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 0x0651866a7f623cb85eab92e3007f10fc25ae9cd59f768ff0dcacae2f90092189. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c133d6b-6227-47ea-b8ac-687910d4c171.json and https://artists.proofprofile.net/proofs/artist/7c133d6b-6227-47ea-b8ac-687910d4c171.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 0x567c8fdcbc3479b635d3432114efdad0f7154af4f161238b432649fd6e01edd7. 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/QZK6K2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f990820356fd047e27146d0fc0b68a5f89094b1eec2e603697c4bed89f5f624. 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/QZTBE2459544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a75bffbd11a7a47bcb87129dc236a7daae4f7b87a488465dc93bdf94f756a0. 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/QZTBE2459545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ccece5b35207ac9f1b4e022c3598dd89fde66b732f5a316290623db50632c7. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZTBE2459560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1163c9d3ab06d1c3e2b31b9bb98093f834c00e233b20b8b955de13be6c9dd950. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:27:40Z), 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/QZES52586427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed6a2dcfd633535b395bb4c64b9001306f22d6b879b68b30f697115eb2c800. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZES52586428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1163c9d3ab06d1c3e2b31b9bb98093f834c00e233b20b8b955de13be6c9dd950. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZES52586427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed6a2dcfd633535b395bb4c64b9001306f22d6b879b68b30f697115eb2c800. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZES52586428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a81a524730636240d2592559a6c1aa25ecfdd684228b70bcc5ca74058f934b. 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/QZES52586429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b70962ebcead215acaa9c9bc57b73178e657a36bafa561e80c454786b3ed6c6. 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/QZES52586431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdf78a198c11dbff35fc606c13db32476c4a74c7b3743b4f4184f95d8ce5bf8. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:44:11Z), 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/QZES52586433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452041089232c916fcb32467583891dc75d15277ab6f8e053e8850ba0636f522. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:47Z), 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/QZES52586434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247abb0ff113fefba404faaa12301809d0449296ffb2cbae13366a205e9cc6ac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWV2559341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc627a1123052ea2d63d481791a73a42cf19ed4bcc197ec9a0c442bc8c733aa. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:46:50Z), 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/QZRP42571739.