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 0x67c31619c83ae362df29f9a88adc9c026491f877cdabf023b26ff217fcbb0487. 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/01d3def7-3298-41ba-954a-bbdffc457688.json and https://artists.proofprofile.net/proofs/artist/01d3def7-3298-41ba-954a-bbdffc457688.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 0xc3cdfd1ffe1531e553a7ec270080a96899e5b03a1b01380cb4738f41a755c6bc. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GBLFP2419649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f62fe94fd084832d558961ae928a470fb819fbf84a65c2df51fc84f39ff386. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/GBLFP2419650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde025b94b3dea52ec3fadd22f84bd989735861d8cc60cf91b0898497fca52702. 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/GBLFP2419651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8690f1da115c711fa4879856e000fb3eb6542c98e303fb8c676e2cd359b568. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBLFP2419652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8bbf7fef4101281fb12a82906678ec7708bc22273f2a369e77b4955d2c6be. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBLFP2419653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c76cd339d35836192244a8bac2f4d0369b2faab1496a16a8fd271e5d18ae8f5. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/GBLFP2419654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c05b00d05c7b65459476489eedb8286d87875031910776fe8a47f57683d5bb2. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBLFP2419655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84ef6c78dfb546affbc412e377bac13cb1b45cb9ce827c1749a6d49e74680dd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLFP2419656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6f31d4b92165121427830cc10f65a017b11c13b3c12a452d4eaa674db2c6a2. 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/GBLFP2419657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35acaeda2719ca5c6a8ed042514cd3a347497698448a070e7e058d3fb23f4c32. 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/GBLFP2419658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a3b39089b065d3d3960442803b2d8c74d9472fcee05b7b1c345bf439e32b45. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBLFP2420320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb532ebbd7e6a92e5aa64ccec03413a7bd0af979362dc8afb4440df95b6a785ab. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GBLFP2420321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7754bae4dcc85a3b3fad13b23e3ebbf276567e0087f099a66608470a794633b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLFP2420322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21917abf36818ef1ec1ea40bc0f8a46744cd963d343d0564ec7b76d3b2d8f1bc. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBLFP2420323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1653b3e82c609ff9986bf53be06a521d2493df28b3ca4f5b6a2af99c5e0ed24f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBLFP2420324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4f728acb9c8fa0aa0b3aea22bc3bd197c86fd7a5dd4c76b5608602d827e6e7. 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/GBLFP2420325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faed0be55b419d113b73fec596ca7cce627a4de494b65296506139677769c2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBLFP2420326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702764867e2af4e074552dbdcfc2156dd2c646ab87e3a53cad9919edd6683e9e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBLFP2420327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf736b721db98e1114bd8a90a89d3a87758cd5511e798f65b87f561973b51e650. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBLFP2420328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5c730a84cb538b6e68860c6ee0ec81e069d584f2447429a29af1149bc1ed31. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBLFP2420329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8be220738d1ff901b7fba6803ee18e30a6c62703acb8f3ce3a42a21ef4b84d8. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/GBLFP2420330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff70e722e36af10dd90a3949c64e8f063100666fd26031633347bf6c2c875eae. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBLFP2420331.