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 0xa11e66dcf4ea245405ac3d3db900298d945aa790049427d2d478f3f8c4797d4a. 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/395f43ce-957a-44e4-9559-7e2bb0f1dad9.json and https://artists.proofprofile.net/proofs/artist/395f43ce-957a-44e4-9559-7e2bb0f1dad9.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 0xb043ab87bead604471fd87cf8538ee132933937a9be0b8199b458337da0be208. 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/FIEXC1400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e0c4a9fba6d61e7f664f316417e61015c30506ffe5222118c32667b239b386. 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/FIEXC1400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c8af535b2a9cd3a3a1970c7477484bf50cdd12054c29881ad783478b206c5c. 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/FIEXC1400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdca14c160f8d7c1d1bbc581278c0912beb9597105ba05f65748716364a8128. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/FIEXC1400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0262be7def8cc16c9513ac6688737bfa4a55cad1e1d61a3feeab88e305fa15. 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/FIEXC1400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda3676fe4fc701ddc5b197d0e3ffe10db72918fa4b4b40d9c451ae4ae3939c3. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:02:02Z), 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/FIEXC1400061.
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 0x8451cb986ef0c6c92baafc17a8f4dae90cecc59339911207bdefc041b8faaad8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:10:29Z), 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/FIEXC1400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac96860414e806b9130eb3be30549568fe2098e8ece4feeb927379ea2a16d17. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/FIEXC1400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55baa55918a65ca9506bdbbfc8c0dccb91a421f1891100a5d7fe0a920b897672. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FIEXC1400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd505e094dd3040d0c0854855317e235e2bfdd390fc4e1ab231293e833ecfc1bd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FIEXC1400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f1ba111b201b55edc01887fe9b0d62bb01778f4a6aff13ed6a6bed9bab8929. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FIEXC1400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fafb726134e73e32a64c4a460b7f48c6cfcb8cfa969d69bebd400c92e20e07b. 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/FIEFE0700467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd506340d220d3e77cd800ea62a1857a2e5e066f1dbff33aa862b4a669f2ba681. 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/FIEFE0800215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a057208ce8b320d373a89b7fd77e0f07afd38aee83df22235118f0a81aa926. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FIEXC1300020.