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 0xf5c9c42732d0c122a686f3efed642f7c447682c389ded0cbf8a83d2dbfcb223b. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e2ede11-37b6-4c12-9037-787608b83c68.json and https://artists.proofprofile.net/proofs/artist/3e2ede11-37b6-4c12-9037-787608b83c68.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 0xc3977cbb2b8ca891887bc566344fbc3c40589ee0fa337b9ed661bd428f083e98. 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/QZNWW2226316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f1db0cbe821cc1244be5ecf1a5ff1f386d045a8694a6503e7a93aacc6c384b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUBEC2088906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbb170307a053285b40be91cdce38b6e7aeb1836c9d1400d5f308932ba70c2. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZNWW2226315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485a8fd175dbe1f02653444860c9d3cd4fabee43567eae8437cd5887f7db5669. 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/QZRP52216839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de260835aa7b96755e905076899b307ab267edb7cf4642bcccbc0657e3b7a2. 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/QZTAZ2255878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cccc6a0994ba6931f37e2d99f7d77b5d53d08be763a9a0b9d33efed86f30a72. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTAZ2255882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e7af5cb234d8089b082bf46c819ab2239ac50dde3f20f316d1296ef18c8412. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZTAY2291897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e70956ed3a44efff7ca4201f1d54ceefeaf4468960a0de14c004f81dadb29d. 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/QZFZ42507655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6de3f64320fcdbd8016e60d214516ea7c458f46d9973529ba2e3f454fa677ee. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHN32583216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3656c23e63044cf7a5eba2d7da24cb3c609c5a1e10feae103a3bdc62790bbada. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWR2527997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb62d0bdeb3d26ae36a94d7a79868d2e11bab863e983abcb65b1b2aae4783218. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAT2542062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bc4473e0ee70eefc31808e4a7cd77f497e5155f7208db4b729c603e1e5b2c2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZTAT2542063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325dce9c5bf4ec87f6a40d2f70e523d3ded112bef77214affd98083b00dcb375. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T21:10:13Z), 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/QZTAT2542064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8600d8d6c23c3814b6606dae0e8699737c9ee724d5929317969fc06ee2c0f70e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYX2463898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6de3f64320fcdbd8016e60d214516ea7c458f46d9973529ba2e3f454fa677ee. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZHN32583216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b95c13c2036e3f4968d09add78592dfa86919ac042aa31396e31f0f0b20a033. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTAT2542065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7d173c38070d0a9b0bbe198c7b77a94f306a5b05d4269659d5e618a8cedf47. 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/QZTAT2542066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e70956ed3a44efff7ca4201f1d54ceefeaf4468960a0de14c004f81dadb29d. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/QZFZ42507655.