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 0x3c05378e8ac46afe2d6dd1b9f2c9c26855abec39ec21595b368930647cfc3940. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaa1e339-a8ff-49e8-b831-d22044648417.json and https://artists.proofprofile.net/proofs/artist/eaa1e339-a8ff-49e8-b831-d22044648417.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 0x4b145bbe8dc8803bfb15c372b21104c2247650d01bc86ac199879d4c24efd79d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FR9DT2200400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd922c11bf529be023e7286f39ae99888bce31c9b76175feee82ce2af0a7d486e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR9DT2200590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3332d3c163f2fc66ff8fcde4095f93a129a9923a145beeab6417771399e50935. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9DT2200350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e68e2dd2a0bc495c8505953d1ffa36b464c85a40af79eb834e413623f3cc78. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR9DT2300160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebab766812a2d1e9ae8ce3a3a1dc023936a30c7192d78d86996598978eb96c7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9DT2300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6ec610781f2e0c5cdee3ec58155751d7a121a91debafa769dd475c0a5ea70b. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FR9DT2300190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8f493f8900839ad3181b4035a08a7620002bc3054fa54f829f9d364705aa9d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR9DT2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11929e34724218a2ebd9595c956bf1597ea5258a4f5a48825dff856c6a0783f. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/FR9DT2300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2750553bbb33a224ff25496db12e295cffb8bd44ea97faaf0aa9fe1928d74e4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:58:01Z), 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/FR9DT2300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a48f6aca606182b514d6e8576f96b091f49cac1127fda7d9d426f57f9cf9dea. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/FR9DT2300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5241aa46ae4cc19a75c8e446441050c50ec9777994825d14c0194b7bac5fe51f. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR9DT2300740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadebbaadaf974601d25e3fa9f68dcec69cc67b8afd5d56f928b9e49617dea0e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:02Z), 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/FR9DT2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9273269eeef383e68e32c245fd670106372fed043102f27b2a89d85771356b9a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BEGL52500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3251962af15f4a392cc7e5283ea9a2973b1b7f9cb554b36471333ed45caf8e42. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BEGL52500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede29bb620e6ca76cf1e42aaf3ac513568922ea1df825de75df71580fa62143d. 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/FRECK2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6d21c0e8cf47225db085fc0edddb5c0071e444533f150e60678a2caac6f82d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAHM2349208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543325781ab15c134099b3a56b47aa1c039c599f7dc30b12641da7fb58c5b9cb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX852205610.
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