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 0x845e16ac7a823cd5bdb13f989d36b6fdce0310849718b2a104657f458c81aeab. 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/e0aa9344-f9c7-4e78-97f8-644a9ac5d3ad.json and https://artists.proofprofile.net/proofs/artist/e0aa9344-f9c7-4e78-97f8-644a9ac5d3ad.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 0xdc0c21dee144f2c538bc1ea9edf2a84029f071fe7d9a56b10c14f727234821e8. 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/QMBZ91982668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26a915cf0af4e87e1a9c41482efbd2d200a622d118f67154845cf31f934774f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMBZ91982670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1f4c12c254999cb78250a47c77c129604d25c1de1e935438625fb66ff7a46d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZN882205199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0bed0c11f272a9b890000203affb90954a9671ad8ca6bb415268dbfeab0cd1. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:28Z), 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/QZN882207697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b1a6eac692430dfb3f5c6f3eda0b1bb90a433aedfcd16f43ea13bbbedd5297. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:07Z), 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/FR59R2216194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cfbb37c7dbc68bb89f6e8eaf3a086dafaab1f2867e88d46c402ec6dce147af. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:13:17Z), 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/FRX452269456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ebf3b2eb74e416b2f19d685d0add26c075279e9d50aa0a5b09579e460cbb62. 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/FRX762264707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483e1f334ddd240c0e9f7a08035efdfbcf7435106afd631400e9880609a413ca. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FR2X42308180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c3fe142e6dd5da57695f30aca1ade264b87a4d75bee762e0cce12815d1cce. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/FR2X42308181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8d6b63a747fe0c3029087b8ca893836883e2f86e6d7c2f651d8f7bb9a35beb. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR2X42308182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ce6d4dab50bb6977b1537ce7fb379f7863e7ff1e7d29e15a923e226f5e23ed. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:51:43Z), 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/FR2X42308183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea986405c4966cd624a05bd1c9222bdf9488e0a68b2c69de7f83d4d95455bcf. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/RUAGV2301131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4d1265460c9356457f6358b4b6e6faabcafc5b3d3979c7a183dbf3075a9f98. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/RUAGV2303740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7972def73f64159a2108fec87507c53757fd9302ae080718ef8455b7a90ece. 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/FRX202466787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036f45e78ded071a2ea89162cfe30d3a75006d90b9c97844c1034836510ce00f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:08Z), 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/DGA062444944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676560df60b7299cf73a34f0cacd658a78b3235e6a98f6bc3fb89543395c6b2a. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA0M2460106.