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 0xaf1493509399165564d41711735fdfb9387db45b14a8ac9a373b2cb42e91527d. 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/903515c3-820f-4c09-ab79-5381ed22b0de.json and https://artists.proofprofile.net/proofs/artist/903515c3-820f-4c09-ab79-5381ed22b0de.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 0x1355fb52fec846efc6e49af0d4bbd36dede28e2ea185dea1f335792380deaa72. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DKD3Z0019503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe469921b7149b545a8a2ac66047ddac93fa564e7909c4ae753295c1d798cf100. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:45:57Z), 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/DKD3Z0019505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2d7314052dae5fbce46f38418c7294fd9abd0283649d72975f17bcfa9d1b04. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DKD3Z0019511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14fe29c4e9474c45311d9a6b111384d9c1fa7780b8a7e07dd206e55d667360e. 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/DKD3Z0019512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d9fe5012886bb0d0b54ff700e7874597f06ac505fa0c4b778994e5baf892d3. 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/DKD3Z0019516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5979db16a2cfa15e952dc6bd512f54d6b4d0ef0516c9429ad633ae2f0bc1fc1. 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/DKD3Z0019517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed13fac8e951f5263d1be0136dc72479dde711d1ce3ca52621ad18bb7101328. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:59:26Z), 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/DKD3Z0019523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440fe25b5de331d0f5bf4fa6af1b1fe3203853c0aabbf0176435a0b202903b0f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DKD3Z0019525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db740f29ffee2d44bb3792d503e54d6b1a6fa18530f646c833952e6d45323a9. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/DKD3Z0019526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aa20225a312a5cea9eef3d59677b63793094bc6ef5a5390cab3e5f019c48ca. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DKD3Z0019529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998dafbdd4cbc78048e472b33e7c60ff62190388266d5a7f7519bd7ea9c6f8a2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DKD3Z0019530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c9b43e74c8f5e9a86d15836aec5a4403300df137188b3bb6536dac4a3c4bdc. 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/AUBEC2489551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5c26ffe7f912b0e315fd7760e6e11be4ffa8ef4f5d8a47785df93b263a6489. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUBEC2489559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb40c3facabad550cf0deb326e1b10ba28b8e4512a64e625b0c2d284c3160b69. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUBEC2489564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60f6e83c12f6471d6a4ead0af72b5b6ed757f0c6d824aaab690101771e6f0e6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUBEC2489571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21b075edcb9a52b9c1d8a13adf52fe6a2352b0768a1d3f25932aa7dfd083e28. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AUBEC2489573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd019cf7259cf81b7deedc144a7f9bf2c707825aa80aa6bda5748a8bd648b9bf6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUBEC2489574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd3c086509b9375a28447097cd316b47c6190ca5b8c66777f61110f2768ad05. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:29:14Z), 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/AUBEC2490472.