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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafda5ff15039b99fb5c9f88a68b96aa63aaa5a38cdbc165d82edc98f13642f26. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/336b3dde-b35b-4193-bc4c-48abb65682b3.json and https://artists.proofprofile.net/proofs/artist/336b3dde-b35b-4193-bc4c-48abb65682b3.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb526a5cfd07e2ceec895f663f2bf78318538d6565d7d19df0f2d675c6e28b5a3. 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/AUMEV2244664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b69b104c11de5b02695138fa336e4e59cbc2b5182d5592e4433078a0b8db3e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AUMEV2244665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd21b9c3085d16290427e9c0159813b395d90a5083fb0d6347e11e04927d1d9. 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/AUMEV2244667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f5328cfde358d72d4d7554ee9ea3ea6fb4193f2c0b1fa9ce30d6d3d2954cd4. 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/AUMEV2244668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65225133b473a51d790ca6e93363b96b9839e208bb53c53236810c565eaf6cda. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUMEV2244669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f885f51f6810fc1f8fa28c52d0c560ab54e12dc054ef7e8913eb64261d7340. 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/AUMEV2244670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf814cc1a5e12702879b91c033d99aa1acfc2ef9ffb893d8b9fff31b9f2451df. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/AUMEV2244671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65181d532da313384508dc3c3ce2e5271ccf75f045ba7cd435bb9ea8fb7ee853. 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/AUMEV2244672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72fee55e8660c786746109fe1ce222ca90e66a825e8087760797f0ec76c05dd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUMEV2244673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8639cee71f4fbbe56608444c366d86466c1b1f78b68e6b715c8c3377a995cc4b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AUMEV2244674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b43a12d42c9277836ae8b6b93984a8204a5651f39cd226c0335512dbf29e322. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/AUMEV2244676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb107fc41a702bea4e2dcbe65fe73f82cd9024e716efda431b86180d97a5f9da0. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/AUMEV2244677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf604bfb9a3ae7d56fd6884e10061ae889f5591a5a6ddc51cffb6458b7b4fea6. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/AUMEV2244678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533cdd941f51ce9c982b632d9faa73d88fe1c6fb6d6860db55acb703b59b9087. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUMEV2244679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fe85be469b77746fe9269c2009f56e485a3a5be01f3c7ce218a1704f1dfefa. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUMEV2244680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0c474e6f8594a0e4972664b708c31577372cdf516b088d285d354e62378af8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/AUMEV2244681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf2e3ea0a17be78310b4ae4cec0bf66f07f44b9b0e0f8f897d973327ed93fb3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/AUMEV2244682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79ff29c8d28cfdca0e476ecb17b3d46514627af73bb7584f43e89f2920f1746. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUMEV2244683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad78e5bba1f7975ddb66fbffc69e43cb74e511329739afb71bfa4c7fa61e9d0a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/AUMEV2244685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6abab16778377718a73cd9278d2c1409bb07fbcd0db5987014c4b93048dc40b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/AUMEV2244686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4a32870804fc9ea32083f73252c546f7f025dc82dbf6d536667c56f028544c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUMEV2244687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4294266755b89f4403b9c4e68781b7e99b5eb586c5013372499eb86938ca66. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/AUMEV2244688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3e4372f40195b3e35c0500e044961df17a4fc2a5d77ee0bc763f7315db64736. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/AUMEV2244689.