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 0x033c027b2748dd2015b72f00d364033b6490f8ae1c0e76f32e61cfc18d81590b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb4dc52a-208b-4d3f-826d-70dbf8b32ec1.json and https://artists.proofprofile.net/proofs/artist/eb4dc52a-208b-4d3f-826d-70dbf8b32ec1.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 0xbc34aa93af0e5c60233a91ee81f6a9ced95934c594dfdab209cf0d7c82102a90. 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/US7VG2014756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdfa06547caea3b95c244bd25fe544977744aa21bf2ba9317956daf5d0d9cf5. 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/BXKG22000175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91473cfcb90b134c69cd398978e09027363cc3a58c6381606e3cc79907a4d79f. 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/BXKG22000145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b2a7a765c962ce240f03531dcabaec14b7623b91ff32bea30db61cede1ed08. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/BXKG22000174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07576620d34428ba18319e79c1e885262d81c9260098325c54b2373a313d0c45. 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/BXKG22000398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d236a9ecb9e1cb9e3ccf5d7347bc5346fc0311ff8064dea14185106480c99d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZMZ92169325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf304cb8bcfd92a1ae9a00a2ee73fa092262b0f65bd97daa20372579b20128298. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZ5AB2293932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b8051b764946dc3d2fe3c731966ca12a175773f018f009bb59014689911e75. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHZ42260504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea10c0896dd6db6bc818cd2defd56cd2928b9ecfbc432185741fba2b8b2b738. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZHZ42278295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2693c8337198c1f6c7edc2e1a180cc46afa13a39c4578b1e4888270a474e8c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMZ92220550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9e176c77988fcd56af1bfb140306f995d93887fb8dd4e5b8c3f30453d9dcf3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BXKG22200859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc1d435d4180c9ea10e5b058633bd81470b202905a552213e15b563dc20b35b. 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/BXKG22200858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6b419665ce98d4cc6f039ff6331e99bca40e880c6ab0726d384339db7f7237. 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/QZW9M2278651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40524e347335e810002c4816c039d95d97997ce4bf8889ee43d4f2784241bbd1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJZ2308556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce8ffffe17fb022cb38a06a1fcafd90f2eaa50e287117c54617d23c985e9904. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZW9K2310633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f51222570ec7ba82ee4dbe0590fdb89a5b61667980a7ab475e0d53dd3b2c73. 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/QZW9K2385526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264cd79b0fdc0493f5aadca96cacbc7cd9535612abbd5b4f1296bb8dac13780d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BXKPP2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed852ee4af800ccb85421ce72d416ba0acc698421fe675fee33205447aeec26. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZNJV2427299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4c3938d8dc550fc1bf7fc68ee08d79fb7b2f512d16937251dc7d8d2ab233dc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJW2451861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004f7f34d71678745bbe858a9ac7131d374f8733134982df9ea8e5a69e7eddd1. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZNJZ2405544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c667a095b1ed0ec41abf2e8848a78bde5354f5f861194221842c7d9bbfc0e2. 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/GXBAV2561930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2cd5d35c63a17912c512e6b83f937d4fafc6770540dc36ad1a6e1550c3c0c0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZNJW2574421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cc2057075bde185d57e83e9da1b786963d9fbe1e2c624cb4509fd3d656c404. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ILTON2507072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee009d56887bea204cd0e552671f9932cad97c7cb37b3fa1216faaad7e3c1c5e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/ILTON2507073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9a685f8b1e0a7d34714b3a5b1e14a950086ea2583b8f41b00e178b47b30a32. 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/ILTON2507074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a193e5af29601cc345daac72a56a3d37fac4f1d1c02479faa09a26074f913ff. 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/ILTON2507075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c96fbe091d8b217457f32cb44911ab3ad10de0cfd7986a131bc3a49b2eda1e. 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/ILTON2507076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1adc48c95d2e037a91d36d7cb2f63d72c33190d8cc820ec63b93595db86d8e6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/ILTON2507077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11670258fb9395f553a196f712389f2beb29521553d1a61f1bb3e0982125fc. 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/QZTPX2442890.