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 0xd8d5a45ed92452249ced65580aea8f7be5bdf1a7e4657f05e7d0b14867bb4bf4. 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/2fe00312-ea0f-4746-8ba7-2f28daff0b42.json and https://artists.proofprofile.net/proofs/artist/2fe00312-ea0f-4746-8ba7-2f28daff0b42.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 0xafffe021fd907bf6bb9e666c4f1f274a2443379e5a164107d15cf21737ecb36a. 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/GB2LD2110227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d0186f4f3b1761a57819ff3de9edbddacc475bd5f512cdc5ae8336b1c09cf3. 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/QM42K1705831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78049384f8086262f8c9fbc81cd0ce8b1431621a095933a729b3b55c31697dbe. 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/QM42K1735293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750cc65a69da26c0c6a947dd43538e3da7dbf4fefe0bb8edcb6c626fcc4ce139. 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/GX4R52260256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4480724afdcdb1dd264353336b2484afe2a578e7cfbb20bdf8d79724795df524. 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/GB2LD2010278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac038fd2f9830bcc0e6078da239200e0d1f61ad1d3a497b914879e7d87451fc. 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/GB2LD1900431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330fff20263a2616bdeffcf28d78849d6469e8fda62c7974771b0aa4f3137e21. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TCAEJ1906424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9056d5db26b19e58e06ca52c64c43d01d6bc104131448806bc024dffeb51f286. 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/TCAEH1946864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab49212c8dfa67364765b754651c2a29669a4044a199d1aa29035d17efd4cd3d. 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/QM24S1911795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f77ef94586069c1757640b8c58c5e54ca4e807a92d7081ae088b644831d3b4. 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/QM24S1903598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6d541b1a35c0c026c401c34cd27b86898f455be63345a7bed72b0b9ad9f3c5. 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/GB2LD2110222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafffe021fd907bf6bb9e666c4f1f274a2443379e5a164107d15cf21737ecb36a. 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/GB2LD2110227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d09424edb65bd0520653968227b385c606ed1c4924884fdca1c54f06b9dc9df. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GB2LD2110240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffeb77ee904f8b2dde747eb8e2b39ac256c983732d3d0a95ac5de2acd864726. 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/GB2LD2110242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36c5d3e912833dd67d21586f84e4020be73ca6f7665d49a9b8a7072946307d09. 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/GB2LD2110243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c174b63ac527a70067890f97d0c5cca01e1cb69f5fc0abf1c0beb46b9381c4. 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/GB2LD2110264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8fb9d1a0deddb749c3aa7a8ca550835aa2ccb5148d542c0dd508c2caf44042. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GB2LD2110271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1025d10132062b6d9bac2455b033d93f6c3740095e5092816c02050135cb66ad. 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/GB2LD2110238.