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 0xb6d25ebbc7e116722cd4f3bd47b3497b8615867ea8fc84cbf124e968c1593d86. 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/3ae51541-e69b-40e9-96a8-15851abca980.json and https://artists.proofprofile.net/proofs/artist/3ae51541-e69b-40e9-96a8-15851abca980.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 0xf1c677c4d905bc8b78db835b4cd89c21fb0a6a81f1ce227decb84bb977f9534b. 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/US38Y2418941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0189d4c7ef0f86c2744fd0c0ddd2c97bcfc329bcd2b2515bf82740e6d33a69f. 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/US38Y2416436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2ee627427721052a5913e70a79d588d8d00ff6f1ac97e5f27f3ad3096117b. 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/US38Y2409259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955676eaea012fee4e8c9f2bbb40b49fcd80bee3f2f9fe179c6d7c860ceb88f1. 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/US38Y2409262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69dbfff365d313f2760a3b5c67acf7afb4783b43d9f0e842e927ff79eac09bb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US38Y2409263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f2d1a6e9e40022c519fa92d9817efdf3652cffec7c3ddff4a1db629357afe4. 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/US38Y2409264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b0e68800f5540017c893a5ccd425dca629c21c3e0ebd7ef0a6269289a938bc. 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/US38Y2409265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9793932edd29fd19ae54d259bc2803c2ae202d9c5e1a7a7b21a2053b0f1260. 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/FR10S2473641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bc62ab655990e077490d58a91c442b6c63c008baa376bbeb46eadf6df098a0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR10S2473642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a5e86220a246975eec1183375c17fd4a102e8c9213d8e193818a9ad5ab0539. 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/INS182300525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd36b9753d55a2c6a3434597d393ad5ae2e0f7154246214fbc630c2dac74bd75. 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/INM7X2100435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4232b33b1bd2c3e309cc86b845a3380a7a68520a0b2bdd6820322cdba7a65bed. 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/INT102300182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f243eac66947ea449852fb29742103d6e73f79eea075a96f2043a6cbcbec01. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282298729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60a3221fa75e246c54b3929e24ea1a5dd44b95d73b89627ae904663ab39e8aa. 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/INS182200644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7d7cfdf905a9827b2b171f4d9a1751879eae929c77413bcbddb39c9ee99b98. 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/FR2X42245755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068013325d79de7ec7c886b5a4919f044a87a8b62d012982ce66134b248b8c44. 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/FRX872132426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c31666b9448be89dc2d63d22e443cbf7070709c13d4a20746784f89de6b9fb6. 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/FRX202146962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933eeae5769a36394843d49c42cc9db77ba5e256b9142e1a1b4973a04be2f114. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRS182040843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302c782a8129ff6430003bd33f8e6947b7268fabdbc92860eeab9eb3f4360389. 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/FR26V2004272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6af78b244030ec6abed82c9bef4c766e2539eff5fb16b683228ce354e90588. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX202084031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eb06298f0c02030976fec4136cda9363f24d488fff4f081ab52b7bc5def284. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X2077896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329cb0509916842406ad5c0b1ca4841cdbc87a3977184931abab1f6d4a45a181. 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/QM4TX2058575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e91829f221a6ba42b7426ad4418e959cf64249bd71a702989efac56f01c4fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX452005136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a11f1e2d7453e95eec4f5a0be364aac601e91b3a3303847394cc5f4c3d3aba8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S2020724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefc6219d4267c4a0b2cf62ed4afe193a1a1c63f1422e051a225f6e71478a65c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X1978806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355b7aada702fdc68569b3a47a833d9482bd12e5487ac2fe879e31083a336c60. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X1929777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d04519fd66630d9504ee00399e0f1c93febfb7c0d5315a17c26dd4160d0622. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R1903305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6875f5fb85dd01087f2bf823d163e914f21cfd5a301d1d3b7a550e17fb9e3c01. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/INS182300356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aa655cb9641206a5da709fd3866537ed4e97c7a89615c58e078f858c1b2396. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMFME2414582.