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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962fd67f728e9c16148af84b569af39198ac530002403b8056745c14bcbf0430. 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/bc57139a-712a-40b6-85f2-3b58fae531a5.json and https://artists.proofprofile.net/proofs/artist/bc57139a-712a-40b6-85f2-3b58fae531a5.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ee972ddb1162742820b5e079e9847d358f49cd0015488f9dcf043bdf030278. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/MMA031900379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17822221259412d28b78ab18cd5a45c5291c8842ca4804508a90aad4e5ba7700. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:10:00Z), 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/MMA031900380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7b0420d3ab0423463a00110c0d4543f1ebf38b0aa0f6853c100499fc89f9b3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/MMA031900384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2ac0d88eb11f685e574c17bf8f3e50a7293c5d4c4d8dd8aba13596e00b7bfa. 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/MMA031900386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03128bf02fbc122d3e4622408e2bcde7e244195852f7120344ed99b067aafcd2. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USHM81808390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944db66b983aef86c47c6e5db76b0de0feb272fc9c0b4a8fdc2f21569020be29. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ1965728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae995c8511bc8b67ab028eb3e866897522830848f57a385c29c993d57798ea7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGJ1965731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8930e1bdaf9b9899e56139192cdc7a96dadd797082eb2e4bba8408b77a35ab. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:54Z), 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/USCGJ1965733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b9f69e1698f0e7860dfbe0760828d120b26150f33bd3d38f91712f84c338ac. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:49:04Z), 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/USCGJ1965734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b6578f1c7e2d16ca4f0e7b63edaf2507760ac933cf270ed897e2aa1fea5bdc. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USCGJ1965736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55636fd64767e1c96d143f563764a123e132a5e60184a4413bb03c34fab054a3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USCGJ2087359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4014ff19401668f0436e026a62e70bb0fdf5e20ac178ad345c6ba121bec2a5e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USL4R2078846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c1ec83796ac6aea5c0a1589c85d07530b4062fb3084e9c47b886a5236fc2f6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USX9P2073077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7db7dad5591360867c080219088aed8773c73ea414ae838dcca78b090adf5b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USX9P2073078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562eb8683c4401de10835beb0d2b0e24166c3b889eb52bb4c9dea6a8003b228f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USX9P2073084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16fb97f435a3bc345dd0dcd2788f83734427b01883b8f4dd4049cb1c480cbdc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USX9P2073086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175c108d0e234375e149ca537a069757f2266c156c2ff310063ad48e26e2f9e9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:13:16Z), 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/USX9P2073088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280a01ecd9e5d92107a1a051ffcfd18e0c041c7ad9c3c2f1f69ae22084559c42. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGQ2202141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae8514bdd8c8d9177aa5fbde58dedda43be11de3029103cd170e53b332d4080. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA072469887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faa9b8fd2badd56ac92fb24667cde6683c0bbee611667f0bb9d4f5cc94db03a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR59R2566334.