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 0x43d4cea655e8609b4d221087cfcdd0d48ce5d0b841e68944aac5e304b93e2cad. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6aa5ac03-b15d-4fdc-ab91-83cfe691f413.json and https://artists.proofprofile.net/proofs/artist/6aa5ac03-b15d-4fdc-ab91-83cfe691f413.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 0x0052383711c03e63d44d7cc4788ff8862c64f7a979e7d4ec21e2c3cf88ba1e48. 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/CAA501637801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9b6dd4dbc84c96dce226f6aa49c09abef71e1dff58db449b10d6bb90bba977. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAA501637802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e1e76e34409933cd5c5b8a581df092ee621d6969b6300ad674d51e09252c56. 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/CAA501637803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2690f637cd77c88eb6a4da0910a314b0a7903e56c6e8ec919f52b88d5c3a206d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CAA501637804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbf8257b6aa0ed60f735ddcda73aab38653466bf53d2faee951d95a0cf6c65a. 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/CAA501637805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d94aee213b1d6ea173957918ff94aab51ef73a007788688257efb561768e7d. 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/CAA501637806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd085fbfee31cd4fb84907bf67938b015be87180372bd9f147188fff416c2b8b4. 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/CAA501637807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8282dbf8f395df71071476d9c1d5683f4b88a0200833b210ffba50b21b7ac15a. 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/CAA501637809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e42f755409971ee942cf9163ccd356da926a85b22ec8370d3512ee3245bccef. 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/CAA501637810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5949c8a6970d2416ae1ce10de73f4ea7ebc944467ff86afe0e3b5c9a6aeb96ff. 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/CAA501637811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859e49c2b6edced3d9e1962c94426b9fba9d37570716eae39c5e25306999503a. 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/CAA501637812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa932301dbd69867fe26b29313ac511992f65fc8da52c33272ed58d2250e943. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/CAA501637808.
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 0x6627ba69cefec847e5dbfff14480d1741f0bbeeb92798545ef2065601d950b13. 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/CAC549912401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd6b145405e62b45513b80bf72bcd021440efc933477750316d230f673f038e. 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/CAC549912402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1437f0f6fe5216643252b33b693ec0f13edca4f1b1d703e3a0dca9172e8065e. 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/CAC549912403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3516b7977cf55e0dfaa5a2a1378b5a73c61f1bc5f399828cb8bf73f69bcd7f2. 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/CAC549912404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd44bb084a47809acd00cbd7fe299e3c43c7c8d185011e530d02e2e68c4cf675. 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/CAC549912405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ce90c2d346a896bd737b5dec8f362e7a14788d517cb30046bf2e4ec3606137. 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/CAC549912407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8e11141b6c708abdb77e875bc9d5ea032299936bb03f32cc86c026b2262244. 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/CAC549912408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2bf35603ce12a3a35e0beafaf87918b4256bfeb6e58fbff09cfc8c0352bb30f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:42:12Z), 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/CAC549912406.