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 0x8d54dbf89c3f7328c5dd572530f266f5cee52a73f4e503bc30ecefd81c68f3f3. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76cc4308-4ffb-48dd-b972-2c7674388658.json and https://artists.proofprofile.net/proofs/artist/76cc4308-4ffb-48dd-b972-2c7674388658.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 0xf1f902801307b8d115838be364870d784ca6d8507e77d53e0387b55df2df8d72. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRX452428975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbc7bf6effed1045f29739e4f165268cfab7e273367bbedc0110e6d92220af6. 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/FRX452428976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf22897bafe4039689df0f990896d7af883b8099ca18138460c956eb8810c4c1. 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/FRX452428979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac285701584da51a042496ed2c1762ff2e198004b9f0d1879e812e7b90164d9. 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/FRX452428981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118f4c6a4aa1f2e75717759179177a3a9ef7d52078ebac3202383262732a8079. 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/DGA0R2492142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb183771ce9a286bbfebcc77451eb811a0050081d096803dc0fe19f050213f06c. 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/DGA0R2492143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c96883bca577aa64f0ac7c3714eba69233eb80e03fa53c25cdd0af95faee17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0R2492148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3266b4049deab89ae5d0f18120fa1f1461fe8650a8f3efd7d656e7e3ed328c62. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:18Z), 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/FR2X42595214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088463a8a959cede19231f482dc32cfc6aaabc999a583984bee6af543ee66078. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X42595215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6be0c6c14ddb9341d2d0a96c36edee37a90616f75b605ec3c15539839e7dba. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X42595220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118f4c6a4aa1f2e75717759179177a3a9ef7d52078ebac3202383262732a8079. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DGA0R2492142.