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 0x2cd839f9a064050b21f2ea26baa01452c348501192d2f67a921969b7a6f755af. 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/fcfbddd1-4c27-4544-99c4-fa5c569091b5.json and https://artists.proofprofile.net/proofs/artist/fcfbddd1-4c27-4544-99c4-fa5c569091b5.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 0xea8e444a4fade783ccd1905ce08e4b9df96058d91c2707fe149ec84ddb338193. 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/PLA552100393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7580ef4101233669d93f555eed37bbf282cc4fd08c67b107672a30441f8e04c. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/PLA552100357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6fad8397e595e973fa19d9ad562ef54dcc540a415b565eaacff545d513d72f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/PLA552100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09158e2a3de4c7b075479f98a69b1142377f51da99c7f99dc74ce02207caeeaa. 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/PLA552100360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79de78980053044bfc25cfaf4c6c0b8e11c226a6cd516c8c503c8b87d041c143. 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/PLA552100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8e85a6715b94c7dd153239b96b353218da03b91362247080b23f6e84a38667. 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/PLA552100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4581873e7324df122c488e9546ab62e1ee8ca669eec3e220070bd3415f4a3beb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/PLA552100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead97d52b560bde2ca5f8339eadbfa500eb68559a5e86793af9a6f9305658d71. 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/PLA552100364.
White Noise Baby Sleep Vacuum Cleaner (Low)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650941dbef0fc7ff7d5304fce1cd924d89850f9ff67fd9c64bc620c2a2d609cf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PLA552100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ddbf9833ed4e24245a9fd5e6d81989f4643e4c500c2040c1bb0a7b56a72643. 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/PLA552100366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a9351075fda5b17e4b2c504092cbe4f8bf6e82e4e3235bba97742300035202. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/PLA552100347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12465544a7dc1ef569baad60a6c2b507ff8aba7e683a1277abdfca808408ba7. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/PLA552100348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13044c85990ac4180e2cc4f36f5b72eb76b1f6878ff754ce2733b825f9ca23a0. 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/PLA552100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32947c160600f82f418da807c2f9d4eac1de3dd745cb93dbfc198e9f30c72ac. 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/PLA552100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10edf23c3f1356c111ff5227fdc6d1a8bfd8e980256c9cab98f9a1315a2a054. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/PLA552100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099cc3bb0267d5ae23569bf2d9285825b0433e257eff58c4615b9ce1dc589eb9. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/PLA552100353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8216427ddf8710b20b53447a10464ce3115db8a22ae8354bf800a491962efd80. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/PLA552100354.
White Noise Baby Sleep Vacuum Cleaner (High)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaf45f28976048309fd27dbfcec4e410482d9ec2e31e803e85cbe3dda8fbfe8. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/PLA552100355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb152b748d25e9d69cd0289c5624002f89c241352adb1a4305d03911386b1c849. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/PLA552100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcbc92151c7b6d7bfc0d57e6ba194f2ea7692c5966546531af466f5b3444516. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/PLA552100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6258debc55a29da88e3166ceede2549135bdc9dffe910026d7b3954201600692. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/PLA552100403.