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 0xc0e156f87da20edf5e4707c260847881b11ae1f0225f460010a6538b2f94efb5. 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/e6f1b1fd-4de8-4224-b8a4-7fd2c50a13b3.json and https://artists.proofprofile.net/proofs/artist/e6f1b1fd-4de8-4224-b8a4-7fd2c50a13b3.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 0x1ebbf3fcddef33b689617b31e5dedaf1943ab2d596c68fd6263ba1b6b3f0fa7c. 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/BCA2A2400319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cac943b9cb6b10e6466d53d9ce24ed92269988facf2ce1aeb5702ed374d390. 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/BCA2A2400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff99afe3a587c5c66986be6bcbb44454cc762580cbe1aea3eea02e363a81d72e. 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/BCA2A2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6ea72411726d9a163bdefdc07835aa844cc7e7956c63ff641987d5560d48e8. 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/BCA2A2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b29afdc5d4e8fa04e6fdfeaf6b063a0c6f44eb9fe63b5f7592b28dcc21cc92e. 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/BCA2A2300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e213d888c157a80b0d1ca692bd704286fadceef31f6f561258a118f7039e5d. 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/BCA2A2400068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe1bbf9f3e53de87ccc8bbd53bd09f4abeb770e32ca580669837005e1978e2d. 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/BCA2A2300366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0172dece9c1ea12f77ea0349db0c6e37044514fa2203d8b6cb188ec8ee29b563. 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/BKCMX2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105e94f26ba6c2438ae4b1a76af885a2293024f54abc6e5d2c5a6c003439aede. 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/BCA2A2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13585cade3a77f94a9c928c05208ad0301ef1d9ec1be24a544b66b86a82bf5aa. 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/BCA2A2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b01a14d2ce82d07466fba8732d2ca6fb3973c7a9c7f2022543d45077bc19d7. 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/BKCMX2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2977e6fea6cd506da51d3d4037285724f86ec0a0d47e6f04ead8503e244eb5c2. 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/BCA2A2300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8703d3e69b11d11731add32db8eca529b5a61a2f262e5ad15fcc12459766206e. 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/BCA2A2300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a15327a0489be076002f3de5d64eb89fc6e2b802f4b64b27b207e39dffec2e. 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/BCA2A2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e93f5938461e7dea83c8a1a11e9f48b39e5d6217b98fac04884050aef319c4. 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/BCA2A2400992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a12da02832ffc0b42c04faf6b44fa985fea01e45ed38f58cbcc85b88ae7838. 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/BCA2A2400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c4ef0dc3d839009fefec6482ce0a2792ad31e6cd294a046f5beee558cecb39. 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/BCA2A2500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322b42098ea7789923cb82337afebf2beda1cbd8d1f49329c2abd7147e6f8e1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BCA2A2500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3276146b24fd3b412649b3e33792bfc9c659b4a845ba47958f64c41b15d90b. 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/BCA2A2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1030c9ab7493ca2d43374494a5af61f6ceb87c6c103a782cb1a97b1d4f5042a8. 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/BCA2A2401123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5136bf5b6989b58602459d74ed185ca6e9a269e818481beda58d05fc274b0ea7. 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/BCA2A2400975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7413c5f2bc1a7b457a1b5d3c22cc24427961fd14e7b0bcc9ff4887c78f3f0b. 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/BCA2A2400440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2208bb606b9e3d166040df58d6e9bae243002161affe4dc8112864f43cce285d. 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/BCA2A2400555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427e5d6a5bb342cfe8ff61292b12e2a632b159e589fa69cf51cf98c0c778de56. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BCA2A2400313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366d6c810fcb310e80a637bc23bc936c482c048b9d4facf6ff0977f65a703421. 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/BCA2A2400029.