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 0x746c3a00108c8d3356ae2dc00a7890521c4bdbd98107c361fd5c79aa2fece882. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99d3f87f-88d5-42fd-bc56-84e3cb18afb7.json and https://artists.proofprofile.net/proofs/artist/99d3f87f-88d5-42fd-bc56-84e3cb18afb7.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 0x8b5129b2060f24f69987fd1d6ca53d0aa56b6c1bad5d7cc5c133d9cd5e926849. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIT2470371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2817a46dd7ec7a01be8c457bda66c9a198e53ccf5321a387f2e79dbc99aef99. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIU2417009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dadb34cbbf895c79f504d88d45027d3e00d82e9098b0e56a3e9caf6f33028d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIU2417047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bceccc19e9ee71754d92712d241c363aef6f4d8861a181601a21671c447e662. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIU2483622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2777e3377baa6d75483a80e13f86a43e00d96f6819bd9314e2b7c6a570b143bb. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAIU2483629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d083713f58a0f49d73879d24fdf4146387b685754393ff4aa6f88362043dc15. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIU2483634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc006ded499ddfd6ccc1194933a4fa44d2a6aa120d20db78a222eef38a6fce3b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:12Z), 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/TCAIU2483645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ad693a2d18c977f3cedf115d40278f4192f77b486bb0729a901c2fbe121b03. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIU2483670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b77ee6a06c94d7267719aef98c47b47d9db998d3631075f19780a0542c1388. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:43:56Z), 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/TCAIW2432748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495bd51d0680f9366b49d7eca4359bad9def1d62e5ed3d966e8482aafa50089a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIW2432753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd1f6fa27f8b72bd6f4123644eeab1f2404aa51dfda12dd55d5df2113017cc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIW2432756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704fd2b65da89a1489d0617722ccb6441164fcf8a3b568f80ac8e156c242c9cc. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIW2432761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4118e3f6be2ede1fae0b7272de05ab62dace8876400d913a5024247fbd8b289e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIW2432772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42406f4f24af3193bc4667c1ab4402938986e89923d8398b8eaef51ffd24c4d0. 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/TCAJR2500543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a22ce565ac542d694fc2f870a39a1a11494a40e9a241e6f18ece11929e7b85. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJR2500548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f72698cbe0b9660053179a4a7ad914247f82d61de6dcd638780541191badb26. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:25Z), 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/TCAJR2500553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36679830590575398ed24b32cf5a6ff3d72e603f35142b7839f31b541604bafb. 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/TCAJR2500557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c691f9f5ebdc921de14480c81c6746b10930b328ea895251d9e71c2b891bf0e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJR2500563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdfd32dbfb0cbc2f47e1f114f960575edc64532896da1661c6b40dfbd22c993. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:35:16Z), 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/TCAJS2500568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01c302d658c703d91ebb510c1aa2c5b580bceff3fd748676bfc99f9693661a9. 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/TCAJR2500573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8357052390533695d3761a8a779e0c535be128d9dd01da6a6d497432b8423e52. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:14Z), 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/TCAJR2500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45ad64b3c834a17c77d30430fb2b8d01a6d9bb9c8798a46ba91895c5ec80b07. 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/TCAJR2500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b88265b003425aad0a4f50b6345ee5208ea11b8c57c079cee89795198f4ed. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJR2500588.