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 0x9b48574236e1e743a8266d45090e64d14bc59550e17b48ddae869e7510093696. 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/0a88b0a8-960e-44a5-8227-bef649a08efb.json and https://artists.proofprofile.net/proofs/artist/0a88b0a8-960e-44a5-8227-bef649a08efb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
House Nation 2013 (DJ Tools Short Version)
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 0x853bfd5e05728ced32121011bdb5da5e3b82155b9f96be3dfeef38d494a60dda. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DEAR42425686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ca04c33e0c9936df4f812a3c51d01f7a00799449ef04319e2325dd33234cbe. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEAR42425483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845a208d2f10ca5d601c0aa9523db33e1425b1ed7c2e83fbe5c3dd4335c9842b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEAR42425819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ed0bcc39afa17d7af3c271a50116309e371b311d713b899c8c06208a26075b. 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/DEAR42425791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccee83e3cd00ea44c10aef917fd1a1ed050e6edcbeb10826bc4272f49b8cb3fb. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/DEAR42425418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8b1949b07fe546141539d588881abab7c22565f82224b090fa98a1d457c6f1. 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/DEAR42410180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b8fb2b07a861cc018bfd448d0578f8cf001f76cf01723cae924f5c45be7f1b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DEAR42599190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebdd052e03c8a7ccc71279cef3e223e3d064a9197d72a2ee3d37f9971c1f44c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEAR42599292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c824249b6831d65d714f874421085d5a1dd5ed6963ee467458af0f257852a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEAR42599474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520a441a792084114caf0f47cf396e9c268804988bd37a4f475f76bca11db1d6. 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/DEAR42570681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec6baecf2b5c9081f1b29eca5759a583ceae496411435a975aca14009034b2f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/DEAR42570297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f91513b5d8d070e95191accd3ad741d2ea33118e027d1d128cbb09df97cc0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEAR42545655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcc96ee1fcadf8f6967375f4f78a19256493cb9d9c586b4d02eb1164a745320. 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/DEAR42530156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37792aa5686a8df86e2bac33052e9ea8007f96e972f3960fe70fd1da5f91d123. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEAR42530640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6698f86f30da41c36024a95ec6abe1a7ab0fa06cb34c517e326b6e7f7bba58e8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEAR42530376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa2345b363c39229e6fcd81d6e56385469bb0fb51df997fd45cb00c2c5337d1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FR96X1638997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcf9ff250b96dfb3c16d551755297a82e010ebc53d8b5a1c08b26a4be732461. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FR96X1638998.
Dance Now - Remastered 2022, Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2a509546d927801e3c43217051495714602a60cee21b144199f2f69e6c0a3a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX202249214.
Dance Now - Remastered 2022, Instrumental Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62646fdd4da5ae1a20f60be43dac1ff549e1886418f2865001abdb19ddb9b501. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRX202249216.