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 0x4676ddf9a94247019f4afb70e7b98e6b830edf40efc9bc5a935e15bf623d1383. 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/c026e458-c2b3-4eac-8349-4fe02749af01.json and https://artists.proofprofile.net/proofs/artist/c026e458-c2b3-4eac-8349-4fe02749af01.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 0x9dcc02ed9b7c9da7d5544e0e6e769c18db0e37946a35b7ce799c8d01b6fed414. 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/JPW292000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6467a2245b0bbf80e47e5c98548a994cef404b18807de5fc6987847e936be8f7. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/JPW292000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82831dcc9bdd438751f3859d43bd925dcd637b12848bdeb9e631a9003d1532f4. 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/JPW292000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abc10a0884eb4dd00f204ad0187f70648ccdeef8c2939c34c63a0a0c39237d8. 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/JPW292000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c25b4dce1f2c7f052a291250f9b6712dcff9f493af7305462277b929c92407a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPW292000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b1fccf747124f0064900f79d64130b2b5311638d3064cd0d95daa39305242. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/JPW292021010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8899d94d295823abe7e171bbe79eb90edef1ef04c9ec03742c8ac3e23a5b9e09. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JPW292021012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c404cef6f09afc149c64f68691cc2728b81ded30708628026124f9ac4338de9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/JPW292023001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c404cef6f09afc149c64f68691cc2728b81ded30708628026124f9ac4338de9. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/JPW292023001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c25b4dce1f2c7f052a291250f9b6712dcff9f493af7305462277b929c92407a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPW292000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b46bab70dcd69327dc6f2bf6fd7a9bfe6c7767ed325d2f3b7e9be440ca2c70. 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/JPW292000066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6a514173b5d2932c6fb55c8607608fb98424cde565fbf3aff4ae46ad408fd0. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPW292023002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b68b5f422b39c2379fd0812ae76a7cd56e6b00e152986a979756110494688c. 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/JPW292023006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccec58cb9e3c9d4420f86fa01fa9e981f0853d608f0eb530ee8e4114415ef9d0. 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/JPW292023007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62a325ffc19f605c03a392ade56973e9bd8a8ca89a254b459bd78be926f949c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPW292024010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d26e60d90fe64c252ede508124d989649433a65d86d8d73a7b90b18cfc49c7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPW292024011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec4f23003c8833c1c6fd219449ec0aa51770d7104dc0e3a8340971b25b3909b. 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/JPW292024025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33abb3d20d3789cd897a9b695655296dba1381ab45aff26b72de3f0c5f47bff. 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/JPW292024026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec4f23003c8833c1c6fd219449ec0aa51770d7104dc0e3a8340971b25b3909b. 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/JPW292024025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953e892a9da99343c2774704e4df1cf54a288e034fcf98337a8d4b2c35dcab7c. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/JPW292024027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77827a1ee7bfe4e8648408bb68c70c7485bc244d4e73fc1a916779c41bbfbb24. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPW292024029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5edd1493065ed9d5796c7a2cba29f03345a99d8538caf8c55d876a76eeea6b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPW292024030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148ab05d000421c733f2d2b9fc7b451f16236ce41b18e29bdb497802a88cc0ef. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPW292024031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc628a7f77895d53f62217cbaca767915fe9546c18d4c602a478d968b1a1a7ba3. 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/JPW292024032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8e8faa44b7f020920f98ccfe65b0dc8e6ae226feafbb322d34dc46d965c271. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPW292024033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40510fe4f7b82b8c699845ec3712c8c64e5c4935b504cdfb37005fc5e0a5975b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/JPW292024034.