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 0x050028ed54c83ec115c0e5c604f03c9390c140305ff145f0cc06e8199e080bc5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f40c9599-0dbb-4005-9d99-6786fc905738.json and https://artists.proofprofile.net/proofs/artist/f40c9599-0dbb-4005-9d99-6786fc905738.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 0xefa038a90b61c78ae8937af11200749cce9433bb15d2db8040b49aa55dc3cd4c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/IQA001604224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1268fccead627f2c2b20b104c6d2bf8e55a7bd0625174bcf614879f3dde7c5. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:13:38Z), 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/IQA012004952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35170486da2d206a68b47de5a763d101e6264764d736857bf87fbfe1f4bd57. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/IQA012201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5342f5de7791680c5ca3594b73e0972dcc048e0bbbd1f5ed7b8d902491d428. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/IQA012201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f0e86d062c3711d80694eb4068a662cef0ea288f233024af47f7c98048bb01. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/IQA012201049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46517fe6dba08ed863364568b7fa8a734b19d7981a79cf6698111b783e9ed155. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/IQA012201072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9551ac5000e510d664df2267608fd4a2aaf65c6306549d70b22510b17cdbcad. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/IQA012201091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11a22fabc1fea69b1a1cc91710b8246aa9db3defe1dba0d8dbe0bc1cab78d35. 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/IQA012201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad0f219d0d800be0705539e494a2508728e24571408bd41d77f91dac65c50a8. 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/IQA012201096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1de36283dd4add6a9e4843d99b79ce1921b8cdecff46bdfd5079b7dd8d70ff. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/IQA012301962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d0f39993d12491713f74af1e78d66d960000e0bc09214c4d44f89464454249. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:39:23Z), 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/IQA012302653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401a6be8159d0a65b936229156a2364bd49368f6997bea0aa3314a8ffefe3aef. 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/IQA012304069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4851d8658524ca729c3085c722a3d28da894662c01a930ae24e1ba1dce2ceff7. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/IQA012400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729ade0981893a08879e992b771c654a46aa950c97626790e9231528e2e818ce. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:04:51Z), 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/IQA012500166.