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 0x00159fdb94c8a52b73bd3856b14d9bb9e1ff2f8808dee1e05db7cd4fa8ba75ab. 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/3126440e-a5a5-4f8a-8cbe-bb3544d98a2b.json and https://artists.proofprofile.net/proofs/artist/3126440e-a5a5-4f8a-8cbe-bb3544d98a2b.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 0xb333409f37909ca091e344277f55c09f3e67cfa49bac474c8b8788257dcfb7cf. 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/NLL8M1800482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ea8274890a9fbbf36fca478bc1df753bf063214b909b63b21df2ef375e4ef4. 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/NLS241900443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eb494859db249aec41d77bdae3e3b9769ec698278116923554e5f7e2be9181. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLS241900444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3d449209d6b50b59daa7e1f5e8fc5dd4852f954b8fbaed2929322ef69f8769. 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/NLS241900445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c804957c382556c894a65baffa34c314f2680173e6594df55809985dbf24dd. 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/NLS241900447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997da7cdeee8b56288b27ee9dc2d8ce1b3cd4df891b4fd98f1fc4377ea649456. 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/NLS241900548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5227dac04c741b991465f67871d5978daba3d7f8410d964e6674f9d5dd6535. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLS242000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae26c9e0419090e1c869515978d12b481730717ccc295f6380399348a2b9fb66. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLS242000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69c3251bb84f10d680b9f565e58a89ae7be1a863b4636b5341f86ea8c4ad1ad. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:40:16Z), 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/NLS242000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84745136382107935022be9a74e6857feaec6001de8ac5bf9f73da20ac1f00b. 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/NLS242000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a6e57ac7d47cb12a16b8566e37133fabc4494d753ca979bda651dac58d50f7. 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/NLS242000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8889b6d599d005cb38da0dbc0d8df8af6ac7d393a33527144a1be1db8b1723e3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/NLS242000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b39bb5d27f34730b5021d4806b80c1d011401e8f0391369b5aefc090c65f06. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/NLS242000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa75de590b7e3c4ff805448eac931478b81b456e596f58a5238d1a01d2bf6e86. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLS242000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfef9dea71df9ff45e29283866a5e0798f93f08ca7d0782d49de04a02564464. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/NLS242000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b523ce822d63fc66905b8798822cf07be46724cda019703c956ae139f62124. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLS242000341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbee4409276cd6beb00907f2eb2a94f4a8d4c187c0e6dbc0c266e43dcaacec08. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T10:59:41Z), 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/NLS242000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ce04c7494281e2a4e6d755b055e5cb85141843c16b33a6397d378fa39f0d3c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLS242100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8c55c80708c6fb681aaeb179e7decfca7b122214e12c541a3083fb2ddad7e0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NLS242100421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd579eeb3d435b2e8e3a043a04c1a1d3d3c6be80219e84523c35c59583cf19a. 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/NLS242100600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c60de02327ef737964f5137afe104a4b0ce72bf17a1f281a8127fe18657e5f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLS242100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c37367340d5da81877e4038b66a74ec73fe045299922aadc7aba5dfcd5b2c5c. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLS242100556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb26fc3e6f77035af13f4320062a0f294153d9f5e37d2b5bedee10e4b92b906. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NLS242100360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2340ca10b247fa1087867f8956d8e0cc453a1f6e92c193008bf0d1bc327a24. 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/NLS242100606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda049225ede30fa558b4433c2b57b2221dda4d726a2ac5777ce727018d6b0c67. 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/NLS242200395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f64c866b62c4878d9028df06b3df0341dcda44274516271285bb6be4e4f2a74. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:29:13Z), 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/NLS242300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a67c746d92a937487459d5816afa66c412b8e88bdf3d9034dd56872b7acd8e3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:48Z), 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/NL9HM2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511ab665c5f7bd2ad32559724268e7fb717ca3bed356c413306990bcdde1ed31. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/NL9HM2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1c2d4c756b9d61c07f3f426e452d31bc0354ce5c3882f2fd1fcbf0a28817d2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NL9HM2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f64c866b62c4878d9028df06b3df0341dcda44274516271285bb6be4e4f2a74. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NLS242300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b307a1f74e384f681e297ae392db485a30dc815be05f11a6759f58861569f2. 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/NL9HM2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25420ceacf846b19d89920a64a8c78cc6731edc3785563c8f848ec5c23a0a85. 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/NL9HM2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa59487316ee00e29adca39f211c77edd9d1bc5e4968b4db66266ddd82e2f2eb. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:46Z), 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/NL9HM2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76a1b6b4b4109e6738ab123fdaf9f52d4063db3c8853cfc6750ff7f9ed1cd6d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL9HM2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2971b97b96aae46ad9c2563d61735e0e9772dd4eedb8f3f8d1c904d865ba792. 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/NL9HM2400008.