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 0x8a29ffd95c7de1fb2f018a77150fb7030461f9dd4c8fdf37ea1df3add0fc41ed. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2c2cf59-b395-4817-baae-115de496a421.json and https://artists.proofprofile.net/proofs/artist/d2c2cf59-b395-4817-baae-115de496a421.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 0xe805163883fcab21813f3782eb00839e1965dd7f413f58dd3b9f517863e3d4ad. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/PEAU11102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc686cca0687ec67cb18a5df23e704ec32289d7a172461a4511ee3d4498afc56c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/PEAU11102006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205ff202892b4b54f41118e77b4ab70948180be1f4891422a8a61e827f75ac14. 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/PEAU11703044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0dd60eacd8f70476b609c5d63bf5e8625e8fb53c0e68af922f1a150d46361a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:28:37Z), 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/PEAU11703045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce736495ae104ec7d0933cce9f12656574d31198a0d20766edf92614a341e34. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:46:09Z), 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/PEAU11703046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5110185449eebc6bf2db0dd937bd49862446416b1c4670e5f00fbf31735999d9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PEAU11703051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c1934c292b983401981d9caed5abb50082cb258ade33cecf6a765e0afb0db5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QM4TX2328675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfe283e2b97b3c8d2514677a6266a8c272efb7f6d4e7f7d86aeffbe840630b9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QM4TW2389285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca51db0d141eda1c1df22b06fa04e3f91d021d40c5e900f7a2d133e769d329a4. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/ES71G2061031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21abce09219209ac12da4bff17e362ffe0ec3b6032dd5b26a433f9b69e33244a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM4TX2328850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b74bcf131f0649b0d13651d5859fb461ba1f6fee465aeacee83574abf9ff95. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM4TX2328865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb75a0f11714230d5fc3cf7fe3877fe78e95dc0f2fc8d3fc79ae17d8f53063a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES71G2202272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb407fb686e7fe0a07cedd5fed5ca70f91cd33ab0298c5014424ad8d47ee7e80. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES71G2041903.