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 0x4e220762d4e935378adc3b704db41977c45e7bc8eb50a76ba68d14fd1d04e52b. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e9c0d91-a888-45cc-9214-a3aae5c05e15.json and https://artists.proofprofile.net/proofs/artist/0e9c0d91-a888-45cc-9214-a3aae5c05e15.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 0x055f7df12a16607d2bda511e2ce50b6e1fe8e56ad09ae18fc1c4597398cb817b. 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/QZES52485624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc94002511e6603396cfaaebea0a7b2ae8097b36762bfd7e0d1fd5923788c5f1. 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/QZHN32403647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f62bff50811590df3ab079445dbbc72899fa537168c3d8452c5dbacabac3a7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN52422216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf484e9fab6be6531dabfaca4bcc7d3f01b567469e34e05e89bbcb4b52475d6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:26:43Z), 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/QZTAX2465682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949b98fd681deac84f74da76073829ba980805bbd6f62de69fabfb3b595f125c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB22477104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bd1863deff237e3c68dcced0b1a74c02c8fba6c4301438bd30da86e942e733. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZTB82484589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff2eff6994e98ca59d63179e4a06c38f867d5abcff467434fc6d10b036d9872. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFF2495712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f037a9c33c44828b1003d70323d37ecba2e29db3ed2999580b655ecf1eb5aa. 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/QZWFV2488148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc678ce078205390055ba676360a473d561eb5299cb448ddf9cdde56f058ade0f. 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/QZZ7U2468895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8c244d30ab6d61f5fe95496af07fcf82bcc7f5f1f198291eb046ae06e4c7f9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QT3F22458959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f3d59c4ca310b4bd474858cb0a7f2ad2a04e6418aceb47eae99329de193736. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:21Z), 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/QZFYX2585009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1899a42cf08a8a3b168d43c7dd5c5984cb4039f580545d1acc4951e3963e304. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZDA82518243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d524fcbb956a0fd1f49f02263bebfbe2cb57151984c6ca0ab44a40e5f0025. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB42553069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36151bb02b902d50ad25c0abd433c4adef3b95bbbc2a2bdf53c74bed5f75623e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFQ2562427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3004cb63d2263b844133251dcbbd7c3db9dcbb303ac06adfc12d30c6152ed63d. 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/QT3EX2502143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646fc93dcec07ddf2446bd1d8e663a2b93d8137fa072ccbcbe817d62c0bb404c. 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/QT3FA2592514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3512cb233c1ae963942ae95ad36c7ba553126caf9a6ef893e03f50c7ace96c27. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT6EF2558043.