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 0x037dc27750e363ee2c6d476e76e43932279bb4e8a3e29d77d61805424cdfab05. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c82c4128-4d8c-42bf-b429-cf52d503108e.json and https://artists.proofprofile.net/proofs/artist/c82c4128-4d8c-42bf-b429-cf52d503108e.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 0x9a9fe61c111924d4ca74466029c759f5a8863a07f54203d48f24ee5943e17d24. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZHNB2304508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d46566851402a12e8e4ac828d41a015d708430f5d96dbe3a9f1a9c2d86970. 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/QZHNB2304511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fa1de083e583a0768fcd9ed23dbdc883ea7178a98436bb89cb776eac2f387a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN92338067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1af99d20964385e8fcd0b0b1e1c4b7bea30167ee351b75a5aa4f4008548033. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNC2366416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2b8552ab52f5468961104eddbd976f490c7ef3e8f421c866c44fb402c76c32. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNC2366417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb249a1a3f5a2a216c524144992bc6733efd61b20dc47d4b06ab0af22deeaf952. 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/QZHNC2366419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d0655065c9ded86419bff33868a4eccde53d462e572742a973ce60b3f843ba. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:20Z), 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/QZHNC2366420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bef8caa4db2baaec22268276be071ad95467980a03c99c69029bbbeed5ff24. 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/QZMER2318619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5484a1fb10ce5e9022a293e2c4c1db86a7d5529eaeb6a6f9b4a7b6d58b7084f7. 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/QZTAY2302692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8ea1ff316a6741da635d8533ff12e5a535fee8d6a48641162109abb70ee575. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTAY2302993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa85a458430fe4fee80bca2df0221f4b95e61caae65a096430ff07e7eb5667d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6N2488293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd3e735ddd5d1b698db142bfb7d118c413d0d2027b504c73dfefd47a0286d95. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6N2489055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77179286b692c0ad7608b3efe4ed87220ff7164ccd5a1bcbb5e014e9c157bf81. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:35Z), 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/QZK6N2471760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6376bb57512667c0d3caa13be5fe44b984b8b8efa08e6897c320ff33ad3bceb. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/QZK6N2471769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244a4262c5b024e2b24bb1f7020b8d0ecf941f977a86982e6ebca0d94d6e0756. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6N2489148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe494105114309590737555313a4fccbf05ce7c4ae2c924fbceee3cfa1d0d9b6d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6N2489198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb9ba3460ab2bdbc017bdb874ca4689f4e250bdb706b000b63d8a3c1caa2dfa. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZK6N2489200.