thumb|Jai Singh I of Amber receiving Shivaji a day before concluding the Treaty of Purandar (12 June 1665), Shivaji was later conferred with the title of Raja by emperor Aurangzeb. Raja (; from IAST
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 0xe48b80c84a7fcd525702d884d7aef46420ca7531afd725196324eb75c0e30652. 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/87213d5f-758e-4fde-9434-604621b52c93.json and https://artists.proofprofile.net/proofs/artist/87213d5f-758e-4fde-9434-604621b52c93.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 0x1d283b3febfe30f927a6b5e66a1149364257298453986026b88157f146714796. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX872044584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5b2403e1d18d91f16ecb9fd0d459cc01eef150dfe2b731b68fd181c4053ecc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR59R2191749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6026374c8ce001b7670a0bd1e0095d15488a1ffe7275cdb0327aea7251d7c919. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR96X2126772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597f5d3e9e9da08094557e9d5e724fd1cb3f225f24f80a4452ccbf74a85a72d8. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/FR96X2126773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe593e32d2a1bbf7d2c8759868301b95498896f18f19b24066051746979fdc9c5. 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/FRX282166143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b9e7cb36472983759e93525eff6e164c91a64707c3317fbe2b688a31f4370. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FR59R2214764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa391d39025491146128a160789e7f5ff65b9a76b52799e4dfe5e23fa0007e. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/DGA062201598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eccc28d9ab6a0ad534f7a7c4afd3dd8583bd6cfd9637169101ec7a43c9cae3. 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/DGA0P2349607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb83edcbfdc08e836333b242c603f962fea7af39e9398883cb74728d6fd5989. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/DGA0P2349608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bdcbaf9f580ad6f35fa91bb48abf76aa050db628282c3b2f31a547b4f754d0. 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/DGA0P2349609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d31efb774dea914b6309ed608a1a6866937dbdebab505b0f4c53fc1bfdd942. 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/GBKQU2448740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb00328c07b0ae3e57e19bd33afaf84f1f96c72556c9bf9ef0d461be138be5d1. 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/GBKQU2448742.