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 0xb7709de7f58b100f4776110e39dbefddb2502e5756083965ff5ef7596de6b5b5. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07e05ad4-7ff6-47b9-81ad-17771a88197c.json and https://artists.proofprofile.net/proofs/artist/07e05ad4-7ff6-47b9-81ad-17771a88197c.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 0x9ca2a56b05d56893cbb1b06f1afd4752eb67adb9f86d3ab6132f2eb8877cf44a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USV351465262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe342f722f53eace7bc8059872ae62dc2ac803e5acc92c8c20816c21cd9ff43f3. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USV351465266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2c2d285f07016d30ed50df9b95208a0a136dc0d7950ec110ef13fc5087fb8e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDBB0610206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fb75e61d5bff72366c605b71183ad1d90b89528d9a281cecc830fc0c22fb61. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDBB0608676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94190c5abf102f02cee005e2a04e299024b1e753f529ae6f153eafffb68089d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDBB0608483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc375050e05dd1c14e2bbf55cbdb1f93c7dbba015fdcf953db7943d5eabd38b9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USDBB0601604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbf4782c78a568dbe96d6dadad9a148fd358bff4d78940fdd272a9eb2dfdfb2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDBB0610048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e17a475618be73c3b884c03836e4ea6bbabfed46a26dbf079154e299d40768. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMZ961126792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302d6e2c0e2922ed6d5f220e4a7fe9846c2660c179340a3b1394c35a494e3cc9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDBB0610539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78700a71b5db6595d0f34d418f9a60743b168f32b7c7b826aaa55a00e3a436a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDBB0992433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81c81def3ac85785694c0efc003198ccacf91ee62c480003d4a87bb47d52a6a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDBB0600189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d2af921d89151a8c38ded64de62c022c2bae0f8e3eff5e318254ac7599b39a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDBB0608548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c17b434781dcec6c6eab98620fa715e677a9fa30d617503b8f47bc2eff78c3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDBB0600530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211aa97f5b40c8257c26bdde1fa566359fcfe5111857c6b15332c41a4d209c8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDBB0608445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30e49ffb730c774b53e4b2b71b4b46a93650b2b7a0da0e3c4c64df3f95e5d71. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDBB0600885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d4bd04b8f896f5a3e6772558fb5bc6a3fc6bff58fa9b0734505584e63ff91. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDBB0600184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8e66ba5a9abaf86ab23e5e300929ab1d595f837fecdaee22ee9bf652920845. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDBB0605915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb56face053e4f70173cc1bd806ffc2bfd3dd6305cdb81c11782717c21131e4f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDBB0604526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6445a60c2ab1dfb9692eae18c2d976b8bada6e9b86f3f0f43b084d1e139254fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDBB0606077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e37af64bb34247b3d2443bf7c1eee41688a5c128e656bf6a17ce94c985d2c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDBB0600883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49cc988a9c8e330a79b4bab9603c7b8fa0715c7561f1d591080fe2a09635a03. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDBB0600091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720f7ad774d40beee7b25ae00aef548643e2373d62353f45fd42f967aba2c1e4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDBB0610819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ff604cbf60d88c6e4052f17e25fffcecf9b43066edf355af73725223a4cfff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDBB0602252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c82e6b0b9d34e55246093b3f71f9f375366890fd30a45100e33b0b4cb94fdd3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDBB0601704.