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 0x05b06963d98419df3a0ee2d121fbff1414f230f7b15d2f97608e21648e48f689. 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/d2705e0f-7966-47e5-90f0-d0d4e030a76e.json and https://artists.proofprofile.net/proofs/artist/d2705e0f-7966-47e5-90f0-d0d4e030a76e.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 0x7b610e5648fbbdeeb0e32feed710dc33476187a491986b884fd65c6ed0080e35. 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/ES64E2404806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce81ab8ecab650c0cc32408d440ea0f529c4fdb34e1be12465c06a66f4278e9f. 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/ES64E2404807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be51672ce571d8240c0839c6ce4fbdd178e5eda60e3e74dfc5dc0d8f179daab. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES64E2404809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85dad7d32dc625bf410ba7fa34295e58ee6364fa9d01dbe23f150c18185f583. 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/QM4TX2283331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4354335a265beb721d1d850ae8e0694faeb4bb83b727c3765a97e460bdde5f42. 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/BK4DA2456226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd94d9fc55380f833fb770ffe71c61728dfbfa074acd43a3e97f267f526645ed. 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/UYB824371708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7764f5c050e6f74b33fe73cedf4f824fcadcaf882cdba407dde26f81c9339d. 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/BK4DA2503360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ed7fb676c3c0c6291999ac538a50d49b74c53103e0504f4574c1434baeab65. 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/BK4DA2464588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c75b8b724ffe609cdc528601deacb4a2f97250aec28dcee590e2205bd6ad7f8. 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/BK4DA2503362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe489c2dd48a142f836f26bcd6d736b0d18009d5cb266f3ee9ee2509703f06915. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2503363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20d7c2a17221fff7bd5f8649dfb1615d96bb26fc42d60e9c2d5d3a88891d567. 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/BK4DA2503364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa65bc07386b186d3198af38159d69944f17bdbbaeb9e0acdab23a72f630655. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2503365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab209aec0cb7a9f026c46fa55bb08dd082a826cfa3357752a083473b99b205f3. 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/BK4DA2503367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e900e497e621ea069594797ebb74d547eb5be34fa9c49713e4078492f33d84. 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/BK4DA2503368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2c9cb9629f96a61fbe7036434bceeb9ae7acb7fb3a3adab5ffb252f24a0f3a. 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/BK4DA2503370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdbc75416691d5f694e3e46f1d7e40213c360105e8311e998d6c590015f5b85. 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/BK4DA2503372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6f63cd94c3eb8652a76920df1ab0a8523fb0cb49f623148da78eb07917f0d2. 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/BK4DA2503373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758b5d91e9d4c6381a31ffcd581f92337c83d4b5bdd1597de0406546df78bf9a. 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/BK4DA2501033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f5f3a05e90868cf101ff4bf4b573908e73d31e2a848bee3e310b4e5d9b5ea7. 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/BK4DA2503374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43143b8cc46b3ef79fb709ee710177c839b2692fc87ff6341477501b29011e0. 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/UYB282381018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6506d3fd8db207ca29d3255f46e20399f7511794edba1fbaa60e5dfb93d5d080. 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/BK4DA2503378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e900e497e621ea069594797ebb74d547eb5be34fa9c49713e4078492f33d84. 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/BK4DA2503368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab209aec0cb7a9f026c46fa55bb08dd082a826cfa3357752a083473b99b205f3. 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/BK4DA2503367.