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 0x681ce0058971bfe74138ce955e22afdb4cc7c949e31b29f92912eec16ca2881e. 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/1970da58-3f7a-476e-b746-de2997cd1ebb.json and https://artists.proofprofile.net/proofs/artist/1970da58-3f7a-476e-b746-de2997cd1ebb.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 0xa0d0e25d099ac9037567afc6174dd872387c0d80727dd5969efe45dc34826a9f. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHNA2548848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b55d24a1844e1c348f79d621396d8d2ba3aff5fcf1fc6abf7b3525913af1fd. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNA2548849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b43fdfa9d4485f6b080fc6155e72bee46dd53c65b1ecb2af3b08b9ab527513. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNA2548850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b1acf33ceba110175a066c1cfbb01a34f4bfc5e726e245d1e7e34bebed3aa7. 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/QZHNA2548851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92483c3523c02902aeee31976265ff5c98422d7bbc245465610e425857d4b0d0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNA2548852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0b99f7b173d1aea42a0b90e4417ed060c489531bc6d2a5db559c2bc527e360. 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/QZHNA2548853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0d6f63e0088c863da7f45e11881ac7999429430cea04f270c0bf1a93141cf6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNA2548854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18745de65a290ae2413f083bf480af1a051aabd17692b8f4ea1bf63682c1ad88. 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/QZHNA2548855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899779bd04e4b98bf982aa0ed97d0b3ef277e934263039941226c06af744f624. 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/QZHNA2548856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17057849ac2a14551830ac7bef02e21a811c3c19acc523aed7f6ed350b3ceb92. 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/QZHNA2548857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09df2b3ec0a7133ebb05881bdb98ef53ab46bbfea2bc677efd17010eb3ee2e2c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNA2561807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9373cedcf8d8e20970712c8ace0c13c95875ec432a5e2d145f3ad6fccfdccffe. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHNA2561808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8eafc19f7296fd0ab2eae77830a53a74c29464dedbe6c3bc3069e017645dc36. 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/QZHNA2561809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbec6971e6b4126b18b5bfe25d8b5453317b5e0a70c80a1ea672b4e6e7331646. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZHNA2561810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf67e995e4b426d12ddc3742ea3517a72d0172c52de0002c0db8a8692f5730c0. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZHNA2561812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cc720654b3151337650d620cac3f3379d5ee195b56050264efe89ccd06af80. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZHNA2561814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b550900400d89cb00394cd5d7065d438c463d490ff0db032a2bb248a456181. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHNA2561816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0b55a9e5cfeb3e8ddaf760c4b4a5f5bfd998e188cccae806802635e4d42fe7. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHNA2548817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935ff62ab622b46c4a4a182bebf90e8c5dc2a50493073be6173516f2119c496e. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZHNA2548818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7c98bbb0b157ec0f54059b4e9870486b0314af1c939eb00ae9d3a95a249d6f. 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/QZHNA2548819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962f416992fb71d1940a5f819cf2f9bbc0f9640e9e7bb1f5eb19a03dfb7b87ca. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZHNA2548821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f977ea6c932cc7f7d3308df7c8218b4154ab45f1f18b9b19bf150e71943d5d. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZHNA2548822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719360f58febd8ca83a4dc6ed6f6ca9806d179952387b5e32b324c555c4c71bb. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QZHNA2548823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff0d76457615ce5b3bbcfa736940b0b01d47b475ae98464b735a791bc0f41dd. 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/QZHNA2548824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fc7874a7039e7ea29248d1a3b5e0b12ee6be4ce49ed705b4e41cc18a3d9b89. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNA2548825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63df45198e9637f28fc2686462a70167bc85d2561d76a4e117a3f0e0397e3b67. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHNA2548826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3dfabdf4641b5dd56c11ce668125c2a8e83c29222ed6357cd3806e48864efc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZPLR2528179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da2e707661e4b8ca913319578fc355c542c5add31ed782fcf662623a2025549. 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/QZPLR2528181.