Chan Chan (), sometimes called Chimor itself, was the capital city of the Chimor kingdom. It was the largest city of the pre-Columbian era in South America. It is now an archeological site in the depa
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 0x87d30a2795beec411d6dd9163d32b8a47e58a606bc26e40ccc958ccf7610feae. 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/593d9316-4022-4feb-ae0f-3a02fb8940a4.json and https://artists.proofprofile.net/proofs/artist/593d9316-4022-4feb-ae0f-3a02fb8940a4.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 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 0x85bdf5e0e55131a57cd0a70321900df4179e979c0001d76ec0a2c1df2eae1790. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAFF2007797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebd8a9e0e3eff8e013bc42a5fff170d6145bcdb6cd3a1c7440e4882f6b2c987. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEN2172639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0fac95533a9cd643f7a5b73a6b5a62cdd82ae80168edc436e79aea69c3658e. 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/QZMEN2174102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c6799123c490d0ed7ef72651cfcb586262aa872ae136a7a562efd10ca77b1f. 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/QZMEP2104364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59945ee446cc27581d161d7b8989e18f3ef8aab74a0f66ff5ee27e29f2ac1c6. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZMEP2104377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5d770cb23df5ab88b98a2e02f6b93595543feefd9871bf6568ffe8091115e6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEP2144922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1285a8fefc034c661c2694300404491f13f0c46a3e3219bfe1e59c48506675d4. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/QZMEP2144925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765c59d434d98a5a05d7878e32dab5f1b167b5b8b3b1a5f474be987b3b167b8b. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZMEP2144926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ce225b1e2978433b4a3161655bdaacafc654c1a77a89183ab116d02dc58f76. 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/QZMEQ2104166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bde3c9c1c0428f5e281a271e1bb50033cfc7e9b3c17eebedc80267a500103c. 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/QZMEQ2161327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010c7a828891ad5b4f1d4c0237b801867950519bbac16362e4da84dd4fcdd31a. Chain 2 (Bitcoin): anchored in block 957626 (2026-07-11T23:22:04Z), 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/QZMEQ2161334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89bd17b81478f0101d78a267cae874d1a44119a89463593c79c47bdb53ec7d1. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMEQ2159588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea3c8371fff5f62929d72c9645bfc1e97c03142252b2b97ff60ad1dd8b15fa0. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZMEQ2159589.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246923574ebf9baea8fff771cd9cf0c1bfed1699f7fb3651b0f453c34eab8c4c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTB92201888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54d132c476531462abbefff2884b2c16b015cf0c9402909cd88ee69cac79466. 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/QZES72563231.