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 0x2719eed2f7832c568db8f14bb683fea92d17e47fb18b2f3ad974c1dfc252df45. 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/2142f146-5427-4a3c-9957-183bbb247625.json and https://artists.proofprofile.net/proofs/artist/2142f146-5427-4a3c-9957-183bbb247625.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 0x9f0fe6a7d1a72e70820d7ad3d0b08e92263e3b5813141af380697653f00bbeaf. 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/HKG732311849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b35c0c31ab27f510f5e042119acb5a5690333756f40a6de13cae5dbf0a2375f. 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/HKG732155886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37abc992d570fa5b9edff8de4797cd996948a19480d40c7d90d9901f1426c09c. 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/QZZ972332321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b1ac21d5059d6db0db41e4449921a11d52b2939e3f38d719e83a88c27e3649. 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/HKG732117501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e0f5d10e83290792b7dfbb250664a124c13919410df75924f20b88bd736f9d. 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/HKG732131645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab750b42966b33486c505e7e951d8ac215ddd1d137bcc2524b49eb5498407cc. 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/HKG732018919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97001b2af929c5aea4c6685b4c0f7f63a995830c285d21a9a5ae0210a3021c09. 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/HKG732017169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4ad9c19db9887baaced99bebfdfa42b36a2175af4794b60559a08310aa30dd. 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/HKG732009984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caf9aa7cf2b6f2b5726695ea4d8145dfd0aa00f7402354429ff1353e8fdc594. 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/HKG732013046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef264528845737c41498121b2f43a5590dd6c0ffc4aa09755383a8da2c4d9e. 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/HKG732009973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d2d0ad44595418abeeebcfa23d7f086fb036569b48caae210236937b1b245d. 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/HKG732012169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e299f806b2a9ede9f20664133e924506caa37a651ffbddc07826b17f597173f. 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/HKG732432921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379667d8c6753f5c18ddb59594bfbdf08505b72368a2224a24bd2a63d7fb85dc. 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/HKG732009966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbfb0ca244c0db9134f1109dd2766e27d0be460fee2de5bc07c0a8aec35eb06. 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/HKG732009964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cbb5b9d0788e1e72d98ee21d338b9439ac172062037cbb640f2376f772d5d4. 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/HKG732006254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff26cbc445222d9653726a2bd97c092057aaa26b8f2d806b57e0fae3503fafe. 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/HKG732006251.