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 0xbeecf166dc382ccce5292efdc6837b5feac584d0c0b5a11e9fe23372f7745b13. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6c88eec-11ff-4375-b0c9-1e531c368eef.json and https://artists.proofprofile.net/proofs/artist/a6c88eec-11ff-4375-b0c9-1e531c368eef.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 0x89b2093ed5ebbd7497e9eced38ed8289a260fd0402ba5346ff911c695d750670. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU9602938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb778f195834fc0a79b3b7dd694a99a391a3627dc92613d7ec087bb485682defb. 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/GBSMU9602940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc15ec2b18632f684efbd998b03bb7b8e0482c3b6862017770181a57c897723. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/GBSMU9602941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559dbb0e5636a68a14ce17712b14ef1c3588a7dbe63e25c329cef6e8ceccb035. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBSMU9602942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668a83b20b557e76321083eb32de2ba6ac8f36277e5e5cfc3b7ac0c8b90d9b17. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/GBSMU9602944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d349210382a3173b5e02374a2664bf7ba646a54f77aa0c9e7405417bab586. 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/GBSMU9602945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e9f1d55568f6b738258974a5ccfba32094671e0135559d870351bb5adebd2e. 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/GBSMU9602946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b67bf6a4f718f1944b3e68955d8643f2453a33f784ec778c38ad7300e3cd521. 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/GBSMU9602947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b0767e05cbfbf9ab64c4c167160de8fccb3bad3f7aec2ff4b67608b9f94425. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GX89G2269469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd880799356c30fd6730efcd93ae45f5ab39c30d0966b8d8322c4f73ed39c3295. 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/GX89G2269461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2540ee1e81a85bf9a3f14e43d87733adb4e2a1a0fdc1efbee35d70c1646250. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/GX89G2269476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eff5ee24aa28260f9b207ea92194d0c3481375c42f5bdf7aabe2f2c38e8739. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GX89G2269482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6763c4df069cd86637e2a7738def733c35bb95386073cb3f169928d74f5e2fe1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX89G2337923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0831d5cf8b912dbbbdfd9e5f92b52c6f43381ade216f5252c05c4e3a2f76412. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX89G2342686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b70fab8a91a87236a9bce36a6c0c8fb26526192887541ebc849e372d274cfe. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GX89G2329639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf9d566d04f543bb81fc8c138b6207816d1dc8da29ed8a0c5454869bff80457. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX89G2302652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad0805837d4d5d9ff63685be7af8d23c77875a6f658febcac894ee3fe8037ef. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX89G2320980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676795c751835f5283a5b06f0cec46cad7de1c018d6b62f259aea177c7273931. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GBLLT2305571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af5b21c862b70fa5c06c3fcaa55564f4dfc5fce00ace34af2e66fe49047233b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GBLLT2305572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe614267d60fc44ba62475407482b18294103cbd82059ab4a16377433bbd145ad. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBLLT2305575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939326c98948f2668eea9e04056fb21e93440c54e279d908f82f53a1956cd300. 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/GBLLT2305578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2004ca07b39362b4a8dc89ee719f5d5c8abc4631da49105e49b1c8bcf39fa4. 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/GX3HH2398348.