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 0xcefe993059793dc08c5ab3e6e2d2915889d0afdcb73f518788b7e316c2295051. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91f88c71-6967-4cb5-9e45-95c95153454f.json and https://artists.proofprofile.net/proofs/artist/91f88c71-6967-4cb5-9e45-95c95153454f.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 0xbd2ec162ebf084731bcdd1b6a9c2bb58c054f70f4fdd52b4176de44f2f3796ce. 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/FR6V82608327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e5d023c4d14996b0c186e8e04811c61f4261da493e451aa50f0978b5135d93. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR10S1562752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19854f7c2ab7a30cd644e77727dcf6f43a12e2e6612aed71f0a6ca1cc4ff08a5. 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/FRX762168910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe462a40f401b27ca79beab32e24dfa5ee48c8bbd50d71278b395e1886add152d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX762168912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5207b8946fb02c3bb38fac7a99d593f72de047f26320260e616ca1387ebbd1ad. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/FRX762168913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613eefdc5ea2387de211d4a0d51368c19949666f982f8597a2cd53d61f380c26. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:33Z), 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/FRX762168915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6def927ee6868dc4cec4b105917d84f90db1ce4c7c33643d96a14e645498bc3c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX762168916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc685e643b5f845addd86f9f1b7cade7113c0ae71959d0cc9f6b6268f016b7285. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX762168917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf0b660cc4a7f6171a89f4dfec9760658ac181fd4907ecead4f8834467f927e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR2X42336827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf590b70667a742134c09e92e579f8074a272c4378706ad0148421c517dde190. 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/FR2X42336830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6648e4728c5da26b3b152a82dc2d66cc77abb68c8072a0c3f6943950b87aa9d5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR2X42336831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a95b62aa9593cb0d6ce1b8b3158ace9bcac38ece9dc8010b007d22a6e7e99f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX452278354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe712845a834a9d3d1c5843d7cdfecbf08bf994e464415f49bcc6008e6c632053. 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/DGA062236560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0928639cbad9001950690acc87362ef033586b0dd9fcee400e9e8baa5484de. 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/FR96X2398225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc52510c0a08345f798f11579767d5d2e94611cd9f8cdfe1b6bdb569738b1e24. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/FRX452516150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e90fcfeaff4be85eb0f2ac14ade3f9262e4e30e1af3279df4450c6c2e48d6a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX872522100.