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 0x7ae8804c1194895e0a05845d57321c59c59d48b1a6891ee1b04929227260fa7b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46d499fe-4d87-44b4-a26c-30a6072df7e7.json and https://artists.proofprofile.net/proofs/artist/46d499fe-4d87-44b4-a26c-30a6072df7e7.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 0xbc2be8fbdf84f1a6d42ba2e89c377070e6f5bc3f9b9d5617b75f0c47f1051a0f. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:54:49Z), 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/CZA119909003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eb08b6fda06d0d04dd046ec7212233bfb2a0e2568553c7799302134b5058f2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:36Z), 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/CZA119909004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652931340a95c093b45d83bbf235cc2630b822d51c2d8d551a320aba265d4039. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CZA119909007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47426bb60ee0f1e73ea7db19af4a3b352a53813c96ab2063374ef9e8401c2aa5. 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/CZA119909009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d3a4c3035fab11ed670678dd38aa32319b97851184e8c5cbc5ad8afea01074. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CZA119909010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b52b6770bb8936db3de4a8212ee24136730b505637fd70c956f8ef4c89ecdba. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CZA110102012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2578904b2a05593d0f62cc9cb04ef73dcc4ed122f0149c174b8dd3f87ce79c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:07Z), 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/CZA110102017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b59e68c09b952415ae742df52b5ec149be84f208be3f85d1deb0f953c4e11b1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA110102021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85274e1042708252149456da121a86826ecca6e6f6063c2057d516b9b9346992. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/CZA110400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bf84a66046f573b2a8ba1945136db8f3a37c72f0650378f6e9d9409f3ef559. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CZA110206025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc55954c907d69c9d60466b32edfcc9f2b364f2028cd9bd4fd2c45c6992a08. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CZUM70600180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6816163f20449d0e357bcabe9d8868b8e797c40d60d93f4562beea761bc970d9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CZUM71001066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a29ddee59e40cce625827191d4f6699a3eded45bb28ac8e6f931f2fd7617299. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CZUM71100489.
Mezi kostmi - Live At Divadlo Hybernia / 2013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee82eb02a2cf754c91e1dff296265f659bdd71c9e622b4a5c392e8b8992015b. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:15Z), 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/CZUM71400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd7224f74e493199caec261b0fad1245d53ac9fc871eb0ef422f77a7937ef7f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:13:37Z), 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/CZH681700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81055c60b6c9d62c74392cef9d89a0aabe5acbd277a7f7611e991ecfa33339d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/CZH681700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52cc92a99dc945e3b7ed156cb40206730ebf27bb08c758023ec6fb4b57ca456. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:50:35Z), 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/CZUM71100491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0155fd96b8325fd11a26531a68f5ff439d5c8dbb5ec88e8211a4b171734574c3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:34:48Z), 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/CZUM71100284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedec2c0a110b06f0cfa507afbf309485e832cc58467e3b00aa89bc2253d47b0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/CZA110400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476b99693066c00819d03c4772814d3857ec911ae06dcbb87c8cabe6a31f8904. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZA110102016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92368376d61076227fb4e36c89b37dbcd09cf8853d7b92bdfcd1a4ffc36de7a6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/CZUM71800272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7385cf4ceadaedea941729e868b1a6e0fb473450003bf28b41b098f3dff12e43. 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/CZH682200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a0b6e5ff2efdcc745c3e053b4f8c259935b8dc1c06cca9515b2c6f5bde7ae0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CZH682300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2d1f1a99c1d91dda7afbfc3c151e9496ef7214641a85add89a457fe3eadb40. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CZH682300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90391070d7327d04577197eeb6d6f00440e609301209890c6d2632c3c83881f0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZH682400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb814f395a68f48d066fb4f95cdb9f4782f9fa15b76b18204c4e602ed87b2d1. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:05:14Z), 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/CZH682400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70472a549a9b54aac38172e54ff97024889db0df7bc286432f0666329acf9fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CZA110003026.