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 0x998a95ecabdba9b0052271e9effea39ab168a5adab6622e82e15045e23e34ac2. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ab0ce8f-b1e3-41a8-8ca1-d09fe1ab425d.json and https://artists.proofprofile.net/proofs/artist/4ab0ce8f-b1e3-41a8-8ca1-d09fe1ab425d.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 0xea680e9ad7037d75a199ca4523c173e5141ee2fd1078779a12aaf18dbb9e9dcf. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:10:37Z), 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/TWDH51704494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd101a9c5216b4a43f5f024fbfb32aa900988edcdaab6febc4c85523ba57ef5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:09Z), 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/TWDH51704495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ca109b1a5f2260a652707e9249c33822608681e87841324dd2240a3f6bf04e. 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/TWDH51704497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2752314e5141f3282efebb72cf85d5a7e813ff003490c8705af0e56968023dcc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:24Z), 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/TWDH51704498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ab276207ac3814f8337e018a78772bc56fd5bcc00490b289d47f2f14c365b6. 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/TWDH51704499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92cea2a1669240cd51ee174a071f78c185214126b6b83296257ccc7a901d994. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TWDH51704500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c5ffabb3c1be080f194ba61fc10ce84c422add1b53c20b7eb6e398c1ee85f1. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TWDH51704670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a4eaa50f718a1afdd0e5b9e2174e45368e0a6978f9d9a4a18fbde655681b7d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TWDH51704671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab27e5b1675f91ae0778b8ed93de2b34938fc3009467b17f954b537c346f178f. 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/TWDH51704672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb618354dd300cfe8194ba11679739adfdad90befe84b637d8095caab8cdc797f. 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/TWDH51704673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133a9e140c2b50675a7c6e058dc3d528217f41cfa5f84bbebfc85ef15fcb3726. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TWDH51704674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd159e29cdfb2ebc21e283801b49a0f5cea1e74124616529cdcb7522eaf6e016. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TWDH51704675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c20f7de5b328b9afa38fa6de8ce47adbe80c1c03b4931b33b6cd8863f773dd0. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TWDH51704676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71e7f3ba5178b8ead427a4acecf89dd654eab2da6c99f8a0af663bb3c74726a. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/TWDH51704678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717c5e6fdb6fa001396b767ec81d074925157e6342936c02e4e629f3973fac1e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TWDH51705228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb82a9e9a454529d549589c84371b1d54503ca9febf19acc3e1a65d7b2e9544. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TWDH51705229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb358fb54c890f25476d395d1eb702c5fb6a9ea1e665fa80bca7d0bb9ec3b444c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TWDH51705230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721497d3a6249884168fcbe55372e6154a0f799d22c12618898fceb0bb5b8edc. 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/TWDH51705231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378f183b3eb663bca5857b73ac3a9fdfff5f106d137f60576294ea64c2ed410. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:33Z), 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/TWDH51705232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fb660ab0d6f92e712296e91474d6ed371e564691376169d740c5f78e415d03. 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/TWDH51705233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe086f6500479fe21daff4fce5b0c2f9c7e4d11abaeefad636de6e1d35cb0591e. 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/TWDH51705234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a67d0199e62463692ac30438005cf7f533be2ef5f8fd5832554cb6637fa4b8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TWDH51705235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ed2e22bb62f85bc2b8beb0a4458b8dbbbcba54f6cc9009b8dfdf0b6ead3fe0. 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/TWDH51705236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010d5e3cab39ed2ff5ffaa419afad7b6cef370e63c9183f6092fbeb693829691. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TWDH52010179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa130a15aa879ac1ad5acad14d36d12efa7fe83e1b333604048c738408273df71. 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/TWDH52010180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cf1ca8120351c949b4fedfeae8d2a0aa3f99560fd4220006b7f4d18ede3754. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:03:56Z), 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/TWDH52010182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c4f3918b01907a42ee443eae5576dc131bc0ac6645b088cafd322234353e00. 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/TWDH52010184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a35703f5fcd9708d148ccc0d047d32404dca1d835b83fead7ce325188b0594f. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:58:54Z), 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/TWDH52010185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d78890837efc57d875d020e4f5b14cea7b688d55853fc2dd4bbfadd3ef23d. 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/TWDH52010186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c0dc623a7c3ecfbca178375c32b536d2c054811b3fade9a979b8de62d26d18. 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/TWDH52010187.