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 0xe8bdb64936f6edcf33ab0a0173d3f8d000b5996d37608e73605b095323fab410. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74960cfd-a0df-4089-9ec4-8ce6633e6e65.json and https://artists.proofprofile.net/proofs/artist/74960cfd-a0df-4089-9ec4-8ce6633e6e65.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 0xb2b7f3969f3d5785bfa9310fb3c115d747309471f0f1c1d1dda0ea917e3018f4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ATR981192552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0ad70a4baf2b067ae390ca01576448c650d613208d6c287a8fc76bcc30c23c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ATR981192553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17309857e30d2514cde97f41337955b26e37a0224d9f40c61b5fcf681a6588d5. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ATR981192554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0944161cb8e8d62b4b512a70e9c34e2eed701aa29369ec759135375fdd916b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATR981192555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8682bb330441f8becc7a656b60b2b1c13e94a590441eeb4affb849b53fb2c98e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:58:13Z), 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/ATR981192556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2071634aa3d3bcb4576bdf018586e9971d926af40ba7caa73422fb561e5925be. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ATR981192557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ff792b49e62a7dc2a4fec0010c3ae8a6a201457ec38ff6e0e85a4d3b076963. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:18:37Z), 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/ATR981192558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86aadc304dc310d47bd476e1cc151f9ad8c413aec0bd006c6eb21b26307c122. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATR981192559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c505efcf730e5452db53a5ca8d0919b4a4bf5e616700b0f8fafa823eddf3fd. 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/ATR981192560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99857c21ad4fb73ee319c8e349edbca36a3e2277c427f2acf8b977239735a666. 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/ATR981192561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476de2438dbf7889beccccd311b3ff2756f55367033bb51a209f60ad4286b58a. 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/ATR981192562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc45dc49411cec306a37429ad362502dcb831c2ad85b44deb1147c57f2197dc1. 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/ATR981192563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5529cc14e76601373377bfb63cf8be37cf3014d232b94b9c7ecbf47a28d381. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATR981192564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec5042864dbc379663c9772fa6d53393ff31cc6f34f4f837abd3ca60bc36df1. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:20:29Z), 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/GBLPF6784359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7815e53936f611ef248a0ad115224e964c8d5f0f650cfc1fdd6436ecc5f9ae9. 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/GBLPF6784364.