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 0x59ab714ed46319e0b463a0ff1aa22cafd26cbeb7a464b2fd1bfbdcac9c529506. 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/c044a5e1-cd1d-404e-8188-2c75cc03d158.json and https://artists.proofprofile.net/proofs/artist/c044a5e1-cd1d-404e-8188-2c75cc03d158.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x2e18ae99943fde88db49be9489b422f079905c44fd5ae4971feeee1f6a228ca5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USMC15848998.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8bb7e4351d76a3833c7fbf370b8a60a993b212e189d853cbc0beb1eb5623c4. 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/NOUM72100275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde33558c12cf1fe18047c7190413961d4b590de346bcc6de4b626366a259f080. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOUM70600521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a63394f09b91c8921de42a1331f986aefb6903e299d3f44b592c215696838fd. 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/NOUM71700439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ab314d4f21e4657a115d290512860a77160f3f2a2f99bb337df5292609d14d. 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/NOUM70600511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7275c6970b7172d023a0438d52f45cf947ccdf8995caae49242010940cd9c35. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOUM70600512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc6f7b61a219661bbe15f5a06491b07b10a596872d79d004e7c63180baf0a3a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOUM70600513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e5f147f67c6a855dac930122fe73225d20ce4d557a25b802d3eedc6ef4729e. 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/NOUM70600514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6249d53b8dce74126077a90256564bb9c5237ee4008c306bb9f7d410bb1f6b97. 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/NOUM70600515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8180b37949b5d96ded3d3730946791ef0401772a72c959f9ac06481f64afc63d. 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/NOUM70600516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491797b7ec66258be089e2c436e7b5f96d0397b6d292e0fc01d44e6a48efff1. 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/NOUM70600517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120b2aad5aebcb66a4f1a417310831e0c4082a031a74601d7aa1ac883c72ff2d. 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/NOUM70600518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b741f76a14dc6e718f70a1e472067f4724d4cc1828b4a1dbe831a48947f9bbc. 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/NOUM70600519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa6220a2e895410880ead6e3a4ce543b5030108977241ebf5ab9e9dbf01e068. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOUM70600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde33558c12cf1fe18047c7190413961d4b590de346bcc6de4b626366a259f080. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOUM70600521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b9f51f58a58bf0a601511dd5c9e08b0978d97783fab8cee21aaeb49ee8ab76. 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/NOUM70600522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11da855f1abded88c0e93ebed63f46537aa08709cbb98f8fce0d73bba91e7801. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOUM70600523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ba06770d51ce44f5e885329b97577a754c2d314c082112169c56468dc28540. 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/NOUM72000458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7347ee8a2799bc06b3b0d0461f1d8051dd1afbea03aca2c27399ba7b69b27b51. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOUM72000456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82c14d382000cfba71a0de8433c88fd6fda9e2d05e7feef6df2fc3f4d825885. 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/NOUM72000460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b44e83a8a96d007161d64458ceca9ce81f2b755b4683ad71d395d428aea8ee. 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/NOUM71400749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4dc392eab6ffdd0c4e66ab1b5e0133d989ec01491d36f22da82a39e70dfe7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOUM71602628.