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 0x4960f3b9992c68f0ca9ec1a0b5a6f26bc35891e773015837ca17e1ede74e19c5. 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/d8ecf000-1381-4024-9b0c-c08675cccc28.json and https://artists.proofprofile.net/proofs/artist/d8ecf000-1381-4024-9b0c-c08675cccc28.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 0x672b6a762fdf76a13067254db977f6e97118b7722069732421856620fab318c2. 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/QZWV32343571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544f5d147563244e4e38ba6531119a4cdb767a2639b4ef82154e254766017041. 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/QZ5FN2471200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1ce91ae8fde07b79c7a0a97002874a33824221f8a6e7edeee8fb2a7debba63. 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/QZTV32384357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317e5d345b4114fe9903c565f69b6ed861a676a9201fc205eda63ed138d6ed99. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5FN2457357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915281c0fd9c7b1a341085900b34b06351fa6d487a3235d3f4ee414283a0ae0c. 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/GBRKQ2472532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6f8ad165ea0349eb54cd54ab675b6611f8ea8f0b39edf506bec63a67563e02. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ5FN2471368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd2a1e459a4a953bcad91538cdb5e66c376b90f9e23c7e75235667097f93fd4. 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/QZ5FN2449645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0b49fb341d60cce58d1af98b21369769c81d389b4740278b0dd093927b29f2. 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/QZWDD2388331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef847b6cd27d7a5cb7a772dbca19eedc92bb50074029d9b0c8a3c0cd8ca5686e. 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/QZWDD2353706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c9a340a7d77d3edc53c4a6da2aa8259a399f69ec1fb74dfd7202a4b3f462c2. 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/QZ5FN2416373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56317fe9dda9073dfeb0c10e71a0046d053f14c256079b4d1928f38887159939. 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/QZ5FN2416388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdc5211b128adb3573206319cd3c7b62f596b65e81d9a4f5790777f4eba3876. 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/QZ5FN2416393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb482e4066f9667a5e2fe617f09df1f1d4ca71e4da297c479c38fc4805b6762b8. 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/QZ5FN2416394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f6434b3ce8db2a157ce0ea3baef5400f602ea14e92e1060189bd68aae19e88. 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/QZ5FN2416398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec6ceaf0b8213bfb58259ac28c1ee1eb174e85ce71de278ff310018c6eb372. 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/QZ5FN2416404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb23a961fa1d31b6cc0eb7bb4d4b6d579889c78d034ffa67344801601a51590f. 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/QZ5FN2416409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf53087f15befe92189e965c8893918119bc003ac4d9d57077b9332adde56e. 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/QZTLA2486794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad45c93dab11f52aeaed44edfbcaf2645d47e980092c77a960bf43ff2f908397. 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/QZWV32443577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a14e5557712c20de69f8e8dfa39505068ebf3035d872b8653d2154ae8df35ff. 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/QZWDE2408747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d59951ad183a0cf118ce4737bf36f216e655a7c812b62da3190d2cbb77462e0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDD2457596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36667cef99bd0d63618cda9f5fd3132c5ba1121fe4d7c82112bae60f1b679fea. 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/QZTV32486244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb4275fece61be1c8de455cf591b09f8a66100d2987d0bf1acdcb8c7132440e. 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/USLZJ2483989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5627720360470d8576e56b272391a5b134b31954ef679f2bf7c92613ffdbdc. 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/USLZJ2403066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1415056fc549ca1f47355cde5c0506f5c7adc6b354607fb37050669e6eda2a0. 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/QZ5FN2416357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf27addfa5ab9c86b9f8d59a4959e8f97510f29b6521d56f6c7bf20c065275b. 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/QZXLZ2371115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0b12d5b8a30c56bb06adfb5a60d6142277cf1b6ed4abdad309596ea6978e36. 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/QZZEC2319994.