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 0x111909c9e0961364e6f6058ca27cb4e857380839ebeb55ee4ea0535774ab7050. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3388a2fe-ed85-467a-8c6e-721fee2b01d7.json and https://artists.proofprofile.net/proofs/artist/3388a2fe-ed85-467a-8c6e-721fee2b01d7.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 0xd0a10662b6bc9f719217862a4ffeebb0578317d9ec028611dcf93c8c04de471e. 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/HKC630300493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedd3663f2e40b89b55d77a0248ae42f544d7612417dc7d311ebffb6e327f620. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:16:37Z), 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/HKC630401138.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa106cfea50c2378b32d8862048835ad5f95dffc4bd9fd5c88c44741c79f5d01a. 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/HKC630480250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f2ad9756011fe97176a4653cf41fb3814a14ed68c1403ea9d8007d566598a6. 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/HKC630802437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226663a3268a04403a306c959a6f5e40349ab47584b05fefcc5b9b1c4b8610b6. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/HKC630802460.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a32013944323e19650f1b27e3bf500408440f36aa1206b6b37aaaee0e205555. 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/MYLR11422235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef6939d808d1aacb3b598a943179c9bb1fa9f4dc0785aeb3b04ee14c6bdbe64. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:57Z), 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/MYLR11422284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca74731f1d306c8786aa013f12d821fe9e63d0d31f965ef1d612d3221d0101d. 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/MYLR11422294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8881e69ec78193727dc60a3b68248f3736c9550d4bdb72236f092d0db148a5d6. 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/MYLR11422182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb253c723916058026d52027cf3679c64c469264758a1f5e4ed8b48c179275b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:18:48Z), 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/HKC639823007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dba1cc5a37e402a2d6486a146ed980c6c9edd31e5d9e19e104a3768d248af3c. 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/MYLR11422174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bae069e0ad82f74504afb57ae45539c7fc9f06d6dad7429e7fc2316e0090585. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:52:31Z), 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/MYLR11422176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dbaa53cca19f2aed334a2ef9384ca1f472e268e3164d2b9562e80bf4d6c876. 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/MYLR10820084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c19d330d94f3ba16e3a49fd8c17c828de979c539959e2c8d1a5f133e2776a8. 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/MYLR10820091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee171565e8073ebd12733f071433bba5b6c71ab95196a3b48e9bd7939bcbcb04. 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/MYLR11427038.
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