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 0x9a47a5c71154245f3c9c35c18c789111be3c10184ac53c2e3e1330db1d122b3b. 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/473457e2-eeb9-46f8-9d73-8afa620eca29.json and https://artists.proofprofile.net/proofs/artist/473457e2-eeb9-46f8-9d73-8afa620eca29.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 0x767f31dde8e4bdf22a6140427be05af6aa27a5ca746b71a7de36d8f1d5a4f113. 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/DEPI81704948.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61914fae6e7ca3a3f4ca29ef249337e362050b249d1143c4190efe19c381f7f. 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/DEPI81704924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548928129d0e55486dc2b4dbe324550e59a2cbef8ae435bdb308042142d205a. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DEPI81704906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ba547ba785f173821bb8ef700183ba3e863681a73a353a04c3fbd2fe252329. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/DEPI81705034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2780c799e388b89389f2198fedc27dcb6fd8d05f57dab14c8d7e8fe4e2abac54. 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/DEPI81705035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8d103614ca8ea8324aceefe2662bfe761195ad32a43c5170ee8385ecc27d38. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/DEPI81705036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837c9d21c99117483702f283766f0480a7d1e21d6b1e20d0908b90b9ab67c156. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEPI81705039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257d4e96145238555d80c780ff2ee7b53afd9cf22ff24cdd5bf26cf009cdbbb0. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEPI81705040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8547a301d5131aabdf39039ea136ae57c8785fcf4f6d29ed614bff581c584da9. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEPI81705041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2771e3e4eaee7ef9b2c9c3e9d0ca059a10a23468fa3502da9252061472ebe8fb. 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/DEPI81705044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e072cf8f617a8153b34b05515cca2de0eb29fcb86cc7cdc9873147ddd56b857. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEPI81705042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cc254b7a0d683b104d518abd1aa37059fe4f4830ff6197d57560eeeee3ebe7. 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/DEPI81705050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcf93814e79d5268208df23e1c43da1b3c3a12cf58223c5c84648c2e856ce51. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEPI81705045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99a07bfa804ec2268c5d58a483d717807c127529d2c3cfdf66915fc9756e3ba. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEPI81705047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949fe6dcaed121f298d2e8c1de55506e7551d17e67a200b020d320cdbdaa248c. 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/DEPI81705051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf52866cd6b282e6558b70e76dff39064ba3fd329ae1323e7beeda4114f58d73. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEPI81705048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60af0c22f2d8266bf3e00a2c18372763f471324bc1055f902bed208b29234ae5. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/DEPI81705049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7507527b457f3bc7bf91002a14741f72152a71e9640ee5b52b21eccac8dfd5ce. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/DEPI81705057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d9a5f095508234860edfab3afe419597cde99934b4ef788bffb0b96be5bb1a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/DEPI81705060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8a466c0c61af29e590d57be81cb1808eecd3892f17942cc0c7b3536bfb9613. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEPI81705061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1b5484b7b316e9d8a761841fe875b99a468f9b0d82e82c84ba0a6e9543b0df. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEPI81705062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3d4bfea754b1c3e4e933b9b8419f8222750b700699c052520b4a73ea2429c5. 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/DEPI81705065.