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 0x777f576b9195459524e18a6b90c61c7af749c326464fca0c79eab607ccd21618. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbe3f4dd-fe7d-4f66-b758-0aafd0de685a.json and https://artists.proofprofile.net/proofs/artist/cbe3f4dd-fe7d-4f66-b758-0aafd0de685a.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 0xd3ff97e3565c15627c96675a1ac61acd84e7dbd9355b749f97647d21f8cb9396. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BX7T12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573af2b5328f60aca3f16e81f8e9a45dba9df3698287cd51d6efef8b42b38e60. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BX7T12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0356ba5ba67ef4cb31d7c79985056d0d41460d5f5955526edcb5e03250885cb. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BX83X2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bd730d8a9da47a026cbd398cb56e0debe947d2de94fc9a23504a9c598354b1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BX7T12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f9ad5d1a11fe170da95b76ec00a43fbb7cade52cbfdb6368c7e80014ddb0aa. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BX7T12400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc881572f82eca0494cf904fa3b2717d2b930c201b337f6ce9436c632e941ad03. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BX7T12400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041c92a0ddf24f6371eab668dc0da2ff85319d1db976771d8f7a9390d2667ca9. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BX7T12400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb476738d0180dd4951c17180a2541a2f345194ae3e6d21752faac36599ebe610. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/BX7T12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85015485d563bc2aae222efb35644bfcf414ff7ce870e26d0e6e7a7cb01d9f10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRPG22000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b989c549cc13d82482c918e5e31e98e15b91539f942ba96b454d5450803328. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/BRPG22000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40828a27a8b67cdedf4291d55731e80a3967dc992268c18791480b82bd029de2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BRPG22000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c49e0d2dc53a81e0fca041c14b4085cbe3e1a8021cb8cd4e679b038aa3f710. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRPG22000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67d06552d93225df4fcf6076e6de2fe61aa9f5230ab65dc2b22858064bd8206. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRPG22000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc655a33b2ae647b451d0c9a34550fbb48cf17e7757fd9b018440fde2bf55e08d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRPG22000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b41e08fc3113bd9b1ec41d4f210c16cfe77e03d756d721e12547e81e1de7823. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRPG22000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7539a7b895388d805618c09885680a408d1514887b421ab7c5f9c94a26c0f30. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BRPG22000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9271c306689dac47ed9dd5cdeb8aece827b5d7ff3a78d41e938b52e2bd38e1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BRPG22000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f133ccfc12b184bcc2890dae4d3672085c1f31f60fd137861601fb2ce14ef8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRPG22000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cb0807eccd58296aeb0bb8bb8eebe5eca0adb94f4d83fde52c7771c0f09d83. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRPG22000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d49b5c925c97fd15e72753a878bcaf452b62dfc8b50b96340ca538232d4645. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BRPG22000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67b92638da3fcbfe90b4805d51f01e74ea1e47610ceccf0c00eea77b83c3887. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BRPG22000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aafbee8e841e9c15f8ab1645a2d8261501c53bf5ed92e3711f41fb86c1a1b86. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BRPG22000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4eba26fc6bcaca280aca2aef771652043e5fbc89ee9222570038c33f12da1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRPUI2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be52da86ee70f40bb11accdbcffd78fa1f2f1ab5bce7f198931a892cea2135f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXPCC2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85015485d563bc2aae222efb35644bfcf414ff7ce870e26d0e6e7a7cb01d9f10. 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/BRPG22000001.