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 0x83268acbb8da387ce01290d3dd806d552a352a3dc1725680e14b23d435d3e80c. 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/9ca3f3bc-8ddc-49c5-b8a4-aa81299293c7.json and https://artists.proofprofile.net/proofs/artist/9ca3f3bc-8ddc-49c5-b8a4-aa81299293c7.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 0xd148979665dfe6fd19ed3c55652c35cbc3cc1c45953f7364f49f2283e9277c1e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKEX32120274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8493724db40780d0e8596a5622c1174e3e4ad23caa5bdf4bced672434d952d8d. 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/UKEX32120278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ce57c327ee69a24afddf03bbc33c9c9f8fb7bae3106b2635bf0447cdb44ba1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMFME2199387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576bc4dad4d52d12b7f532c775d5974911367683164c5a52b34bfb675985b712. 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/RUA1D2163096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697edfdb1ebaad7a4108f74638c701c9f5f3f1a8e4611d31fae133c38caf0694. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUA1D2168244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077d81fa5ca6836e472dfef56728b4b6b0ba774d1ecfb1aae09b8fbbc6889672. 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/RUA1D2168245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f816cd3877322f5e189c43ab1deaf04efe4bdce98d3ca10c9070b3df8d9c70. 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/RUA1D2168247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75f1f0e80c876d6315fbb60e08ace64da55b2f3f34d884fd0d0e56a7debd021. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/RUA1D2168249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e29b664fdb9ab4e63c74bc2692b062e333876e1e2dfda16eeaf5a9609e3712. 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/RUA1D2168250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0415001be061d14c8472f6950672835163dae4a66343c86f977c8a5d206ef4c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA1D2168252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a194e3c610585850e503500f75be01e8ebfefc3346a743d90474dd32fc74ff. 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/RUA1D2245233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeafe96443ef03fdf14d5eedd48c42c82f51259a54e7bd6922951c4fa4585108. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/RUA1D2276374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe707404619c94905d7a8da7945e1c220170bdf785092619df068225180b4463. 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/RUA1D2283715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dbd0c0537da3a89b379cda2f8aa0c92ebc1bde626b67381ea7d5ccf6957026. 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/RUA1D2388369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeed8b07114f3efe1ed03a24a253e78ae406415565a0ab9352c5125b2e55856. 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/RUA1D2388370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77b630d32e04bc79a0ee33968cc6d60e3f796941bce927cf7615a7f40b6839a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/RUA1D2388371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fda1daacc4ba3231cd6de344056e028c55b530e3e60789707262d8696c2827. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/RUA1D2388372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae46e12d81cc50047d844cba2a32f5a023c1e447a409f113eb26b6a8f474afdb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/RUA1D2388378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f92060cfcfffba6635b109f7ba5b302ede2b1394f46ed3153e56917f963812. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/RUA1D2388379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61548a87d8d774dd263a8135e5c2277b6574f0d5f7ffe749ae9b6a4f56faa4f4. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/RUA1D2398474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269e7f5ba2af9436e9b605abb5f02491308d1ca5cbd5a1ac237727223601dbe8. 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/RUAGT2334422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3669a73541bc5bac4b93bd0eb318c80db7b8508075fce509560e0d548cadee. 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/RUAGT2475426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35889837fcafb64bce7280c2d2d94db1f2b71f48a67e5f49bd2864bb722dc0af. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9K2470894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3669a73541bc5bac4b93bd0eb318c80db7b8508075fce509560e0d548cadee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/RUAGT2475426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f13eab3e8911754620321503d3feb5a11f032b80ac57f9c5139390cb5aa5e5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZW9K2470896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf622296dc0a17593761f1be6cd210a7175281f6dc14672e68813ed37c375e342. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZW9K2470897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab6d8fa9c6a5e1b31b200994d61c6cc5920fff7f51ae702b939436b8cd36d7b. 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/QZW9K2470898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafca6f6e2eef6d8f502a8a236ba370c5e0418f379256b2870ad3eb2fcd152278. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/RUACR2402417.