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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 0xa9496fa105c7fa65459e298615ced45f245ad753b6fa41d194c79168f678f59b. 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/080567eb-4409-4260-a119-22be21bb3d68.json and https://artists.proofprofile.net/proofs/artist/080567eb-4409-4260-a119-22be21bb3d68.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 0x4451c3a1421f1de5daf508169f95d010d7c5d4cb1add19a62f83b617f855e553. 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/MXF060200329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3d26aaaeb68e9343327e3b11f643d9851d314cbb07d9c8dbd9fa0863d9dfe3. 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/USEL10300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59530015387553f96ba0412500250aeb28a55b765f4e4b799ad43d8c0a65c7d. 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/ES5110304435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95ea867d76f2e964bb843132e5cd1b18dd10f314da0e934f8bc15c8b98efe93. 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/USSM11401722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef8730ea6319784f1ca1f692bca39356cc0a51b56e6e9f6794dbd0b34060f2b. 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/CAOA82100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef8730ea6319784f1ca1f692bca39356cc0a51b56e6e9f6794dbd0b34060f2b. 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/CAOA82100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2b2c9c4a30b32cacc6df8f5a30f21a2bafa287ef30501b9cd456675a4385e6. 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/USA2P1809220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9710450d8a22d00104083e3e9e028eb29b0cbef6edd5f097f75174653cd0cc. 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/USA2P1809207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0330ccc1ad905d76cc8ff27604066ec397a87c7197c6702dc8a9cfc63376b094. 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/USA2P1809210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c4cf769a6e725dbec10a7bda0902209c1798d10d9fc5d0d02527a85b9d5b52. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USBL10101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb6691247feee0a1b9b60a81594115b3114459298cda8e0dea73ddbb14c5fe6. 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/USBL10101071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de26f104b162e67a2d96a7b831d50f534810cc4fd713b007d853fa203288565. 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/USBL10101069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ade4ba87511a444ebf0b1c40f0b9b4246d5c63b1ef90a39d5da27674179cfa. 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/TCAEW2095391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761a3fadc29237d2bc552522b38a2d2d1c58f43e9e917a3965b26c94b1ea4d8e. 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/TCAEW2095392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8930db7fdc2f6dc10fa38bcfc336b28aeb0d6752d85f0828a7ab8112ebf667e6. 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/TCAEW2094499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f1d883a82debac48c52c7d097bc830bbce67ece9d5dc26bb01541392a98f7. 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/TCAEW2094502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce453a47661338e063e9cbff68ecc7faf7923fc83230f2b989ba96b38fedabc. 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/TCAEW2094504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7bf37d062d46a6b12c2fcdf3c3281e39a1df2511cd9c63dc11856afbf84484. 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/MX1082500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc042006ed303e990548d80db0b3de17ef3d6ea4d371a37810099cd153b2ceeee. 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/MX1082300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2003698626632268df96277b3acb344bc5d529ff1ff0afc7b2505ac7961b87ff. 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/MX1082200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9efe76c768304e425bb799b74cd7c6cc4ff620af03a3f3e22c1916f9db3fd2. 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/MX2332401550.