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 0x9d593ea57c9b13dd747cfac4cdc8b292fd9bef61184efc594044cc4c07197867. 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/15f931ed-8fa3-49b9-964b-bc68338031d3.json and https://artists.proofprofile.net/proofs/artist/15f931ed-8fa3-49b9-964b-bc68338031d3.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 0xe30487be4107fef30e3c6a4f9e7e5f8cc335104bad706a792bd0661c82bd59e7. 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/QZTB22205091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f866013b16319fe5dbd42b845793e1bef9919db07897ca23ccec14b16ceb513. 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/FR9W12413410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8725f59fb91a96240f838b93b74b9bf2a8284a062387af29722915d30d5dcc99. 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/FR9W12413411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff98e91f29ed905dd51527874f7518dfb4b2ecf490d7c10f13caef6309618fe. 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/FR9W12413412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281c83e987e918435f3707a1bce0e719142f27276444948ced86b82630e0368d. 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/FR9W12413413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a4209c35e4b8fbe0e2908b9b81496b9e738851b6fee4e07184bc61804d5599. 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/FR9W12413414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd8b19a47ea7c0e1e16eca059a00f645992d0a98158763010fc1fbdccf13b4e. 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/FR9W12413415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd679ad68231372a1d487fedad76ec0839c1b3ae878015b67ad1358aab247baa. 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/FR9W12328206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc337b891505e8b023586ad44ac4955527fb017b25f157bdeb707b7e2def5e65b. 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/FR9W12328910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99775bdd0c20953755cf4678051d7a6ee53c8325d555036b5828fe77342ed714. 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/FR9W12305323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190f5232d4d1072a0329940c0bcfd9223e0373234e8a071118e72fdd72532511. 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/FR9W12305325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f551ce0f5c717aceea078e5d20082932bc0ca3a7d0c171c6d91b90c6b1693d. 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/FR9W12305324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cecee1c4fa41cc356ff8659a1be7b4307dd4b27285e3d47c90b72a235bb697. 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/FR9W12222165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7c03fa91d621fbe15cc6e4ea780816ec78b5a6f25df264a5886044738c7029. 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/FR9W12212929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0787239a99c4b8db412ab8e626ceea9238b21c63e3eb55f7b81c5986519fc30. 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/FR9W12203373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e8688c548890fe1c1ec06246385bb6d0d5790407482157b93b914f90d61675. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12203374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3dce644ba1af1b5dc8ad896f598ed7eb145a33e7d4917670408d7f99e3a8cd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR9W12203375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30487be4107fef30e3c6a4f9e7e5f8cc335104bad706a792bd0661c82bd59e7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTB22205091.