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 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 0x0ed09ce1a208d946b0327cf988eaac70c7b242468368b6fbeb56494fd2b40b3c. 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/f44f76e2-f12b-4aed-bf03-f6cc7b65a2ed.json and https://artists.proofprofile.net/proofs/artist/f44f76e2-f12b-4aed-bf03-f6cc7b65a2ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x26d55ab1890e3c00d1aae3ee5d71cb8cfc76008630da170a47cc94bbab37db41. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USSBM0101804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf607ab9b77bdd4a762877a6d6ffa9de7418a5b6cf890b733543b335ff2ad569. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USSBM0101807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c517a90a674547cd994a266e70da0b7945941c1b4a95a5e974a2a8332bd5afd. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USSBM0101808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b19452e1ae89cc2799f155aa3fd9b25ba3a248f8759a685bcb14f2e1d988542. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USSBM0101809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb7e43515c9ede3d15b90ca1056c85df2692a951b0c07ce065b9dd2afcf9e3c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USSBM0101810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cd6d443ea0c4f670364e07bd3ffb109c6806031d411fb6f4f4940a63e40819. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USSBM0101811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c992a9bab443391efe4cc143ee19c18ba21d53c0cf2a9732206ba62f7e241e. 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/USSBM0101812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3348f75d5114285994ce41c9f58d8512c2bc0f4f0168cc8971be21400b752fe0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USSBM0101813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a92ba5f96e52ed2141b550e2a2fe31b8470ebaa57087f86024d516a73d4b68. 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/USSBM0101814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856b36f24ff7b94f3b2fb55c1227eff9b8fc193a35e53e1b734673d128efe17d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USSBM1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8e0749014fad04081f89365b763b434097dbcb0411c0c72469743b1da8bba8. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USSBM1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a94ba861a07a90e229906749775521e61a15bea23564623004e3a77baa54d52. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USSBM1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606dced785f44eb39245918714ac7a671a11c24e37a7594c7e31b288f90f893f. 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/USSBM1700005.
It's Always Something. It's Never Nothing.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb082f43b27670324a4338a7523e23b3eeb36b6752649f0f40821ad895eef459e. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USSBM1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657b6c332346c5454606836ed59587a37325a4114b3b55a19ffd2a2ec4c433ab. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USSBM1700019.