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 0xdfb0e761a8cc66665a2ef62d38b698d184b1ad39d29630603348c4fc6e0f4e4d. 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/f403b72a-f235-433f-94a3-57b1e4bbe592.json and https://artists.proofprofile.net/proofs/artist/f403b72a-f235-433f-94a3-57b1e4bbe592.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 0xe78bb74dbef13f9f2b9f5224a4aaf648ca9ddf9ef6352cdf31930a99250f93db. 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/PL2DY2400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d284eca4c8e436188044b09611936a0191384fe00f8e0d2b697a3ce18159d3. 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/PLUM72200462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab94a7d87ad4c3dbe8b402ba145ce36ac9ced518f16690ab0526a7cdc51901d. 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/PLC062226132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1373831ff63c47daede97b9f14f93edd6516baaeb17f32f27d1a49fd2cf8c01. 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/PLC062113272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89413f325ccec95c8188964c3b45b8c1166fa9d92fb2aa02b97ed86f133c0bad. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLT612250012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89413f325ccec95c8188964c3b45b8c1166fa9d92fb2aa02b97ed86f133c0bad. 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/PLT612250012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aba75e7c3ae7633de9ae9af17054f4575ba3e60fc92d6cc2a60b10071125cc6. 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/PLF242006889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5139004537a2b53986210fdeabdd68694d231014ecc93f298f2c5313a1585eec. 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/PLF242210821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21da3b3b52081b6affc16d6ea7bbdc99d45ba686b1fbaf2524f99620b686bb49. 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/PLF242210929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ad62dd6df3356da8870f50c98cf5b56c961028a32bbb373a1eee5cd5d01545. 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/PLF242210930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae30ca6fb78b915e8e9f923f44aa86a5da85ac6d15fa965851b795559804ad15. 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/PLF242208839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180e7dd90a89d337106a25d2bc22189105b503e67b08e312354b2a138afde165. 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/PLF242208847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec25f3014e0589d90efb4694fa7372cc6122a3af19f1c23125d226dd263ffe8. 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/PLF242208848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b707716a4ceec17d774cd22101a9096b740863b5c711566776fc04b6c4fa8b7. 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/PLF242210385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3265e1aeb2608851b38cbc7041ae73389bccac9e03a8395cd194666d81fcd401. 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/PLC062384568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab94a7d87ad4c3dbe8b402ba145ce36ac9ced518f16690ab0526a7cdc51901d. 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/PLC062226132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51902f12817abd2f6216e4d47402ca490e5a44135dc22e77a48231d4f931aa80. 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/FR2X42416392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85addabdcacf2eb1bcc698258b2ac7fce879068c5683e1b6c04071ef66eeb7ca. 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/PL59G2300351.