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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 0x55dc7932c918750813a07db8d61eabe79933830c896838cf875a91bc7610624e. 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/32fc5e1f-f91b-44cd-a6e0-1286449be128.json and https://artists.proofprofile.net/proofs/artist/32fc5e1f-f91b-44cd-a6e0-1286449be128.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 0xb5c751df8c7dbd0e29082595c65064e85a3e05a2c30d722486ee4b8b96407a60. 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/NL1LU2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc071017ee2ec5071f921118de5e75d26fc46b5a789599b8ef625af3ff79bfdec. 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/NL1LU2300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f9461d42365f9348e2f9ebf047941f38eb7edb0f73a8b641ad6d823fefaec4. 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/NL1LU2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb3e6c93f9995cf8b93e8e9d8a2a744958d438fdbcc07b0a683980991923de. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL1LU2300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02fd70cdcd8f3886642bdc964092bb8a1e0e02b3f9715c6affc1cdaa77cc192. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NL1LU2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cea4f8c354b05b742435f0facc2a52e380e7fefb2bf40eff9c0cbd88cd183a. 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/NL1LU2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0693b1545f8394d325183372994e5592d521a0f1995830e69ff1ad6ddbc1ffc. 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/TCAIQ2450721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed122ab42f9f43bb4b0c52c99d9f88a4421a0bda13d289fe7823f4a9995eca87. 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/TCAIO2406054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90aa58f09b12e2f4020849fa004c21c0700ad2116873e56c545fe6dbedb6e200. 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/QZMEQ2483583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb61066d0ef007c2df72835bf27c0611b2d6e9b2a2117243c9fdb16216599c8d. 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/TCAIG2427238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53021935e2b02fdd9c12d23008a3d3cb2d095b4a8fe1c0a33452e0fde2792b7. 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/GX3Q92490579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0bf954533d55ff794d7782a0b49ed8100ab7c5bc92b9c231f9c6823b3197cf. 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/UKZGC2401655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00c5133de2db08c7484d681ada6cc7427c9a66d767cf0fb6824685b3d4c4914. 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/TCAHU2400739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc067c8ef8ce401038cf2cdaea72c52b9a98a2401f3dfccf370747f7dd0f5e5f4. 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/QZWFH2329931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa15560abfa3fdbf33d720b664357b0c5c0e2f13c092190359fd43b4815d69b. 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/TCAHP2367950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ffd79db88a0ddead10e5299c85a842ac1011ff3c3c8468ab2b6e5f41587df. 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/TCAHN2389342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bb303e6c719849a4f2f60bb79acedb79a535dda0f85d9b18e6ef517d0b856c. 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/DEH742323763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689a9bab9d176af8ad1a12ccb932127454b7b5bcfec281fdbddb14adf7d72eba. 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/NLRD52222380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d58c0e3276fb51a026c52339a55e560d6e14b268c7925170663d9acaaa4bc8. 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/QMFMF2224879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c7ed8a0940c040c1f54bf32ac4800c9f3db6492bd25ce62bd3eaa4412f229d. 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/QMFMF2224880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ef2d7ffe1ec7c98c2399a7ebab9ba03ddd380970540fd8bfdaf05b3c6f070c. 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/QMFMF2224882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d76d55c4fa9ef392bfe9141a33274776ef87fbc2775b33602c6a8477bd53c9d. 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/QMFMF2224893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c9ab1168e7595111671f1613f38f7a77ecab5a713bc1caccec49eefb99270. 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/QMFME2219623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f48c554f983ba37c1da61a5d27400d5827b049ca6613a4f922664cbc6fde79a. 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/QMFME2219629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fcc74f98bd00fb89b5f757f02e33854c390907b7bb5bcbec6de2a72db25992. 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/QMFME2219630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b02cba89b2d5cec632e0dbe0d367f21eeffa990e28253c6240d6cc62ce38b4. 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/QMFME2219631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587e308fe055caef3840ad7d45c402e82c1fbea4769cc4c2b40f81f3434b52de. 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/QMFME2219633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcb5cb09818d1ce5b4309f719e2c4ed3f0825dc2369c93c819b0e23c4c67636. 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/QMFME2219635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281fb68a4ea2085eb4fc422101d4c2de62bd43a4d303e76aa0d1cf54833b9ce8. 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/TCAJK2540368.