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 0x243e22e795ab40c21c7e61a73b29857d7c3c3bf1fa1acca6abb633099501e3af. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8678100-1f01-417c-91a3-9c8acf03f99c.json and https://artists.proofprofile.net/proofs/artist/f8678100-1f01-417c-91a3-9c8acf03f99c.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 0xb07de215b44aa1d2b24d0086aec02b8d3e1705aaeeedec243fe249fceca5f10a. 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/SEVQI0901321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d501304f4d270ce9b0abe64523b799eea98b8e8ad43bd3d4a6e0b03aeeafc48. 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/SEVQI0901326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cb4f28f4acfe18cc9a930465e7ad8d35a92a593116bedbd1ef02720d8b485f. 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/SEVQI0901101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bfcdf69c4f489920246d7e31ce5f9d90231afb4ae5a9e084d8142ef1a911b6. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SEVQI0901120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8322c06a176f85b88fcfac3afbbc3a3b661bb64ec3a9b924b6b39aa28741b9. 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/SEVQI9606812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0df0d4852ccbe59a6e94e89833829513caef9c91e3bf47f7faa9d6cfc0ff48. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/SEVQI0900901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d5f466fd72178366801a9433d59de830490e3ab5f20dfc450000289c7b7703. 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/SEVQI0900902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54db7dd4779b689d05b14c3652e27a6b6f4c25de292df36b85f173228be7b5c. 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/SEVQI0900903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465a65cfdd97fc5707f37eed624b47267bfcf7a4eb959ce48bf86cbd169efd83. 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/SEVQI0900904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a49fd3114fa4b54d1acfb5f0772bb423fbf4f253684f6aaa9295efde9987242. 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/SEVQI0900905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2318c65216a6ca6aaaa4320197731d1c9c616787a8d9392844907f2db0b0abf. 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/SEVQI0900906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a92dac9795cb0a829171e606b7ddc2c16f7f04e12c9d6c4cdf41a5a291b652. 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/SEVQI0900907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abc0015b2bc2a3d8e9bfd0201fdb0252644907fe9435cc61e43ddf89cb3116a. 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/SEVQI0900910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f1b60e7ac34738afb6e1e36c173d6af8f48404b11c166438401e042d7ced7e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/SEVQI0900911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cc4e907e95de581d710814cd574331868736de0fe7a9b3deb5cd2e37ae6ba3. 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/SEVQI0900912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e2b528580b2404a4dcbef2547a23f7cac0b0a7d19abb6fdd791b010bc82582. 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/SEVQI0900914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf93703d8cc8f3bdff72159b6d0a3e24f48e2832d435b91037576d3987c1a18b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEVQI0900915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb740828886c5214192a9a36e30e4d4b034ca78702b55eadf199a263696f5e5f1. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SEVQI0900916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6215eb88758d0cc44716a897fc70d44ea8aaabab50e38f37bbd457dbf4bdd8a6. 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/SEVQI0901001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e7c7a2dba2dfb39066f8f715f9e9099830ea4d9cce7f045e3f49b559acdb31. 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/SEVQI0901003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d941bc8ccae05a21e994afb445b4ea48e5f8e86a0eb6c82c250eaa7c7be0c9. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SEVQI0901005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0e50b993f25ed015735c606fc9d49216a216383e9e88ad684c35f0aecadef9. 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/SEVQI0900801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d391d1912faf184dfdd47ab6736bd9131844c7f0554925f3f634a95b2fe0715. 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/SEVQI0900802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66d3b5d5c18f1e2b4e7b05b217989d905668a1f53f368b3721c5adca5583163. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/SEVQI0900805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f439ab26458bd3bca66c3db132378b03787ef87343452099fd83dc8d7b8e7a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SEVQI0900807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2032bebbb5a6c676a6b74f7fa732f60127bbedc8770351feb1970232e8062ad5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SEVQI0900808.