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 0xe4637e49c39ec414e0686d45771d65cb76ba9cbbd07cd0724a43f0602b15522b. 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/d5ba0643-a267-4e76-995a-5895ad87f41d.json and https://artists.proofprofile.net/proofs/artist/d5ba0643-a267-4e76-995a-5895ad87f41d.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 0x6d27237ac4e1fb9665180c5c52bd19619e314269bf34df1d10b8a3a27586eca5. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZHN42077947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07438f142079dad37af013038fb3af3aff2c884c4a978be27becf1249f34a8d8. 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/QZTB62301466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e9b4526b2730cc7ce39eaaea961c7942d2c79d0124c371b72de8d1e248548a. 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/TCAFF2050540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14d1408656224cd3bb87c1ad1e22b33d55f8596f23b19d86aaced1d34bac6af. 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/TCAFL2179032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a243f6d2aa4af77fa28ebe3a98440d3f871c58f1a60a09e95dfc5a7b669d0e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFL2179038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54282628c90e6469fb7ffc97b156930e0ea2e978fb18bc61e7f4d460d24e1a24. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFL2179082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a469969f69e3ac83114b748c18c167ffda26b65441d0846d285dea0a5a25db5. 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/TCAFL2179090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6299892d4fe23091e66d51bbf2a9d338e61ce512863af4615371b049bd9284b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFL2183948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d658743ec4f0711aa463f468ee08ca7f25dc296dc322ee2ce08921d30e8fe3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFL2183990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c08ba35413549ec941f57757c13fa048a0d29b08c5a4be08c8841f2595a275a. 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/TCAFL2184041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf740b5d9d637d55a6b5b0acb23194596cc7264d427ba5b7b1fcdbadcb66cf07f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAFL2184086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19a523c0baaeecc46393f616528b83f7d1f2309e67b5ea85f5b1405167bcf0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFL2184148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33dfbdbd4a9f357ae0e014ef3ce7a1067bebbe4a39bb8064bf5dded49f35f6a. 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/TCAFL2184192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040cd49b248c01a2196f19efcdc0dd6191fff7fee8f84c92acd7f7dceab67c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFA2076372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc732889bd59091d4b2a203dc5f3eab991494faf254711b2937572524777c4446. 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/QZPLS2248933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b535a2311324704e5bfe33b7cd3f7ed9e1b41a0346a6aeb10d7a4f87557bea2. 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/TCAHS2361826.