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 0xd127d88fd3b7e2f5f92f177d8f65d7755d6254db29848b03d45bebe97a805812. 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/ddc76233-63db-430e-a466-74df1f808c7c.json and https://artists.proofprofile.net/proofs/artist/ddc76233-63db-430e-a466-74df1f808c7c.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 0x7571b6b71019b0a06610259fa17887a528a506ef46dac8050ac08b871214a18b. 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/QZHNA2541952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d9dfb9653a8d70c3f07777514d1284ce2618347c3b71d3028207f41d1a697e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNA2541953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200ba07dcd0a5b8a80681daa887f0f544951f6e7f6e963f6b59e2cbfd1898338. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNA2541954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787a9f64606289d0ab7c8a13889d0c40eaa244ea95172360b82b1dcf11557bd9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHNA2541955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c33ea9e1fa0c5bd85f01d118a586ff30d0ce8e802994727f8c86ff40e96bf4. 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/QZK6G2599348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a82492335615d85282c4cf5cb0af483b48908d1e6d3b9d6e58ef2d8a01b2bd8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6G2599349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a68d87448990648718fa4d2f022b48bd3367bf7bbfee9d42d2335580661e89. 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/QZK6G2599344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96db76120d4cb74729d6cc848ea1b229bf6be3c63ef10ed2ca3ced16860103a3. 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/QZK6G2599345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213b0e5d8967f2acb2fd870e92cbef878bd806ab71b878571730de1d0493189f. 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/QZK6G2599340.
Polenesian Princess - Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da2bb2960cb1c5bf5439a76b4999fb661997a5d7ffa97390a28e96351ca69a. 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/QZK6G2599341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83370bac611a6c48038227624ae723a6c6f81920f3d3ec7fae3162578c3eb3ef. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6G2599318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ba7d9d77b4d1dac8f4e9e2daa45c861191b690474d1c0f3fe5bc1e27a132ba. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6G2599319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6531c01c3c70a767e8643dcffe50c3f243b6d66042a321218dbda05e3258b3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZK6G2599342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbbf1b77375e6c4a7b0e098417a16dfb763344770bff577ee810b6839999ca5. 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/QZK6G2599343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed30f8377e08d4bfc49b8eb744217d1a2f02cdaf96a6ce8834d3d6fc376e6ea. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZK6G2599337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309b15489a9ad12c792c8e5ef6fec441af6652f5f8f08d9c057a36022b8dcb7d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZK6G2599338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182095a23cf62db775ad9ecbaec6448e205491e552353d4bdb2348707c08f61c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZK6G2599350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c4d422ea39f132b977e31c230b49038ffeb9bd305a2868532182e77ea9a8cc. 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/QZK6G2599351.