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 0xbf0a9cadd6f080c022f1f64118785f5f722b3ac6898ecc162beb9a6f6989921e. 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/b784e3f8-865a-4343-acc4-2a70ea24971d.json and https://artists.proofprofile.net/proofs/artist/b784e3f8-865a-4343-acc4-2a70ea24971d.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 0x67bbac0615b24d5b890cb26687927092c13e7476bc20ca9bb3e267eb22758067. 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/GBSMU2199249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e587f13058f1bed41899e2c2b284ff85eb922b3d466c451e3dd67d6b5213c7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB82480123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6135413c7597654d5c0c5cb956bb84cd9f44a6db8c6338806f89389813a2ff76. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTBE2490537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a81e593924674e9b348aa906b2439fcbc7013214630f7d38a34352834e3130. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:39Z), 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/QZTBF2492815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68be4d2c9f469f266e7f8ad5438e0884f07c1ce3691ad8797ff29409ac8d4168. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFH2468807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91fdb198084c148f43dc1e92008855f0d8cf7a4733e88b8e5eae979fa17b68e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZWFL2460504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01ffcbad14167c7a546e03b0eec1fb99271d272729908a62a5e7fd1c1f17ff2. 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/QZWFL2460505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7d293d4642241e140725bc9fcdd23104cfc5a35699c2b08274d61eaf1db572. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFL2460506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0e306989ac37c02f325d7d0cde23b528995cb6830651672a2ecbece274b11d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFL2460507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886721e1b6f0b89c7fe28324c867b3c58e90224c595ef37a8d73f1f11ce7839c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:15:29Z), 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/QZWFL2460508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd4676ae773000c081a9625d3c5fa47b172f326effe06045f9c14cf30a2195. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFL2460509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8716cbf964b39e58eac749670812780c610ecfff34a57cc4b3800de7102bdd27. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZWFW2482624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5398c0805a2b80094508d5101c34ef1dbf2d9149f4ab47474543b7b882b6ec. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFW2482625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0250701d96339937f97eae397a585271f4b0f7c656c360032660c8101978aec. 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/QZWFW2482626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569944becb6cebefaf86dc948a0c39cdad4c4e730373318f5bb395f871995258. 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/QZWFW2482627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce601f91a1f1b0c5af9cdf302c523ada636c63c637394250fd94a0508c2a547. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZWFW2482628.