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 0x8013fc05c7386ed27e7f84c8b1f9fd9485a7d549a233283c13c66ea71be7eb71. 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/9209a65a-3ec0-40a4-9fe0-a2e93f0e6ec9.json and https://artists.proofprofile.net/proofs/artist/9209a65a-3ec0-40a4-9fe0-a2e93f0e6ec9.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 0xc57ea7f9199283687ac00f4a4ee43fb1ed561790379e823d3824a8552073591f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMBZ92317446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16566455dedcb4774f9b49f76339dac5e33204e33711d94adbe2105315467ded. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/DGA072315765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26a05f59a29070d9029e2dc393b878dddd5ac11f4141cad2113c59772878bfb. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/DGA072346139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035aac8b3bb0efd01f3d9e268966b03374e3e24100ce07eac5cb3eeecd1f2f34. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA082357997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40041abc5b9e6098ce80039081ba6934b4aaf76cc47aa79c1f8f6d6e2f6a790. 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/TCAHS2325252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195be22d080201eaa1d4a5383dacc6b9143f6767ef4c1ff43e5bbe6e844fc1af. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAHW2457345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8374d3d2c95849db72f4457f4a7d479eb089abaea9547e5236bf26b906bc9a3d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DGA092448085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae146044ff996d70610d99dc989b31db993a94d240e66152f3fa2ed795bab4e. 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/FRR642300639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae146044ff996d70610d99dc989b31db993a94d240e66152f3fa2ed795bab4e. 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/FRR642300639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85965d849521acd3637e107bbfa95177b2069dfff86693aa2b87cd94848e7a29. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAJK2557680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfc00016d5b3bba8e4bbbbfbf0e2ef46a9653578839a597b0cc2ac9698abc90. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/FRR642300633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbdc4869d4d9bf5170f5b36f4478c39daf72b88a9c0e21bbad108fb3753656e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAJP2535533.