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 0xe37a228094ac87e3e292535e6f1d7df084417adb477c80497f782a51d31635c3. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f957663-e82a-4965-9a7f-77dd96944b29.json and https://artists.proofprofile.net/proofs/artist/6f957663-e82a-4965-9a7f-77dd96944b29.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 0xf43cd2b9a84ecc8edee8b129c2c259c4d36fbac401591729467ece1954fa4163. 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/QZDA41882433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af3bc7aa459241813c4fe48ccc769b657e0740574ae8e8be0efedece2c7ce1a. 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/QZDA41882434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc6fa2001314646f0006858103ca3d5204507f9181e55083866ac86febdc520. 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/QZDA41882435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1877c9febfe7ea4eac545d0a68817bd06005b5d8c9bbec5c664196f2e1961d. 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/QZDA41882436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b334de1ce4fc7d94c056096ff94024bafa44f1bd3530ba836f60c8a3a299b49. 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/QZDA41882437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30df1c1eea4f8b570b4f23ded980c3e88100d7523dd1469cdcc5b1f436613e36. 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/QZDA41882438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736b9d9483d1bda08cd9590497fc922a6caa34b475a0d20c1d79b20964fe6620. 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/QZDA71986819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de04b76fab033d5a89a13aa65d15bef4a10d311cdaa0812ed24beafaf0d1049. 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/QZMEN2185014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42523a97ccd0d7e8bb43cbc9b0a98adb6284108a6297be51be4729c310d79568. 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/QZMEP2127160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b953f821e4697533305e28d49349e470c1d6fe66dc3bb31a7c4460625b285e. 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/QZMEN2174404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957cbb49f038025e786dbb39b0ce8cb676596a8daaa0658895a22d512b0a6ec3. 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/QZNWR2115493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a338b7d1ba8281f9b039b1a281f4f4c408bb81e6b24fb8f5984ee15312b91c3. 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/QZNWR2132413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c0e47234aec7dc0cca2d6b2b12537e750b9065fbc8390858e424e4ccdf96fb. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZNWV2197749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff0150cc0de5fad1673b35ee4b58bdf138f0d76a932decb60551cad8ef2ec4b. 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/QZNWX2136013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe31437921014ca8d0668958dfda51abc633a0601b888252b2f69eca19604477. 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/QZMEN2152064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff0150cc0de5fad1673b35ee4b58bdf138f0d76a932decb60551cad8ef2ec4b. 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/QZNWX2136013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6005e63d55789467b0ca200979679f8272b462639a3e2afcd7857a79cad97241. 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/QZES82391538.