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 0x4a1ea80a4a8d8988564c6e777fa9873140b09343a67824657eb7c899d79d7695. 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/7e8577ba-1649-4b59-a24d-7dd743b7ab2d.json and https://artists.proofprofile.net/proofs/artist/7e8577ba-1649-4b59-a24d-7dd743b7ab2d.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 0xe956e06e49b917a7bb92cd1f3f71c981f8c9b77f065531c768ba6e06fedb79e4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMZ92096723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ce4e7ed2046f9f722a396251c2d62ec9a4e4749491e7cdf22ecc3c784b1278. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:01:30Z), 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/QZNJV2060696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28684a0a5d0a3de907ff11fcc5c1e98a518c056cc685ce957793e81f2a7835ca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJX2031730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f610ac7c684bda42a2053b843abaf3700c888b1e7ae322fef527f97c1ccaa0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US7VG2294089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22e154e3c7c51b11a0256a182e5de86e2a0752462f32841748d58a9b1d00f03. 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/BXIV82434690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a544f00ea2acebf59d49c9419165993ccddf148dfb85b646aa83e44161e2c9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CACWV2433817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cff6b1feed75832fad55316056b9193701b9fbf81d9f09b06e6ee0ef5ff169. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CAENV2431632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb70786de8359626c25e3c463899139526a7b51d79a5ebbafd2782ac2d99e1d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAENV2431633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6cf9523f1deb402e1e9e6fb2291040d89939d95291b6b6914acb31174da0b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAENV2431634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03eb0a05b1cf2bcce5ae7d868f2cd38da457cba1b492f8ab51ce36c94dd81ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CAENV2431635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe96272d3ad6fc53bb2a20e3ba318b71b91923fafa2c6204d6f66f6dfce6e4f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CAENV2431636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9307b24d952af6352b3ae2dce63767ee6791afad5e4135f5034c9ba1fddda511. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAENV2431637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6431fb71b477afe0598efea8e6779642005c55681fbfda55bf9bc098bd887cc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CBF8B2444251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee82685284aea23f6fa6b427e2a1be2016eae9b7ffb6c0791c59ae6b9ef831d3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CBF8B2444252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba130e931f8da3d4df1acfcebe52e102304468e6ff60183ee9990d049cd058af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CBF8B2444254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fd7a81825962079d0b4a43d6d9465172285851db2c7319497dfe70167d0149. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CBF8B2444256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ba2bd082f5ffab570153535552627fe05d40d1c12873dc627d1a15e2a13a87. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CBF8B2444258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4520c60ae4f071a9724f310f7684393fc32a922c52df94da92dbb6b98ab93a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CBF8B2444260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b31b357cc676028289100b7644d18919c1401b40b1b288ba2f7d34032549bd3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CBF8B2476906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eed1792be1e7a820690d40de01d86b78d8bd08ec4d51be10c584e9f9f7b4e04. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CBF8B2476915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4838b2e7d29ef527c23611fdcc047f2e82a5eca0cc63cab9a3bb93264b90b467. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46c4af6c3d23cd29fc1a532f40105bd55f76b879614c79feb542bb946526632. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4f79d3d37a8d437b4ec7303b0cdd13f65363757032f0e8fe126cb4c28b8d40. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cc2cbc2f986a903831eb27258a36f4bd6e37f0d5a9cc953ee1d0cd4f5c93ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbfccf9e81071613eb3c3d736f3cd465a2073315b2cbe3a6076111d3e5ad836. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af5f592c668bbca43d96f0c9d57a2a63f81657015f17b74184de413883a3469. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa415c85f9a632edecae7fd4fc777655a14366a7f2f67eb43ab722e72f3761de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXJK02400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bf719cbea1c8bffacb6ac9e12293d3593a54bc2743fb5fa6349212557e87cc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZGLS2080302.
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 0x0cc6248acd8d3e941613917c83be4b371fc9961a6b48e123c1ff2c83a16bfbfa. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BCHPT2100007.