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 0x34181e1d3e727c726bc524076c6d1ae9902a6353aaefc12bd62aa1d95b854c87. 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/c0140733-67dc-493f-9311-88eee6854d01.json and https://artists.proofprofile.net/proofs/artist/c0140733-67dc-493f-9311-88eee6854d01.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 0x4ff330868990ecc8bf086f977a7c3c474a40102eea7f8eac42678f7f886ce4c2. 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/TCAHP2387336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f0f72e3c01fe7aae041526f9371611b298e5cbc428a49efb1ef5b7916264d7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHN2395116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd1166984f9853d3f6f1b72ce5a4a7ee216060b1e83ae1c1a6e96fd4496f5da. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAHO2390202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9eef217eedc10ef87cd794facb17464e6501fbaffd2de1e702fcb5512660ab. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGJ2285159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a3429d82f1d7bbcad2032f3a0a56d43f96a4b2fe712778693df1d9cdfcd3b3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGP2251652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8841f1cf2d77188cf9ed3aeeaf1d9e134a8d33798eb4bc7f4c49b68d19a55a50. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAHH2384803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc068f61caf836b36bd4b764a82880d27f0d161624faf605f257b9e7e5e8f1373. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAHH2367124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26366ad9cdf092232e21abc552f9c4b3f9e0b855ea740be84fffede382afcb5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHL2388681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fdc1255b544715e1960bfba22004f1542a09715059f83749874db1f0d39222. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHO2348985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805deb6698c9d129dddc63c3ea0f0484ae2d7ce4672fb5cffce4329882c6ddba. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAIA2452102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb837b925aa5c9d4cc1911e0c55e70a00833945d1cbb2c65e09ff9279c8b83e1c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAID2443948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43023d0f18c8628ace6c1164c6ef0d240160b04e8e5fe8a1454ed28f073041c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIF2472718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd370b9e103069c8f0a4c78902c0c2dcca8052ee3e7de9103b331547f5e241a. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TCAIN2467321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9151a17257d8a1d37ee6eed51f650922d7da5e66f58e28754ea5b38693dfdd6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIP2495780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c89b859dc6efbd91c14fe4603567f1d9a1d3e3d949460471451517e3c8fc86. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIQ2433199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d0dee474aa31ae7cbce702437a314c649293cac6a9f7200a337cf7df4c473c. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAJK2541835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6188010d3a203b41aa730f13c81b07656c8bd70801ca2715f065f0addc605b4f. 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/TCAJN2586663.
Took Sum Time (Shoutout Tylil and Preacher Quis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c59245e60999b38d1c142c479d0ff9ed8887075435db8fb47ee1c949d5ee85. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/TCAJS2597093.