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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aca19dc79b05b481d17bb25b906cf212be35ced28abf6ad2e6f47943461f31b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd1b5efd-40d4-43e0-b42b-8092c9eddf8a.json and https://artists.proofprofile.net/proofs/artist/fd1b5efd-40d4-43e0-b42b-8092c9eddf8a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219919d2814c7c4e2bedf1be4769bc6b4b19fe237f01a482d94773ee72dcdc56. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZZ7P2410127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8528046bc0cc0a7501ca0101c192921eb1eccf462455a8afbe4206e76645bc6d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7P2410128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681dfed7cfad0aed5fd0c356c5d15e8f18acf5aa5176545656efa7253b42b8c0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7P2410131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858a4f7f873dadeb248a4b7fefafe6ace56c04694a4d9c325236892cb6ec1e9f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ7P2410132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234381a83471e458cf36397adcb1c1cb8d6466b393f3d5c491c733d1fb09fc85. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:09Z), 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/QZZ7P2410133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f76fcaa0b6270fa4330c1cbbbc37914dcfba5c41d6fff7703faa52ef61f823f. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:28:11Z), 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/QZZ7P2410135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1b7e2e058c5ced38be5ef9a1fe76260ca549bd2ca48e4b36e38661055a4d48. 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/QZZ7T2475825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c00c60a5f409af521d67ff5bc77054e21cefe35a8703753aeafddc905bdf69. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZZ7W2452347.
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