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 0x7afb47d913259ac6fd757b519f49e6ea9fec233acf3ea861c8682e348a05925b. 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/adfaf1ad-f203-46a1-beb3-d190509666fe.json and https://artists.proofprofile.net/proofs/artist/adfaf1ad-f203-46a1-beb3-d190509666fe.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 0x0eca38797b056c6bd7f261a0b41b72a86a8708569e0a896daa54dd55800a3a1c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCADZ1870402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d5f27026b2ecba7784cdb17e7f38c150e70028bd970944e4a8ad34da6b229b. 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/TCADZ1870404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b6631c3ec0f03174086a335630661bea8463b7affd89588c2e282a004419b6. 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/TCADZ1870405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46c850aca55fad4a67baf27650342eee88b76994c506b61d06e89c3ceb14022. 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/TCADZ1870406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1b28bf780c9d64f33e75de5c1d7227fe823b79a7a222ee1d7e60535040d978. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCADZ1870424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6c4f52ade07fe794225ef999cad990622666f9bfd5be7e66fe678265f017c6. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:32Z), 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/TCADZ1870427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66da096299d89c206f86bbbf85b40d045beffd9ce02f18a51188b30c972827b0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAFD2023692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd81c9daff7ea9de695c3fe0845eb00107d94007cdf7d5a920ffe95b07e2f7a5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCAFD2023610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50633b8c01a6b8fe61f11ed4fcc92095fa6770651a1b970c6b08489fdf9d279. 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/TCAFD2023622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a871f62790f276c0c729fdc518352ac80dd77615261aaac342ccb6cd7bbdc. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:42Z), 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/TCAFD2023557.
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 0xc4d12f29213ea52042a6475b7b997166f03c9eaf91bec592f2d91d8e0868fc37. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCAFD2023593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a7b30a4900cdb12867fb7473ed69e5737cdb68f27d3ff1acd8e45d06a0d280. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:20:41Z), 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/TCAIP2483056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a7197177a19563a37a421577a1acf7d465e9588a2c1337c7439945910a0f25. 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/TCAIZ2429257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be4e6b034b42189863ff1bd7ba2cda5e08e77e506aba78dcb2b954672dbd32f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:32Z), 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/TCAIZ2429278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1886e2d823759bc4959717a53e1d5b7f50d49d2f60324144d3236499c61ccbb4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIZ2429312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74f133cf1b34bc5d79fa3e51502fd59b1e0c4d90d3c3dde70cd7e52a3ff976b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCAIZ2429508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e5bab46b8e51b4f8ecb5adfc933d82da09b826600606057df8045be2083a86. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:15Z), 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/TCAJZ2529615.