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 0x68544de95f565673059c5b3cbcfbb6ae89ab7b38840f58cdf3ad9d12c60da754. 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/251d3afe-be46-4f11-8323-65a2b548e024.json and https://artists.proofprofile.net/proofs/artist/251d3afe-be46-4f11-8323-65a2b548e024.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 0xf09a3cf3e96c25921826db7ab083975063fc0d1bb78bb0f109d7c1b0a6d9b240. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEP2093235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa919ee64f9156f36d858e791b118c770c2e5697984ac55c3015637cae96c207d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFH2012623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9859daa7db2befc88af6437e785a83c073eb21adcf39d228412c05c3c03fc3c3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAEX2055266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48d2f50c448152e462cf6529e17d63e0588a369926ed2e08464a6d508c69c03. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762192753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c22425978903614f371c9f75b024e2cef4a7a095d30c37b41c3c5932155cd4. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FR2X42240181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55596aab21924baed2c75fcbb02f599c883c28b4a870cb59972dfbd1f9e6f176. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR2X42240183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a5f2d80aa9708ea51b9b40e630eab745f49690f0c7fcf8beb3e712e926ffff. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/FR2X42313659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd186395d80e2c26394a26f5ccd5ba897294a640ebd4ff0f51a8a4582278ab27c. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FRX452379910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1f720ff6f524df83280100b54ca6147a26de800da897d193ef9456d8c56c8e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DGA052314512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019bad06ed0355a7855cd117f5a2ff71f733899e373eaa0a4e5e34bbb22e7fb1. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/DGA0R2463883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4eba64e2b8f08047351c9b3637a7a5a889e94200ccaa3505a145e899913218. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA0S2487247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4de81b0a1b4af0c66fc721166fcfcab2750e6c2be13e2f946ee7d6ba507411. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX452511927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4de81b0a1b4af0c66fc721166fcfcab2750e6c2be13e2f946ee7d6ba507411. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX452511927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81849289883e89fd005969dcee12970f77db0140c12266ab625fc94301696c8c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX452533523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb664da555f9e893cf8e224c787f99414ede99df05f8966fd5654c60bfec1262a. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FRX452533524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056bfca0ff7821c5ee79de58325ab0d66d461540c01d744dce93bfbd5da781b0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX452533525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4eba64e2b8f08047351c9b3637a7a5a889e94200ccaa3505a145e899913218. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0S2487247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3a23b63a247a97a50a337a8b4eea3139923f6c62dd6504fad5647e92931977. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX452533526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019bad06ed0355a7855cd117f5a2ff71f733899e373eaa0a4e5e34bbb22e7fb1. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DGA0R2463883.