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 0x53d95dd98468cd256429c3c55f6bcc6af8bd57041aa97af4d0588806e94421b1. 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/44ab80ed-36cb-45c9-8bdb-5a1c7a912b7a.json and https://artists.proofprofile.net/proofs/artist/44ab80ed-36cb-45c9-8bdb-5a1c7a912b7a.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 0xa6faca84f69e020312c9ed4df4dde06478d180de36d729300f66968fc60afb74. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US7VG2393694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60527e76929eed694001049baa6ebcdeb86d9fe0d7b3f9458cb4b348b91f81cf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMZ92323466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e819020d2826883c8abc40417c6954771693452ccb37bec6bc8c7df3d168bd0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNJX2324247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871179f05b52ad10ec2aa12d15772d32c7bd0722c5b4784f4d22b830877f95d0. 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/QZGLM2428008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cdca546d58e2329552ce844fd36aa26322e5b06c896bcb3df39c2d195436b5. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZNJV2423241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a4009fb6579933ab69c0aa085b4439983539d3130542da5a9a94910fb08541. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZNJV2423242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700d710637d1e92c83e9fcb92b11f27221d650cf014c26e314f3eebe86d8e0e9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZW9L2388166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff23ca8686f31a6f63d126db1d0a6bb5a255b198ed5d4a48e580394e24395a1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNJV2423243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9924101a4920762d18a92b1e2114ef37368ec758c381f3e8905b00d679bf36af. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJV2423244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaec73e16c210b24f963d2423615d35f441c63ea04a6cd9e6dea18abd42fb1d4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNJV2423245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a535f5d1eaadf9fc31217fa40fc132a9df46acaf6e00250beafd2dfacc2d57. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNJV2423246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fa8ba546db3093ca391191173e37f9801cc61eb78dfc1b90f24a755cf7d900. 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/QZNWU2424203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcebbe684be7358dea6a0bf820e47175ebd61a968aa601a358bae27f4b386e5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:27Z), 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/QZWFH2461343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2261c1e2591d138977d933a3b5733f33c0b08cd943160e611ac912753fff192e. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:11Z), 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/QZZ7N2465690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f17d8a188088ded495b4d89b6c1dff7f6f563ca990edb1171bf7e5aec7944d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ7X2465931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989c4b3c48d516973bb4d52a6d2662c1e5b74456e908c37d0b0758656238c40c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7V2511149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ca2e98f025cc62f91197871849c3a70efe94a3afc9316340787a87f7b07c12. 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/QZW9K2316438.