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 0x4056a3987c6684eea1f4316f5a7a546d59ab5fc1e7364168993ddd04e47b4ab7. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ce9db58-2922-4e5a-8e20-0b955bfd80ec.json and https://artists.proofprofile.net/proofs/artist/1ce9db58-2922-4e5a-8e20-0b955bfd80ec.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 0xf55e98acccf0588465f7f329072544ca936a9e0672d82e8641b52f63ca3a4f4b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITK192200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0e074b4f14941e25cbae79717d131ad22edbd6d97a832220278793d3e04e17. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITK192200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd3da9c72ee0e68e0534f04aba66696a152d79bc3296295b79534b72b12fd6b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITK192000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347c4aebb26ab227758b878da147f6f9732c44bab72aaad65d590c5f743b1dcb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITK192200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45de2bf21d241ccb8e154e31f5caa144759f7e6134b0f6d6fd96dc5ec735a74. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITK192200159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba067e4b24ae1df603618e23adefe84a1246a077f949adb65abe132f8fba0637. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITK192200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeb6feb32c9d7f9cf587dd1049cea1a54443e86f20b9c5055bc1cb346f7de87. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/ITK192200145.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb548ca571d37dc9a8ff7c7765b00cf35edea788886ea0e5be17a5db10a180a3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ITK192200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67ec42019c440f53da5be8572d688facba53791c05047369330d86d5c7e76bc. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ITK192200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb46586e87542116b6da19033454b41c749c5e0274c999da062561a073ae009. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/ITK192200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd4c036cbdb59c93261cc6674a3de79a9db676d304e4c472a408a03708db873. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITK192200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26397f48e6f090421952850f74e9306a32d7ace1428bb2598d34ac029307f5ef. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ITK192200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38e0a6d0e63f29936b7b3ca835c7618ea15e4fff7102807794f5f65597d5330. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITK192200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fb7e72ed82d548b7da072680fae667b6281cef8ce5caff74f5679d334fc1f1. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ITK192200154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ae04f1f3837b0caa1fd9fe13cc3cb6772ccb5d67b07e469fe4e46eda33310. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ITK192200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79310491e50daedef7b46b4ded77d28814185b1aefc79eb5897d55aa30ec7cfb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITK192200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bccb0ce5cc1b2e2b91e580088410d232df969e165a374cfee91bb69c7b94473. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/ITK192100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d066a4fdce2f60b6f0e74f1b2258e5289f3520e5dba2655da8a4f5f1fd3f54. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITK192200160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007ccefc144b2613d35d4eaf1b13fe815fda0008edb344aa2702b92f73756942. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITK192000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f70e71c54c6fa3a00bbb664a4bdc5e6546e347063313e2b4ce189d97fd44533. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITK192200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe149c217dd78542569b29ba88e4e046cb0dc0a3722e12fe4179151850f3ab0a7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ITK192000268.