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 0x47d610f5b177598afdd6035a9ac5ddd4b72a0c34a8a98f2213d97749bc033288. 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/9354084a-a321-4ff3-b7c7-ef8bffb079e0.json and https://artists.proofprofile.net/proofs/artist/9354084a-a321-4ff3-b7c7-ef8bffb079e0.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 0x5c7e1dbeb26bf29a2865aa130b23385659d0fce0b3315ab4bf46b5708f80a727. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GX3HH2450785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d83b8346c334e1cb73c9994e9ecc0976a4c45cbcca7e15fa38e7fb563fd92f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWX2413556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e766559883b37cba1fa965c141c3b39c7c84f5027f6be1c64103268201af5c. 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/QZNWX2412055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a1bac589347b53397c860a54b0c8ac831f9dbd58ee8e9d48567b535d4e67ed. 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/AU3SE2401458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aea1c673f2f4a0c53711211b879341bdb8b4c6f4f60731e4b708b8b3c73d901. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6L2472558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321e3f52d8dd716e2aba6dda5c63cebd205a573a3c61dcddae42b45bfc6b5618. 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/QZK6Q2425150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971723760997bb6c56af8d491d4e95f1a69440d447aaa1fe85fe591c0bf5db7b. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZK6Q2425152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88b9c4b9e08e7d85cf96d386d4867e82b8c7ee6c7f55a23539621565b29e45a. 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/QZK6Q2425151.
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 0x04044455d954e888099ff0f7a270b1c2cbe1703929f88ce24cec8b2352d67628. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN72465649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3cdefde1fce8bc0d9b66d7fdb4773f2141a8b896f6a29972963bf6bab1820ac. 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/QZFYX2441149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4f315a78dd25c4c698a2aaf22b0f2b4e1d2d6b50acc67142cb9e846235320f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUGBT2329200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498f0b5290fdb0a51dc3ca484d48741784203d891db652de3d6148ac9b43c6e1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTAW2350395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154756af9fafbec4e12cc5e2bdc1961d85cad338311c447fa4d64ce46c0b5d95. 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/NLAM42300355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10c1749d17907bc772f7981aed4dd6133829cab11bc26046cddba64e359803. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWQ2514549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2584b4534873e44fb2940e868af07991fbcadb7b36ecbcd9020839e5e8771eb2. 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/QZTV32594685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6051d8d9cbbebce732daf1cf65c4d698fde39cc240d26bb3d9f009ad51f8b50b. 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/QZNWQ2573462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d0b3e9199aea1d34d7d3300cccc3accbb2573945f9853b7d5ebc238a98715. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UY07M2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb02c5524e69ed2c6850f2c9cece46579bcfdd1380e2d00eef2ee1e5405dfa8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFU2426530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d841c27d68ba5d1927fd434607dbf399f86f48c67caba8f15b45ef04bf9b87. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFV2488710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f266a3ff77099e0ecc9f9686ecb3c58a40bb464a4c87ceeddf131217e029da. 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/GX8LD2573863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c74c0be815c59c6f5b43d97bb7cb67ecb5f110c19c710a667a76ce0715c9ff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GXF972466833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6573dfc03277fd6dd30ae93fbf8c7ce4537308d9f19fa24ea1b3bce77f320ce1. 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/GX8LD2505571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930faf361fbbc1cd4a08c69f4950d7792fce5f65a834a2b935d4fa3e41810cc9. 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/QZRP52426731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421380bcbefce9c270d3455d8ea169bb434b6e6cebadf58223bf72daa6980e99. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZRP52426730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5200d46be1ecd082c3d37220922955274df3dc7eac990d9670aa3080754a7f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GXF972412194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161babb639e9b51e4b8bdc6ba8f332d50d626142923f85699560d4513577a8c6. 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/NLAM42400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5aac3de3813f4dedf5974d9ada30c4d02e67d633b9c3a6cc3142db8ccba1e68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZVEM1870421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4a9dd24e0a29ee960794662718bf8fe1ca12954cd593f27e8c9c9118bd2b3f. 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/QT3EX2422982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a80dd94c8f21126a2d9589f841be94f3fb2a75788783e7058b4f4ca51ff45a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLAM42400417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455a8874a017d765aa428822ad50dfc78b02c6e5488ab81ded1340dae9c8cff5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFE2490829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbafe54efc8fd86a20217acded2b0b854b8549c14e22f40faa0ccb9e07a42ad. 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/USX9P2467375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd351bcbccadcd4dbf6fb57ce57e0aceff80f5069673bc46ade088093b672c4. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USX9P2467374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2c9c3318619d04f3d77c4d94a9ae74a6257afbc172adc42a9b1effd8c730a7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USX9P2467376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c355ff229ba9dbfdc6dd7a5a9b3508938f0067454f846de7ef7e8d42cd0831. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTBC2477733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdaabef18a6988e7a1fc90b347e58464982d2532fb83b244a8b2c2b8881a2f7. 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/AU3SE2402043.