e3fbbc56e9d1fb9cc959fa0. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6Q2414194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb06baa3be7ebce8e03b88025d6b7a58d21a9e5055e07ca52aec444d059f4bc. 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/QZK6Q2414195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5200384348fa2a77f0e7fda91dbf662a3a9e17a868ae39908b1c1fe25b170fc7. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6Q2414196.