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 0x98b45b452da81d7a20e1ec6d89d98808cc5fb98e40f82da48d106460c6850647. 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/177a06b2-6011-40d3-9e58-1e13e5e72ccb.json and https://artists.proofprofile.net/proofs/artist/177a06b2-6011-40d3-9e58-1e13e5e72ccb.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 0x6547d60c50756cd5f520f36fa68a56e8da4f4654132953e82a1192b3788a7a2f. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/USUM71707452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6db52799b85021e72339307e2c9afebfbbabde901b2fc4bc0e9e39cd482309. 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/USUM71708660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f872fd0b08958fba1c67b15b5144c195b0eb1618b22dc7eee0b5a420ed51b0. 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/USUM71807237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e120b0d434c5821a7dfd7b5fd4822ed9a095d02173a83f4891a8d6e064b101a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USUM71807617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3e8a21e3c5b61f908f85015df4fa0655bb7c58ffbab190ce864f60432f8ed6. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZ93L2050794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb844e384db225353d046133fe80549fbf993139d8270d83e501060cdf3dbf6a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ93L2034767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa9da39e4f7330280b29ee7879910469fbe56286dc7230bbd0939e1e349a695. 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/QZ93L2058369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aedb11823cc2baaf4721d880f87174e3c0c4baa65f963eea4e04f9aee9ba03. 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/GBBRP2300953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8def9e08a2671a86a097b501339ff2058a1e4bfd6b46971ae896f34dac4207. 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/GBBRP2300952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c52c43d58c9b9628cc243640d83cbb5cb3f94370181b3e4228336d34675580e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBBRP2300950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577d03eff7f1037a061e063f9d35dd1f95d2f272127d3f3067d8b43bc0978e66. 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/GBBRP2300951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8def9e08a2671a86a097b501339ff2058a1e4bfd6b46971ae896f34dac4207. 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/GBBRP2300952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08a398926c1446434a0914351b081ff2d4417bded71ec88932654ab97c672c5. 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/GBBRP2300954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061cbc012945e5a22f39b0b64d778b4d35df86d1ae73887a92b52b9387848ff7. 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/GBBRP2300955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8222420f2ffc25a61386dfee7076487c3dd48ef3e9d4fbb8e74a7ab0910d32d5. 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/GBBRP2300956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec139a802a6ccf19aa671e4bfd254837c0a3b7bee957127fef863a94333a7cd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBBRP2300960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34870a6f9b29f8df804a7be8c0e327ea31bdbe75bc27856313cf1f0c0f6ba648. 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/DGA062429032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dec917f432a7cff655746b37a0909068a19fdba4108ecd5e7f56cb1524b79f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GBBRP2501425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85ace29c863cab06367e927e9cf461901923e1640ea69e4b18901dfe014f86a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBEWA2101960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f07a62e4ceb8cfd51b990fe91a338427c5b9f73b86c5aa77700f3216b2b2864. 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/GBEWA2202182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85ace29c863cab06367e927e9cf461901923e1640ea69e4b18901dfe014f86a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBEWA2101960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333dc8f57dba52273ddf536dac6076d6144fe16730c3ab6223b8f0f6ab4b4b23. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBUM72300858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bf2462b3ff464d9e47ac2a365dc10e5172175bdd773ab44ebe5d14ebb9ef1d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71806252.