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 0x445d42262bee2f4752c690bf262b8185b690e01307b0ec0c17277ef4e1e7c647. 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/30ea9dc7-63be-43b7-95ff-284effbe19f7.json and https://artists.proofprofile.net/proofs/artist/30ea9dc7-63be-43b7-95ff-284effbe19f7.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 0x6b75176cfd746906f8cd6990ae8485b4d45c3728f3caba6814dbd14029343753. 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/IDA401805222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081059cf92b12e42ff6c8087da29a41216a8a7dc610739d5c233b5caa79d2b04. 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/IDA401805226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5810bf51570281c80b738d2ddc09bc7ebcbd4bacd488bdae4e1ade93f6c8fc2f. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/IDA401805228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7125635f0e3a452c7c0c00c4e08b8ea4cf276ee1730c31040feee86e9fbc947a. 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/IDAB30614947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7e68e281db5186978377b4ea0c649070538737d34a5c46a266f815a8b17c75. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USQY51726603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008ed3cc30087d25a781ce92d15c000eb821e3d66e445c320fe691663b61bf5a. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USQY51726807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd451d8a838372707fb391c31587db94075d2fb2025ddfc3e7d5422ac15e2c43. 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/USQY51726811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8313fe25d06a21db454fc29fd39ca9a2f6431944ab5bc56c2190672b75bb1d89. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USQY51726813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0e157afb9380c3b051ac691b861aa0c5d7219a912095d9b9ef2ed1df19c87a. 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/FR2X41934680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134d670918e14a51b20e2c397684df052b59932a15382db1c285c08d89845398. 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/FR2X41936181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa124b4b6b5715f6be358d7db0c34252925fc3fd7c1d466f363ac150177688b71. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IDA412103917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf2495b50c27d71ace7d1fc576f6e3f51055b0776e98cbe8326347dede40942. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:38Z), 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/IDA412103920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ca9bbb730ec7261a70057de351615c24927cf434ee6bdf72c906aa5f1a9182. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/IDA412103922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcef68ed7745806904ade5addfdcef2ee97e3c8ab9fbd751baffa79fdd95a0e6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IDA412103923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7e73fb805e6de81ef38029b5eda62e202eb3fa3baa83e13cec8b9b2309bb20. 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/IDA412103924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd969dbd22cd1eb0b5f0ec785729e9dc381871904d574a2f54867ce718a8d7bd. 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/IDA412103928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5e807322441813b44fbcaca73daaf0d9e2a84262a20f7a1e2fbe36d2ddebd0. 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/IDC302112499.