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 0x94f4d6aa188fddad0b2e5213e80905b2602ae35a8369b7143ce9821d40252706. 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/42ce5059-acaf-4e5c-a244-827ba31530ef.json and https://artists.proofprofile.net/proofs/artist/42ce5059-acaf-4e5c-a244-827ba31530ef.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 0x8ac1536943273ca2bed7c75eef3f3782a184a74f1b757252a843d072d3ec8bd9. Chain 2 (Bitcoin): anchored in block 957676 (2026-07-12T08:20:25Z), 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/UST8K1625839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e10431201d554d2d33789b2dab6c083f58c9ac3e63b2e49e99711e5308ad100. 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/UST8K1625840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc542eb5a76adbffb77a5fcb4642de037a52fc114e0ac6c4eeee5ebe1f8db6c23. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/UST8K1625843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015b033b637b412bc85172e517b86635dfdc1bdefa8c5fff741e830561d60ec2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UST8K1625844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5268892eb769a70e7041a8582ef8cf24fb4d373c7354da4da2e689112cc24b9b. 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/UST8K1625845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898e5ec8f4f136f92bb0a91da7294695cae94c559065501fdf036c23af33d9b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UST8K1625846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128a2e91212cbfabccb3adbf63d8aee296a3530e6bd6071ecfd5704373993d80. 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/UST8K1625848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7435a1f1787fbc89055503d08de732bbf0eb7394bf617fd1a38c65c4b86b65e7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UST8K1625830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c0e8dc6d0c125257feda5ea711c344e1c4916506e07ba96efa661da55df41f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/UST8K1625832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc419c551d121e40ec4649afdcd57b8739e604537b8ba2629ab54737eb6f8b38f. 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/UST8K1625833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d479befae13f2d57943a92f12b541dca87a3a90b0137a1b37fb607a6b8f3cec. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/UST8K1625849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ddebeb89a89c5106e76749e8ad8f229e2f6ac6d43e61a8d66fd2605c060baf. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/UST8K1625851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ae80224a8d7d28a833f97f3712b21a61680a8d00f79e80751d9f0b9904d1dc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/UST8K1625852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b0e9c0f2446e701e47d06b7e477480905ce7a5b6084ed0cb2a3cf409452a09. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/UST8K1625853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7114e5d1b808cb58ebb0e15b0fc6f5fd38fc3eb03034ff034f06af93331203. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/UST8K1625854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae68bd9f402cba6b11908f00c86c8608102aca4659f6d7de8ffe85d66dc615f. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/UST8K1625857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd042f311cf4a3ab5d26d5ca5fa80773abd25167f23d700fdeedac4fd260116c. 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/UST8K1625859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e331be130d90c16fa6b577e954682c36cc0a7eb99f533bd892847fbe056c2c0. 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/UST8K1625860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f58c66d180e7c1a8dc52b39eacdf9febcf239b210b29d60ec8d790199b6c58. 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/QZ9Y21767732.