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 0x62d4fa64d6405cf144d18269fe963846e6330d9892da1b6c3d19391f2e145fe1. 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/d11ccf73-e574-4ca9-b97b-15f0e488629b.json and https://artists.proofprofile.net/proofs/artist/d11ccf73-e574-4ca9-b97b-15f0e488629b.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 0x98892a9f97ee788306cbe0a8ff5f72ce0f9924e6fa72266e4283624d884c8cef. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/RUB631700324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57f4ac601088dfded7da2e50c4c8d5b44d27bc28dd9d1e011a2f4d18d777b34. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/RUB631800397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758837e6f0347bb5830d81d0fd1260d3681087ff6ee5536690228bfef3f5bb55. 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/RUB631700320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed247c3ed8da5235a305ea4dac86c6c1f8c78b6eab6b544c9a2843c5dd905bc. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/RUB631800393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cd49617b113ca6b96054d9f30f0c4f236919340e16bc4044fb91b402c49e06. 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/RUB631800458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0e1d715e5945958f09e64b3d49a6ea2dfeb36d41cd859d3abb6979e0a1ed77. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUB631800503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4d63a89ec0ff3f9b660ca8aa0ffa7223ebe00e6116975215602bfeb232a3c5. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/RUB631900528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a26491a1a0ea86a326cbda248e3c806967e741abef78f096952cb4612bff4. 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/RUB631900543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9b01b023a46f07539f66d5c96d28cb22e60b88b1aafe2c628d70f7347ed7c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUB631900596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f410b833c26f9c32d9b6748915f87c47d29c93d3fa6d3346b04962b92936ad2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUB631900631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b19f53ff87ea7716f839e3ef6b1f0236af63fb044963995220db9a65c0c0978. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/RUB631900675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711a9c78957057dc1e3e70a3e096c3f795e85b68404c1493b3b3b3fc1fccc463. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/RUB632100765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4009f101a45c092ff496e2e2a0330b392810053ff173814393cde4cf452ce6. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHZ52162838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f595330755301f4572c006138e1c962da7f20192f8b037c1d9177a96587662c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/RUAEX2216747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2105909dc9c8652fcada93e3c4b092aebf71250b16adcc694d8ef998e6db627e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUA1D2354986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7da4a0bf4cf91007c257ffe01509970f268c79e6f1bff353886cf74e4be942. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/RUAH62408329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667ccf2bdc248aae82b9650deb1e75ec4385e38e8e1890bb24d78a9d6fc01136. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUAGT2521790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e6bb21ce56b7dd2cf539affacf5c99887ef2572fe78bed5ab6ffedcc2381d6. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZNJX2564627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8654367132892f86944cdebb79e522600337d0c5a2287edf4a74057502e4d59. 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/QZNJX2564629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f4e695f81e30cfca83b5b5057faca99b287315b8c5e51032948cbc1dacec44. 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/DEW872502318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4e542d4aa6deed238d8b0a2273d50acb2d8c2fb5cae49fabd0a7dcb2ecd9e9. 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/DEW872502320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5c0e8cdc17a889e87083f8aee8889ed7bacb1b19c521e3c260e25f1cf9a3ed. 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/DEW872502319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921c4eb43be27ae9bbadd9764715fa8387fa454163b9b641897236dcf4421a0f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEW872502321.