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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d124e643e2f944a63d938bbb56812590bbd72b7f1455a0703216effa6a357aa. 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/86e39a70-d3e6-4172-93f1-d59e14756237.json and https://artists.proofprofile.net/proofs/artist/86e39a70-d3e6-4172-93f1-d59e14756237.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe617eba671c07dd60effa7030cd67c658b10f69116449ba39b603a8a1facc19f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:02:14Z), 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/GBJRX0500131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55d543d8f244a3c25ffc47713bffb6ca459c18740386960160c960f587f7985. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:27Z), 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/GBJRX0500132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fcb330fd2a59ae4de2a0e09cb4da3a4081e504fb44482b0051e397acc2a49f4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBJRX0500322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f60a3f178ee8594cd8f7b8b3c2ac0f8ffd9f2f480d6e36deb22266c9e71a04d. 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/GBJRX0500323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e00e0f699049ac61a41f18f470562d9a05b924799ae30556067808c30736a8. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GBDLM1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e05fd0df77dc4a32cc91f4767252a19e74eca6d413d3b2cedc237a821cb38a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:30Z), 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/GBJRX1700119.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f2897bb0dd2b1ab5f64a19f108338c9088af0836accdaabb10a192891df52c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBJRX0500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8662f3ce3b452297721219c0e17147f1bb30c44a88118b119c0e73f66bdeef. 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/GBJRX0500274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5603e27b0e8df4dba051a2b9e47593d5e192bedb73eaa09fdabd90bf9411db57. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBJRX0500225.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ed6a1b0a065b706057edb1e4d7446230fc89d1a56c2e788ab91b06042b7eb3. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/NLD682002316.
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