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 0xb99708a5388aa42fd48c7d4112ef2059f3eafb2b823a020f87f12666fcde6036. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/242a3adb-b305-48fe-b17e-49cb7d81d1f5.json and https://artists.proofprofile.net/proofs/artist/242a3adb-b305-48fe-b17e-49cb7d81d1f5.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 0xa69dbfeff8559f64ae35567496cd7ebb323807c0201276dc0ebcb1e195d24a4a. 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/SE6XW2424644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ac2371ab6173243e30df2a173510681babd3807837a9c3e49e21c90f445f88. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZPEW2568250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f40102682714be5be0eabb07fc38a1e3a9455fb30136ec531b23548a2911be3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZPEW2568251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f6e5bb6630d445c52c987bbe437027fef7a80c6e16d4a98fa9e7e07981529d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPEW2568253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827bfe4bef582711ec49a557b56296a2bc9e6559159a9266ee9ad23065ab3453. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:16Z), 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/QZPEW2568249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ac2371ab6173243e30df2a173510681babd3807837a9c3e49e21c90f445f88. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZPEW2568250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f40102682714be5be0eabb07fc38a1e3a9455fb30136ec531b23548a2911be3. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZPEW2568251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f6e5bb6630d445c52c987bbe437027fef7a80c6e16d4a98fa9e7e07981529d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZPEW2568253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9001970e54ea10b3044ab9f7d06ff234a40794fe107704b034faf930c14840. 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/SE5BU2577169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13084c8b8df0c4e7bd7b54c41b0d5070aeaa9e3cfad13c11bf79d02fc1cd6ef3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6MZ2591011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252004d38722633d52b8eaf78492a0ba614a13341d4f60caf2ff0ba8d87ea2ed. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZVEM2592477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d1e3e09368e98bc9aa1f31c35253194934e3d9be437fc816e00a8265c91762. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QT4K32582490.