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 0xb640d6a342d9e8161645d9e550b3f7d8887ca48ba6acde2fc9c76a7e030f7f10. 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/9f126f5d-2b2a-4291-be5b-e48766aee4db.json and https://artists.proofprofile.net/proofs/artist/9f126f5d-2b2a-4291-be5b-e48766aee4db.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 0x8d0e55b84948e0ac847b18dcac4b6d733c333245c8d95b300448dbd446e46168. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKXN22394761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1173cdcbf2162d1c1696a3ba465e6736078ab1b02e735ed954024042148cd9d6. 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/UKXN22394763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d302b141bc43510acf83a839e99b54fa675a1643b226a18367a45ef1a1330e. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/UKXN22394766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988b33f25248c34c0bae59a29c963cfae01882abe72c2f4254e365ef26667e8a. 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/UKXN22394767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38843393e2bb869f4c8b127490019fa30f7a3630366f8df5df009c5e8a435491. 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/UKXN22394768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88835c841c72e30d973b8f5624cd35b9ca60b4865d660f705da4b94e1357897f. 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/UKXN22394769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101e14a99128e10d003fab097def385d11fe981de9d1d9a38f65957a57f0c9c5. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/UKXN22394770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a7b713b52f441866f71aa5653d9df9465f0c00f4410b47962978238ed275d3. 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/UKXN22397397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d59e208545f89f2c82c22b99afb438dd14515f9d77568cb64699ff43daf6a0d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/UKXN22397400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2380353ec61be043fa06d1d291f9ae3dd57e8ecf79b242b3a0b4225ab238456c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/UKXN22397401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45ea64466c2dd6855fb2447ae1bac5bfb3d6b463fd2c954902e10ac0ecbb1c6. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GX3Q92436017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c6ecd896a32b79bde36ed859d1380720aa17d0f0f0dea2b3a802d14fa00841. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GX3Q92436015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc118a764ee9c320cead524c9e3e479b5dd7b321a34c3f25c79c60d646aba39bb. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GX3Q92436016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92793d0053b8c69acb866adc29648b320382294571172fc10cc68e4a796139c4. 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/GX3Q92436018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046024258eda2234d3db1c5aa181f080cdde77e7b0fb0c7f477ba52c8be8e942. 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/UKXN22394788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b34d1e7df030ed71823e0003fe76bd5c61243793dff420e02bd50205040785. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/UKXN22394789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e52e5341cf4174eac06c8089dbb2afd0424f31fc031a636589a64c9c1f70be0. 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/UKXN22394792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc114e884647fa72ac00a8a546904c68d81a3ce5d3ae7d61c4f455b891df6c9. 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/UKXN22394793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee7731abe021267b7e0ece3096968a180b821f73471219e5058eb1717db404c. 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/UKXN22394794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e3980df82d35436b965e5eb5c56e70233db655f8244edde2b682b520afaecf. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/UKXN22394795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a49b51f4635a3e1c0147de39b92890e0b1f3b2929d8c9b08d00fa88b696840d. 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/UKXN22394796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed6ab1c8ae5b366a0297ee85cf4c7ddbf13ad736f98c5ae08789f356f71ae4e. 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/UKXN22394778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2c243739c27defc040375076744f1a479b769db71187e71a268d8aaba0416a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/UKXN22394779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1beedcb6c8503bf125732c170adadce9565d50ae829a1c2d96835caac2faf8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/UKXN22394781.