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 0x974fcb10f97cb6845637c14595e9baad54c3fa93dc10f97966596eee235bb677. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/257803ff-2c17-43df-b04e-006c209a2c72.json and https://artists.proofprofile.net/proofs/artist/257803ff-2c17-43df-b04e-006c209a2c72.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 0xad107e9cd30a4c5c0ccf9ecca8fc3fc13292946bd39ca4ecca45134167b7c2fa. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZFZ42326061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d26233bec1138e4f241e849934d478bed3e51e265c3cb10ec52dbccd77bd08. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6P2369488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0855cce9be8ef679804c56925ec12d9c6cee86a984b7b516626cd5986ee5153. 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/QZNWQ2342688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0703e9875c5a7ade50399c9c40a340b7514ba96d4e7515b3cb2f95d1734633ae. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTAX2398412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad4efd9b09de088ffc55440a7ca0ae64a0704006ac01e4b70a2744fb2c1012e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHNC2467136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6815e4ef1ad6fad6ae3cdda819a9fc1b3f5bad387a321575eb312e2203b0e61. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZTBB2427077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d22b1dd564b22c5a7e786416e3dcee86398e89cefa29245b373e84dc6d0a37. 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/QZTAY2406722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad4efd9b09de088ffc55440a7ca0ae64a0704006ac01e4b70a2744fb2c1012e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHNC2467136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebc94f5ab3e51e4b7b996d3837fba1b7aff95995417abcb6cded43f82e9fb62. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTBD2344467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6282c07c6c7c6fd72e5b710b8b8b5d3b0d8bf11477974a4d03de8eaa432b22e6. 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/QZMEP2417913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc011a8883ea037335b9aa95e7932b917bcb03462078eec89146dc6e2d3d51e8a. 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/QZTBB2427078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37057e76907e9043faf751510950c53d3b6de44429cfd7aa6ebc5006f5be3d01. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:12:13Z), 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/QZTBB2427079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94190fb797fe480e56d0e53e2e8e1825e9610f0815393256b0310d9aeb6e676b. 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/QZTBB2427080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399f9b0d515ef4a5cda1d0782b151c7533184ffb145964d65a175bfd197faa1c. 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/QZTBB2427082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1265709e4d4ffae47094e98c1d1ce1a812c2123bc7ec3da972f1cc60c4554f2. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZTBB2427083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aac40d17b715da44bd1501786e22883daaa9b90074067dff4bc7a112522dd30. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZRP52540667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cf614f00fab003358dd5b16f14cf271000d1c9a82a3ac463c82b99ccab6c99. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:31Z), 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/QZRP52540669.