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 0xd69cf244ce5450e0d66d59ab2667cca96e6aa6f069a6339adac491c28961d8ae. 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/c1b532df-edee-405d-af68-c72b3291663e.json and https://artists.proofprofile.net/proofs/artist/c1b532df-edee-405d-af68-c72b3291663e.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 0xf709c7e232fc3992574c6ddbfc93a6a15da9983ffaa5446c8aff1ff5aa5c2711. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/JPR502151641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b31ca4ff86d2506228c46f9e1c86331c01c7ef88f104ff3a6c908f46ef90e03. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/JPR502153545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b431ce47bdf7dcfe752b8e903c37c6b7996f14579e66b36cfd62e1ce054752. 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/JPR502205506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35b431ce47bdf7dcfe752b8e903c37c6b7996f14579e66b36cfd62e1ce054752. 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/JPR502205506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7605e00ef46207338cc57def25e576c8323ed460775032601825c05deddbd256. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPR502206153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7605e00ef46207338cc57def25e576c8323ed460775032601825c05deddbd256. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/JPR502206153.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779e0bb6657fcd4e8687629431f865e22e9bed23dc45e7d188435b672d325de0. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPR502207359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779e0bb6657fcd4e8687629431f865e22e9bed23dc45e7d188435b672d325de0. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/JPR502207359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60537ff1075ddb11c56f5aa1d3f550cf492af4b6797587fbfc169a8d9f15fd29. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/JPR502300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60537ff1075ddb11c56f5aa1d3f550cf492af4b6797587fbfc169a8d9f15fd29. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JPR502300531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe480b65502ac87e1e0d1d19e0ef30df4ff7dbc3dacee2940eb0f6783b4bb95c6. 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/JPR502300773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e41f656af5b56940a85649c4386d4657d8f110d368ae505ed918bac5ad2967. 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/JPR502300774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc0029b6d071c0990aa87beeb52c47f9482b37a05a4c1a220465f7a1b1cccf6. 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/JPR502300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa961f4a07aee2cf28fce0b98a89502259341c16445d7818c94d8c3c419b5a64c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPR502300776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d5ac016eb477d6f788f78c7bd0a4031d0867c0aa1aced8cc6eb3594cdc1989. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPR502300777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364346cdcbf7266913633ca0f812927fdc95fab758d2dde722b3cff1fadc5f8a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPR502300778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe480b65502ac87e1e0d1d19e0ef30df4ff7dbc3dacee2940eb0f6783b4bb95c6. 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/JPR502300773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e41f656af5b56940a85649c4386d4657d8f110d368ae505ed918bac5ad2967. 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/JPR502300774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc0029b6d071c0990aa87beeb52c47f9482b37a05a4c1a220465f7a1b1cccf6. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPR502300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d5ac016eb477d6f788f78c7bd0a4031d0867c0aa1aced8cc6eb3594cdc1989. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPR502300777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a9701bffbf96c132ea18db18862d6730a0a7dd35c287b5042171a6c09ca127. 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/QMDA72312356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373aff3b34584ea46b8177cb442dfea77db6596ad7ab178bb525807e22e2c3d0. 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/QMDA72368997.