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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f412de131d240d08336c7c06b0c690c9b424458220e9aa6f5f3380172ca48c. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d45df75-5eed-4a22-9122-84685fd15e0c.json and https://artists.proofprofile.net/proofs/artist/7d45df75-5eed-4a22-9122-84685fd15e0c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa543e88b926b2e2461b0c1044d160d15e8ea8afdbfedee1d1830a08575cc3976. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA0H2314503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc2a8c481acbf9a068e402c287c7865f9ba291e7afefeccf140b31320cd0eeb. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FR2X42371416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19eb6b7ee1a2794dd64ee44477138190b4aa44cfe4b0d7db17cc9a1ea4a9597a. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/HKG732253050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0a2f931dd1a9469ca0ab5b6030556d16563cfb5ebb5f79802ab0a297a60b1e. 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/HKG731751454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01f3ec64316b47905106bb400452aabadeb831396489c1c0fbbe7884a9eb57f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG731861822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd3333e56796deb6b423dc76b98359f3a81db157e42b50e5201471d8c281641. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/HKG732122049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca2bbde16dd2485b5451484cc1f06b5dd14f4f1d1497ae53d9f926d910f94d5. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HKG732146175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d61e374c9bab8fe4dbe61dea08fab1e3c49f4690e401b08bcc69da44c0e7d26. 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/HKG732129394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c2279fce173ef75b387ce56cbffc79560168a068f20ba906ea44b648b400fd. 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/HKG732128143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ccf9f06f32d3476a3798491e234e4ecd369b7f04dd82ca45bad40b32fe4dbd. 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/HKG732127905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ebf23a1b1b604358684c3d104257c138514f8dd19baf1e62e7cd8e0a110efa. 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/HKG732141664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9c9c5761299d429d6a1094a492fcfdb7c3b6faae31ec373c6e75160f62a721. 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/HKG732114657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f31cd774870dfdce758c2bce711363771e7b19af5747e9dd80d3b041a993b7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/HKG732113626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446559e21642c7667c170facba12bc1f93251aabf12bb0be5414835f229fdfac. 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/HKG732106221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e939ffbb9c5f71ed41448530d3ace5a4324ee4b23e21b09b9f75eeb9778727. 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/HKG732116867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3402c064d2a590b5376aaac273a0444f228c0d36a9a705f33197be46fbbbb6a3. 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/HKG732102544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaed5ae77bc76c8e865fadc3e070d69aea2d84dfb9848e5ef10e2a098afb9c1. 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/HKG732100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5caa808f3184c4d64fa2e2c23232ce6ca9906d0be84fd2cd18f387ae58aaf5. 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/HKG732030034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47fcccc64a20ef44975098ed6957e23211a4a9685cfc3f8ac3cf7bc543e756. 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/HKG732026718.