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 0xf5f5cb8ac346a192e2d98fe9fe74d6408c1e45cbe29b01f6296299fcbc024355. 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/d95f8a8d-9b81-49c0-88a7-bd64a408d00f.json and https://artists.proofprofile.net/proofs/artist/d95f8a8d-9b81-49c0-88a7-bd64a408d00f.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 0xb03c22a8f6ed1389104f1466a1e709735aa70df4199cfae565f383878210fc02. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USAT22003204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03c22a8f6ed1389104f1466a1e709735aa70df4199cfae565f383878210fc02. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USAT22003204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f57c439c2230053b1afde0ab0082c6252f947c30ff5eae89fd9effe563d191. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USAT22003674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb84e1e2cf9d4024a44cd539bf90dd9bf1ddf8c90b937dab852764fbb03960ea. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USAT21906102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc09c3453ca1042862bc6b99e96e9c297fd92b8c0f4f09e01f825fefac209a95. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGA2236889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e55dc53da541739e96df5e8a1766f147abcb345dd074a41b61ce2cbdcb8bb4. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZFZ32343835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71438d3fe5d2f0d667f33fe57388c253cc33c7b46db86085ad7171f7ace838ef. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAHT2315898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e6bfeec1fe47a04e12becef481f857ec188c56865fc87f3b0a6a9062887ee7. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/USA2P2437033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8589c0114800d6040884ad67bba7a5a527df730847da4710097915d460ca824. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/USA2P2453796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4623edadccd7b1a9e8b8636428f5301ca96f0d427087bc1a73d84253a3866f7b. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/USA2P2453797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89229d2ed1594ae73b289d62cd7bab59608a7f4236cacabccdb73403f0492e10. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIW2421863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4569871c99d242694a4a9f12cfba7f95ee36f60b2207f46b01cef7efa6a91ef9. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCAIW2421884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b6df8a6739c768fd92d8300c55b9e1e0fff567c32c9982fc3e6bcd3182cd35. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIW2421899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432a88a4a1d5e39393e74d016128e77951bdd23e1173fd466a0693ac9d4bfb61. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIW2421909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4654eec52463ff6abf92e5b01f6ce49a00b18d750c60313f15577eeeea3ed5. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAIW2421914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7527f082a88c3749e62e645ee137c2467772313d3cd06e51a731361bb085b15. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAJD2410962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462d6c6a8910e164de0c1523d8f8288d65d50b4a46b7aa5902be7c5c542cd440. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USA2P2517507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e75f320324ed64b5f5550dae2111bfc936590b65e02617028c69487ce5175e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USA2P2519604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa7bd57e50a72e0da9252c92ba71ab77c65b2255f1f7f08fa38e624c7d6d41c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2519605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b32a9470cf1cabff2172f9f27a343631ee651999a56f909ef4d05c60afdfba2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA2P2519607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ce7b5b731c4b92591b13b4ed1bc476f44d9b36b2603a6718596f7e101345d3. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/USA2P2519608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81841e23d391c003507052062c24b0359d6983e3dbb8459ef4b385f7825a333c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USA2P2519609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d771bc3903ab74cd6b5bf275a99e74827995cf66029984224a9f047216b5084. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USA2P2519610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a847317aa0696bf4172358302e4310f2714be1ee65a6c7616cba8834e79a0e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA2P2519614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33edac31d005eda52918a8de3038c410e90b5cf1120327c8a6543a1728858495. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA2P2519615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc1fea2249f50066c364643b33f7476ebf4a68753252fb29dab4b04961f499a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2519616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d75f1994e9eb3ac209240d45bad79f6bf55d285e9d3677d12962f42c4cd71. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USA2P2519617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920df18f774d9844bfad8429c53f563142863a7dc7f11f2824d7da3d4687aadb. 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/USLD91770645.