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 0xf04e74c7ddaff39ad4ba5bfdf9c5e65948741eaf0a70b84bc3b4a131b9b8a769. 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/89a3c29d-18ca-4d26-9f2c-76a5878f06a4.json and https://artists.proofprofile.net/proofs/artist/89a3c29d-18ca-4d26-9f2c-76a5878f06a4.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 0xd8988b08db08d95fc28eb43cca7961b24bd8e0eaaff6c69d8157635d591262b5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6H2298493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568cd0ddf876d7cbfbe85625737906576386648eb10fa144af85240aff4c306b. 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/CA5KR2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58a2b8c19db04cb3b65516a313fdc0050f92724340e9aed1074a777fa1cb06d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CA5KR2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68309b258c1400b19f8ee065a39cf49f7db5b768e85388041badd3a730983748. 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/GB7YL2100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdff72a1b23432518bbd1ff3ae0b3687c0fd25af57f1f75341b69d467af38da9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2408067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeca9cf5d38306dfe340fc1f8f32aa83dc089b7657aac8506e2ee62fc930e7a4. 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/QZNWY2425449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b71b43a1c2f11f28617b17f4fc6a5288a9e8fea5a713e6d7d31bd7c8ffe846. 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/GBWUL1944025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaba173af8118051f50b7a6d0ea0dda7b5a292304b73b80bee35696a431b10f9. 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/CA5KR2011176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cb26ada5572508bcc65e32fb92cffd3d2591ab1a40dfed8e61b8c5bf903744. 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/CA5KR1838567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047748763dee29ffafdeeb3a708cc78d1c2b34fb7058ad816b676aebcd48b3dc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB7YL2000189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88ef157a81c2de8d490c4c27971fb64359a6e518b89000873cffc03e53e69cd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB7YL2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5adce08eb44ba280e039e849bf18f54fe11f48e5416766122cf4568601ac43. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2445985.