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 0xbc2dc47221cbaa8c33bd2a4c1460bd7895c6a607c18f2ffef9208d6da855c9c8. 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/86929cc5-87a2-42d3-9990-73b51d1aadb7.json and https://artists.proofprofile.net/proofs/artist/86929cc5-87a2-42d3-9990-73b51d1aadb7.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 0xc1e07caa5524dc84a0f16d76e47c2ea5d5dcc2f2043fbbf24bb7c7bea0e4a705. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEKB72447003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0ed9a165c6f1615e2d9c16325865eafb09544aebb6f5fc677e62f29494f0d2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEKB72446973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaea1fd2719d006d0d2804969c940b5930602825c6723332e2cb12661e179b3. 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/DEKB72446972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc02ae906280cae01e8b9515037e9bb53ba8ee96fbe9d87b08fe8b83b4188458. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEKB72446974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b63088c5e0cc24274cf059cf5ac230169d919f59f765d2341c5d14eab1aa31. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:18Z), 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/DEKB72446975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8bacee9b1477aed1639f48cd01fb76dd2c93ab7b8c681e32b7fe69d7d21611. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEKB72446981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf91a396fd358b4050d28cad5b91edc0744463878d7ed7360015083cee823b65. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEKB72446982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d3b4e80266c0fa9ef8a80499579ae757f9b3ef22b0601d09c891f6566c1b90. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEKB72446987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e406fe0ac20bcdf140e12ec049e3c728a520d1c73c9962257d929ae4ff2320c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:33Z), 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/DEKB72446988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a28b8ab6cde2f941ce87854ad551422cde83f5a34af945fd27c72419c2ba98. 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/DEKB72446992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04abb4fa20770476b609462938e4b0df72d75025798d0c3b7e66651811ae07b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEKB72446993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dbb7c8b6516c62c2c677dec9fbb70d833d9df9ee6f5af5a4f788c6590c2654. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/DEKB72446994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4483626a0603e98aab0cd18639225d39b32f741908ed8fd593b1f345b19bcecf. 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/DEKB72446996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3acb70d5f0801bee48d6f7055c4f27fe4ebc53307a59a742edbed0866ebfa5d1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEKB72446998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c3a31e8255c3ccd586e72f56051626b999cc114f738d1dc3967816dc4b0e06. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/RSA221820181.