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 0x1a7845f64826621813a43f5a477fb53b847847135bed0e80eaf58374a2cea7f7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac6133c5-185b-4d15-a843-729bc61936e4.json and https://artists.proofprofile.net/proofs/artist/ac6133c5-185b-4d15-a843-729bc61936e4.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 0xb7f600ff854c9ff101cd84c0a581e96f7fce9559e5206511ae8dbfd88984ace5. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:54:20Z), 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/QZN882398919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffbc83e49efa77bc368ecc17b378b659edd8e0c19e76903783c29070910151e. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZN882397162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834f64a8ba8bf7fb4761f509a92dafd6681fd8b5f1195a534891273957c9476a. 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/QZN882397166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c25a18d56c0f7955a72f995608366567bbf61bb3ffac0a4d698b920de23e844. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZN882397717.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef46fc93a988be045205b7150e7f510750f64e86ff5f6a7c44d66adb3cd9e13. 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/QZN882397718.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dfd5f75e856ca8a53ad0dddda9c1528e44ae1dedb376f43e55cb8b6b153e4e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZN882397719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd5e680a94eb9bff07ea28d7db771fad7cc4767965d077b2847a5c9a17b610. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZN882397720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbd90f9948f33fb23daac17fc903f31763684459364d77ce0e142d595d685c4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZN882397721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7de80fb08ba9da00b077b3e9031183ca9c81800bf9cec5e1a8e56b50ed41c8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:12Z), 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/QZN882397730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91a9826eb3bfdc940c11838f51663dbad81db5113dbbd50b25857264131a5b4. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:24:25Z), 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/QZN882397732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe329857f966e5019e97fac7b82171f32252c7cf1c696516c77b3786fe3d30. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZN882397733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1021cc4a350b01b6be93285b4b9b4ff54ced721c2210a8ffa7313bd5b72e3db. 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/QZN882397734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57d342dcf864bd03a275418d1e6164e894e925a12a255b2e9514d65a8ac385a. 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/QZWDW2303786.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342f3078aa7b3c390eea14ba83aade2382615b586055970875634a517600558e. 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/QZWDW2303764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407cea32ed62ed5faf0017ebec9fbd780da349850fe5e46f77cba549b7d1e840. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWDW2330801.
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