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 0x2f47b12efcf5d6e02b42be8a64a0f787f84991c3228b39c4c5b98dd8e0f93f48. 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/13378f80-211a-4eaa-a1ae-1612c332f5a0.json and https://artists.proofprofile.net/proofs/artist/13378f80-211a-4eaa-a1ae-1612c332f5a0.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 0xb0375dd22da58d14c0067932d564bcb914cdf7ea0951ef209a4b30d9592dff91. 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/QZTBC2407794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93c4f221d07760e91c5ffd6c4fd246807f6b2d69549b61e990c0c40bd7afee1. 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/QZTBD2461241.
Cuando Se Te Moja La Tarea (Funk+ Slowed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762f3c7651ab834bbdfafda702fda154b5bf318337fa4c27f4b7a4887f79bf1b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAJR2588193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3822ab0279c1b188f188229e0431496c53e9bcf228f57dbe3e8045859e5dc1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCAJS2505953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320dee197780b05a632b65ee79edc94b3b445f147847101634944f2d16985e7f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAJS2575476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d28929e72ccdcd106f27299ab0796127f5b261b5f25be28cf3322beb5eb6cf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJS2575524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d5dbef54ae4068068a34e28e6cf54d106557bec0040671fbf7ed9c08978cc0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJS2575536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54a1b4a6c6e39bd92e96159dd8613f449043c973ea18f5b325078e0261058a6. 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/TCAJS2543779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2000904d8177bcf0ff54262fd79fc838d9837a088db90521d474122cccaa545e. 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/TCAJV2527474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e3dfcc0d2ec0c09ba609ae9cb979ed577cd2a529d0832804be2494cfce83af. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCAJX2523539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1331728738659b4c13f5b0cfa0b633321a399728df1b7d71b26a69fa2a2d63b7. 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/TCAJX2593142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2fd50c91b5529c4519c779edc8f9b4c49fb352dade2af6ddb30668532e026a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJX2593112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7f5950865f25711528ff6deb23a16ceedb67aaaa041fa1cadc7ac3ea75520a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJX2593209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4951005339a4c4094684ac805d93adf63f5d20423cb7d96b92cde7eb925e1cb8. 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/TCAJZ2534174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb78922d9f2018bbddebf44a8f513de7a68f81e2c135418014ad3ceafb1f9f8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT65X2529152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44be70a59fa5fe8ef6d1d541454a2722f6ee040c38eccee108ca3829c114e15e. 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/GBMA22617743.