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 0xd316f8455705df4051ed4858d555169b63a8f60b5760f887dbcc6bba4d73a311. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d0a714f-6220-4a53-9082-0b3537f88139.json and https://artists.proofprofile.net/proofs/artist/4d0a714f-6220-4a53-9082-0b3537f88139.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 0x41fc5fe9fa0ad83e602eb117ff5b26bccb0cb2bb785fd5e56f322e3bbbbc367e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/DEVP22400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fdd6d7ee0eb57bbcc60123ce068c00dde756e28c18dec2152fe9a7699abc2f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/DEVP22400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ef4971b3868bb10d40047e2ea44ea887db6252a798dbf515c93e6ea4d0ae52. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMUY42000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c100c58b6ca9d3063cfee07cc7df88e5091c0794337bdae0d7a737787545332. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMUY42000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4532d4a8f536f8c1c2223aaac1b52213986de88866265bf6517f0be1ab9839d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMUY42200221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fd4dd920c57db50b7a3ffdc52868113480b6bcc66556f75625b3e7d3b43a15. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMUY41800279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9f4041aa75cbf17aa02e974175e78dec55e8f1cc0f997d93d267404d3e1f3e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QMUY42200222.
Watch Out For This (Bumaye) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb0b93840df92c70bab9a4440e1b86a588a86cd73586268b7e3cbcfd7093e68. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMUY42200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ba3b72705d62f55bf1bd08ec8f92bc1bae9afd7bb45f9ee6f1bba15ab1a2cd. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QMUY42200224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5ce1a41d5d5a548085f57f81881837d8ca8d7c060fbdba721496b3a774a359. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMUY42200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8fa236013c5b85cc46a9bdde9f5915c2659b5bcaba8817a2a5ad68bacb376c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMUY42200226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2065c1dce445ec3add88e590ab5b1135b696121ce42e086554abce6c0b0f06. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMUY42200227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fbdf243fb4258cdf6b2a197d6d4c3c83de03e3084b7b54137cc3017c765967. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QMUY42200228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d695f8f8751bc9a1a4b4e6cd01bbf39d5360d63cb9474160287f97b6ac48a2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QMUY42200229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fafbfab3987b55f967afbc5a14d3a3b7e22cde749ddadc079a91cf7e508c9a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMUY42200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402e681f2ff3f62bfa350daef52c9da36660fdf0c3a081db1a2e027aedf376fa. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMUY42200231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c536638e3bdbeffde69429b4a1f7889d46ecbef083277f5cc21ca06f543871. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMUY42200232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383c08477c6aa95509ed7ce09af5fc1713d517da44131e72ae6c28805d37a64. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMUY42200233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c5514a7fcd30a374d4c9718613ef0cc6aae231c5412b3ab630ca5e2d9da494. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QMUY42200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630ce9ab9d3ab8019a96557b9ae64d4cc1e48246a3b048798e3a44cf388d210c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMUY42000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002198f038e2df52e5db82102028c7490c5f82bb637b80a7c5ffde644bc3cbc7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMUY42200235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3047ce1eab9a002c71adc1c509bf47eec00dd34b3ae300db6c878c61a016b4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMUY42000177.