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 0x51f389c001913c62fb194f5dc979054708e8f4696432a3ad3c125849902b4f32. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/944a5291-7639-4b7c-9e21-dffba87114eb.json and https://artists.proofprofile.net/proofs/artist/944a5291-7639-4b7c-9e21-dffba87114eb.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 0x206b1fc0a7bca3d901f24abd9fd8826ae8f18980714d66d1e1cfca2f934c62cc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGLS2347892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b026e16fd3175c8876cbd4bf5cb50ecbf956a1328404426b45ebbc9946dccc. 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/QZNJW2343016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e4ba85b8c1475404e90eee821ec110d1f27d468723b66e40b41b3c311603d8. 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/QZTVM2307240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db821ea9a51eef9862064b4029193c453dff890fcc390b0890a8354eb78fca9. 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/GBRKQ2482353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e878f0036f7067d0ea49fb4a22e7fbdad69b51b3ca6823fb80e7c471b1ea78. 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/BKPVM2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8822fed627a7fce3d34d4c56ca88836a858365d607cb97884d375465f80388c3. 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/BXIV82339051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ca0bb00ce49a12f65d21b46b4cc57ed8b87219b53f66bc4d9d66e28e257441. 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/QZW9L2312230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64da981963ec22cc659ead865c25ea61f6d7c830d1015659b7f9181ad949896. 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/QZW9L2312233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba0fe9d0266ed83d603762cdfdcb348fe7c1e50b82cf59d57238271c78bb825. 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/QZPEW2411059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f07806ec3b68586925b7e67e187a3006aeb6bab6b12e99bc35028c0d10083e3. 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/QZZ8A2425674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae33b20dbe7cd8dc645560444290f049d0053fc88db387276667caf375441fe. 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/QZW9M2318236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa671e481de6dd96e9af219f4b20b29a363b3b318fab7b59724475ed6e1401984. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZDA52434232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e9a315a55ae173b63593f6fc8bde5a3f2bb1ea236d96bbfaeb9a4b10767d7c. 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/BRUM72400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3495b76bf85e17e15021998ab63f225c4950063c0deac927ab7e36b7a63165d9. 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/BKK082500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78153139e497c031bb171617bb3b5bcbbbd3481badfbc97a7db080cad2445c96. 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/QZWV32489959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96677a5b4243f78161a01efca9875e67f249cb24a89c2f780a946a651f88a21. 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/QZ5FN2597458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96677a5b4243f78161a01efca9875e67f249cb24a89c2f780a946a651f88a21. 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/QZ5FN2597458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa671e481de6dd96e9af219f4b20b29a363b3b318fab7b59724475ed6e1401984. 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/QZDA52434232.