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 0x55d27dd77286d73152df64e7709e1a10db55f07a5a4a1be1aeab30b70e923180. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ab5a928-2b2d-43c6-9afc-79ce073f9e29.json and https://artists.proofprofile.net/proofs/artist/5ab5a928-2b2d-43c6-9afc-79ce073f9e29.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 0x540ce7851a4fd3e21a3e418dc0da1b30266b85bac19eace96188faed722ef150. 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/CACEB2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9617411f7d1bced1b2bfd072579ea9d8da18b9b1ca1928daab0d11be82570abe. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/CA4772100004.
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 0x32a82df281fd4b309500950edca2f619574ddea5550d0ddadded5b2568228e73. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CA4772100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20c34b44d524bb5c069c3c1e430b762978f8a4a394aea213816e112e17f1bed. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/CA4772100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dae28ab36e15646ce50c0d16c5f129a67e04089996cd40dddc55eea7c870751. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CA4772100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adc3872e47e0d8a87833c48456b99b41edd3a64e89b6ca058961da9f70a3005. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA81K1500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3bb7d66f56c3114e6bc5b80b3f59cd556238d16b319876d5ce96b2d99605db. 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/CA81K1500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff054bf34c179e3d1bcb1647398911da04e232bfa90164033067b2ca5fd96e25. 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/CA81K1500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0a72cfd87f85c2894b80eaf792daf0f7eb7bb7d14c9e6fc7a2afb7d0b26c40. 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/CA81K1500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a2ab0f3c1c295c637ee9c47370b9598082f5b1c197a59bf1fc8ae8a945a916. 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/CA81K1500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60363949d6c79ae484dddd4acaf9792f2f7a98a888da933b55a32d29bafb368. 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/CA81K1500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a0374bee09f5fde655dfd7b00042cd99afdc185870f1dfeccd58e8a154743e. 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/CA86Y1361111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b84047d789f12d6e1835ce1abd0886b800dcb25d4af1a81907f23159093d46. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CA86Y1361114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e34473cc8f581b0b1b7b1a1d547b17d2ea901b99bc675b311d56ce9b2a208bc. 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/CA86Y1259505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88abe4c4ace6103a6aaa37911652c1404e6884a0bdaf0d5cad5755d5debc03c. 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/CA86Y1259507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d75990783e7ee51f803d85996b5620808cc199f5cbe714ea2731ff85f3530c1. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CA86Y1259508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7589de08373568002fd53e1049a6eeb4853eca1761e78e7b1c5444aa5fde764. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CA86Y1259512.