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 0xa228ff5bafcbc54ad9ad3cb08cadcb5d6f5c4dedefdde481febad0e8882a777d. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50d35b4f-1555-4419-9896-fe88035fdd3e.json and https://artists.proofprofile.net/proofs/artist/50d35b4f-1555-4419-9896-fe88035fdd3e.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 0xd02791ca1d877b90aed70e59236de27ed48d4dc33028c7ce85a85d7d1ee02317. 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/QZFZ32337075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e396024d1a9987b11a3b7ea656d77f7cc0517ede030f010b4005377c88e8e11. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAY2383400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76a92b6eb4f7f26b550943447e7f313e48a971e791972597195199cea62807b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZTB32253155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625e5df7f09da2139ae5caf852885e4ff8045e597587a41c44778d536fcd43ea. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2209877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f49e1a6da99a8391b34635bc912bf34b4bf8e4ed3fc26c05da42a781886c107. 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/QZDA72206808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc87687ba4cfb422f7cf527dad6cd4980ecaa915fc01bdb3e872bb432a4b6cfb. 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/QZRP42138535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd417923a575b77b7c7265ed08be84869bb1931b82561fd62f5d98c2571b9a345. 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/TCAHA2382058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a96681684526e8233966987897f4df4341785713c802b012e74d58e1d5c0e86. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UKW3Z2300999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428563149a1651eacbc86d6f89c898cfbceb74aa27039ea2bd2f6b6171344142. 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/QZHN72389150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eed0eae2054cd7a1fcc516a0e03653678e4acba7357dc6796199384a046021. 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/QZDA62346832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349ab54fd2ee144c2d550ec3a86c7853bf941a355336868040a124f6701f77d0. 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/QZS7J2284417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82e98b5e3e62e52686ea2f1e632fbeea757be2ef0028e322e49a3be079086c5. 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/USL4Q2292837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3413e907ba770782b91f58d6f12923d00bec1fd20a72df5dd22e3c3a9e26d6d7. 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/DEPI82213341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4b5d6ea280428790ff628859903530e0a30012e2045d2b1b01b38aadd0d45a. 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/CAZ0E2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb082949e98038d03064fce2ce1b5fec27b79ca8588c07220ca493edef7f0ce4. 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/DEPI82307644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877c62a95e9a196d3cf0437dcd9ff6daaaf65c228b95f45b2b208096dae414cd. 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/QZTAZ2355103.