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 0xc6f1844cb6bb322b8a76f25cdafefba47251ffc53905dbf7712550b0ea168996. 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/e5138e30-f612-4f0b-845d-272ebc3febd4.json and https://artists.proofprofile.net/proofs/artist/e5138e30-f612-4f0b-845d-272ebc3febd4.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 0x4b77068a987013588e54815549a7e81ddd0174d595e14bae318f39008516538a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMWZB1810747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b4e95151bb2cfbffd7cfa807555280fc6f0f60b58e624732787f9601ea9c7a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/GBSMU8516543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8adaba6df893712f5dc6cd1e9907d8622ae8c270b3b323d5f4981e57ceedcd. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/BXHBP1900638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d338431939b6984e22dc24b6ead0e027211a1082f126a72e1dc7affd87bc9a. 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/DEXO52065502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897e65846956932249a4b34501e60f2a1e80fa0fb47a14d94a44891da843429f. 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/DE1A12193261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d757e0b97fe24f2a8826a54b0ebb7d2e9315392a51766d5b90383c324d88d3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DE1A42124749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13242c1ee7d5b59812e568a181bc42e9777ee8e425406311fdcbb726af8bfcf. 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/DEN062101410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c6f24a7fd413d1720834170e1e3353c8d57d271af4d14c080da324b6e3638d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITV952200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791ecfed426bcc65209e27b47ede69557bf8971f4298c879d2f5e7d460a46b0b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/DEN062200614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe583cbbe16e3c6a957c8de92a35b160f7da9a1142858dbbbcc3120a31c32d85. 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/DEN062300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb0a30db812926b9caf07e7efce62f5779c73e694b777d041e5ee56d10b29e. 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/QZTGW2400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66cf1cba3321b7915ca74e0c0c28ec1fdea38d31b47fde9396cca26e54e218d. 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/DEZC62572456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cbed07136e1ae2bb95ea12bdaa84534a9b99bdef8610c6732f3a650e060b9c. 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/DEZC62576166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53552c39016517e6522f34586e9e623ec3f5ca93a5fe4edf7026faf39b00b901. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEZC62597003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90409e268f35924acc0c47dcb20da96360a9f31a2b68ffc333e0308f22ad9e8. 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/DEZC62597004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e10dfeb954e17de531ee1015ea1f315c8d8d1226203f146663de1fa49a91d8. 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/DEZC62597005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb06e3a8c2212134525a1e0a91e35f36c09959b2ba8b4b7ed251c04e713f4f2. 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/BE5KW2300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcf500cd06d4dcd58d0560512177b55ecaac470096d7e39af576890ca08d58f. 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/DEN062201220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83c3ff49af5de9372070b16c956652c04d7e9b32331d65e5c810b5c222c40d4. 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/DK4YA2400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838eccf0fec05107374dd2e393ede94c370c647a225e2d44c6139b04c387a1d0. 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/CA5KR2095067.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b2f2dec788f751533c04306a7e62098db95a8af3c30098edd8ae55388b56ce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEN062200290.