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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 0x67ee0331d2a6bbfce88b40b4befc7d02552de7d4a0739d50c854acf5e71655d1. 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/58ce8f87-845a-4187-bf45-465636c96aad.json and https://artists.proofprofile.net/proofs/artist/58ce8f87-845a-4187-bf45-465636c96aad.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 0xe2647ea9d3d10bbb28aea3d2771a0f479711e21de79a8f72da101223f5c630d5. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USA3D1510056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68be9f4860ecc5f7d80b71168c5c7bc436cecb68a16586fa4b13edb319e253e2. 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/USA3D1510062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8f068e7315a8d9ed3b9047eff6d761b774754daa1e7cb024faf375597b9392. 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/USA3D1510063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc66d62f8dda893bbbab212f5d4e5b65df5494ec4be15c07aa99baf522fc7422. 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/USA3D1510065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6e602f99d1a58c41d5853896dea009aca5cb1e02ec314759f8d35a9662b3d6. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USA3D2034801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c307e30d896eb2bdf213d53ea3fed4da0400ec2b40eb50b81c6d49dff19e43. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USA3D2034803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c245ae4a6684947f5498f1b07fcf94efffd5870497bd3cb5627c8f449c81b1. 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/USA3D2034804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd910843a81c7c2ac837316f2fb292ecdf77840c3647693bb9d31a2c2730e5823. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA3D2034805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a70a1d8c74d199e979885d7e13d6ebb81aa14ecdb626aedccbbdd51ead33a. 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/USA3D2034806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bacd9c1b18afaa81249c0c93fa17bcfbce040866e913e08725d17ed55d649e2. 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/USA3D2034807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9e7d6d99d7cddbc6806b9bf704c08f81a8fd5fd2012863168779c81708d84f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA3D2034808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab71e5e0a28df7771fbea6bb8adbbb72a58871d2f09934d79dec6b6d7787d9da. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM6N22132378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798c90cde98a1632a74bb36f91a748d8fe6c090a4c24d30c01d8845cd4b99bda. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QM6N22132379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81383a4329dcca9920c7d8bbf098c2b46567931469866e41f682d386ec54adf5. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QM6N22132380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1d073227ad3daf16762016af067e510b43c723d27ccb1433ccd1a8293bd201. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6N22132381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7df0d5d7fd205817664260dffd7862fff259190455ef5b351aa008fdbd9e8ae. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM6N22132382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606085120ab6e353461f9195e0000107054adb5597173994ba211e260c8e7331. 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/QM6N22132383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe481f8958ec72e6845e96236ace100e9236e5805548e20d9b33ae7c075ec065e. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QM6N22132384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47db134a934abeb67a034c268f541599ece1cf496066e48b59b5eb5d307198f6. 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/QM6N22132385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57fb87fe75dc7d43a00230c6a1ae8baf53b19c6e1bf679d37bd86180ab0808e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QM6N22132387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84579d6f4910a7701376b6bf69af9faced70ff808fa04c09dc57f9adffba5f3f. 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/QM6N22132388.