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 0x9c602be01a99cf2b2dcb91ba31e153b43fa346b3f95f358d4b97737a7dc52ac0. 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/f8c53f68-e9cb-4aa3-a5ee-88ad87153df4.json and https://artists.proofprofile.net/proofs/artist/f8c53f68-e9cb-4aa3-a5ee-88ad87153df4.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 0xfb43150848e255cf6326a6faf7a139aae19d1e949dfa2ae446f049c1058a5c58. 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/FR10S1623343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bd00b24976f3f2fceca8603a1d6b27c59a14b9aa78a4eb2917b0111138ea51. 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/FR10S1623347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8ec5e36ff923e53a8f11cda258f91240f72fe9a210da6e2aeba8b264f78590. 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/FR10S1623349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe276d2120043b69914e758a5ce30bb125035d3f8c0d6edd1f906c7006340699c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X41665787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb4fe3f6492008b8a583e4a6f4510776a2f5bd5693b925ba9695900140f5730. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEQ121748971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa373dbe978779501d4210b72ef2e3b75602ea0f3b55416511b1c3d079fb824c. 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/DEQ121754080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa373dbe978779501d4210b72ef2e3b75602ea0f3b55416511b1c3d079fb824c. 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/DEQ121754080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36ee55871b59103ba0a2bec773ebce1a93cceba72081442627e02d04234da03. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEQ121855403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5d372de1a4213a79d220fbd2cbb4e93efc2b71c5f357479ceeabc12fad9869. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:35:15Z), 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/DEQ022006709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b5988355e3eb4d53743739963511c871e26391e762f44446e7dc80196de321. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEZC62323018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace88c08d8a11c775fba418b335c5ab295b8d5b577cbc8f014d32d02e493f2a. 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/DEZC62348048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b3c393e9ebeaee8b90779b801bdfa4becc207628f785583defbaa08c8f9c74. 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/DEZC62405336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be1a248dab2546c25ca617ded7fffc39a9b8bde6996d0567f453689245bf103. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/DEZC62444715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6b00bc8e8d934bfd50c512a317ee69bc33c4ef18ba33357b4fedbab046af68. 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/FR96X1732662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388c7bf547d2b9b5ff7c30035d9df67895bc7f59b2ea8bccaef66c6a6bb2323a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:30:58Z), 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/NL1AP1917162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57adf9badfef359e7e941530e5c60dbf934f84d41d5530fb45bce07b026e7ddc. 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/DELJ81806515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0e76ad7e0e8c3884f4a8b30bc2111515b445d754b58ab9aeeddb4544952f39. 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/GBLAZ1701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605ebc6647e9a2b485bf1f0633467c67878af3729d845750e3c6fdc229c5d3b3. 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/NL1AP1921393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d99f6b6cadc3cdd8505cb865b9766e2e7811edfcd655498a5dbb70c1f699b4. 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/NL1AP1921403.
RETURN TO THE CiTY (Level 7 - du weißt, dass der horror nie endet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d2c000a836b94edc8e66ebacccdbbb5a3ca576584d7101b9f349f7c51a9409. 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/FRS182024078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f170ce14606a51456c9bc087d9819b7f0235bf9b4e2a9c6ea38a505c9e658b4. 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/DELJ81895385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1badd9301f972fc7de3a48b07fd3d9e405d09113dc0e400c28fb8a22c3259858. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEUM71604868.
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 0xeea9c9366eadda7041d2581e01de2cf867623cf08d194f68d99c13689457d87c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR10S1645997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0ff6e618d9e2e57c40c5518784df1ca61d3cd4d6979639f0823d9568554b5a. 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/FR10S1926178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a64fe655dcd2cf1c667f8dac214f6152ecec8df18e31c2b9d0124e68f52912. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEST11500092.