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 0xf07d46901a2a9ce60f09dec22ba3c9a6f426100246802aa82f78f0464cd5ef22. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5a3ab76-cc8f-4d09-a5a2-041efa292207.json and https://artists.proofprofile.net/proofs/artist/f5a3ab76-cc8f-4d09-a5a2-041efa292207.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 0xb10499a2f1759b2903da60499574139ac296f3da95ac268024ffac1ff5210bce. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/ATR981209712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64b518acce6a9e197cd21947dbac9d4d89bdd9a0eae8d44906b115950b57ea2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:38:34Z), 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/QZKRL2000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165e4ae3604c882b4235f17df0814ef3cf4d3b3a24e6a10d133995d50ccffd05. 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/ATR981210540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a491076be872abc64e67d32d9c55ea708c92dd7f313960d96265c9642687b65. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/ATR981213770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d09c6158a22a3abe9c7df4b16b7a4ebe9e91fbb9a8e14b13c2db6b9a62bc32. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:06Z), 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/ATR981215223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ffb7e156337910690eb8c0ea78cc10c57c79860152d7059a1a2710a4356381. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATR981222803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4de0405a62c6adf3962b843587e83c2363b5aeed8cc4761af479ef9a05eae77. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ATR981224276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d6a0cb9d3d4ef9c2d2c7328dbed5c29cf238be3419c13356bfc204dc66aa1e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:00:36Z), 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/ATR981235234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c7e70e1f5496bc31b3e858d14065a0ca3a9fc73872bd59077a0c199f169062. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATR981239299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517641d20b9204005331046b48d3a2cc399391b4684762e5d4174027a11f3cd9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZKRL2100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0531c70d814111fb40bc0407a82656864640e113530d78f4834fb8fb0c0cb066. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:08:56Z), 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/ATR981261456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc06cd17db844b28177ac52e4a68bc83a08b409ea72e7ab602e28ba854449456. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/ATR981264978.
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