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 0x3f5629b4acddd992ab4b5c844959345e49a586f4e61e5ae6214f185cf636c6e4. 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/90fdde31-808f-47d7-850e-cca0e3ae4f1c.json and https://artists.proofprofile.net/proofs/artist/90fdde31-808f-47d7-850e-cca0e3ae4f1c.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 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 0x4d55256adc14b65ee76a9dad1cd7dbd0e0d4c33bd6ee9467b287cdaee708dddb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GTA011300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da9b6a5245bb3c0f1fd799c9c2797b3a88111b6bad3243eafbf52c30d4e39b0. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GTA011300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29378a8362211bcb11faac57025db3c5a47a16e8c6a3cb6eb545b60983c25dd. 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/GTA011300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec400953200db952ca6605527eaa3c4ae45a63a9f524343b6a3b696c02f83b4. 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/GTA011300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabedec34ec453b61a5cc320514a9fc2d3b02aafcdc16f55fe59b109cb26f069. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GTA011300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4222d8a0589fb331977b4f2bd1a2a0327919231a55a072ed96ae53bae157cb58. 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/GTA011300414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeba02ca8cbff8850557afe20e8082437ab5d1a9c8aaf70604c276e99e9b7628. 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/GTA011300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480e0dda79c62db0ed62321e4bd747c474e7d3e62c993e9c6c8492c2a1163652. 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/GTA011300416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3433f795da11f0b348a96e42aee003332aac5f6504a06cb743b2f03197beb039. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GTA011300418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd9bcbbd18616642ef7578705616c58df66fed3aae2404961e4d6600f34e477. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GTA011300419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a9ba8042560e1265332cc4a1b0e8b6be0625bf981af0474f218569bbfd7f64. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GTA011300420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d61750d2c4dda8809172343b15cbe738482c11f5776802235bea9b999da1bb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GTA011300422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2cc05c5ef13d2abd0b86bd5f9c4f8c9769eb8f3cfd4472c2c721ff9522f1e4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GTA011300423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e49519773e3f6b01d69f0741a2c47246795fef6fce9e4902baf5adefc6da3ab. 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/GTA011300424.
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