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 0x5f953d14a9a87e523b9e1236b390d02ddbde339057c5b40570f613780c8df944. 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/e0978eac-bffc-42c6-bf26-a4e6f329c27f.json and https://artists.proofprofile.net/proofs/artist/e0978eac-bffc-42c6-bf26-a4e6f329c27f.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 0xbaa76227a8be5f7adf9179a9e02e39b7e3f7e8035f4bccf5a657dbaa141969bd. 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/QZDA62319988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9772af42846176b2419c67bba1cdedd7fa3022f3f1636ca88848c07f88e8c8f6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUMEV2367956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e34cece572ffbb1838b1d53da8741203a2c90065d7da34b1727f2fec2b2435f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:08:55Z), 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/AUMEV2373164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7c2013e2d403e1b07c191ed8583c5276d7e28664563d0b5d84e1e28cbd027a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA062385267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3671db7b2dc944ca913e9a9d51322ae21c691bf9d12761f3744beeae2a5a83c4. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GB8KE2319046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331de5a2133ce2f8caa15d2ff96765b7324a57bbaea30818a9b0d0f515b39f77. 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/AUGBT2329100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38cb2aa0b4d734d11d4ffce54dec3694206e9799002dee4a97b56eceefc8bad2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:41Z), 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/QMANG2254279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb468734bbf166bf948a0324451274e8dccf52b66d60ff161e7337382b4d44a1. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/CA5KR2472587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330b9283596e392a707ab35b6d2f00d82338e3ebd12c8c07807a234c08bedfb5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:10Z), 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/USANG2407725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22b0e7e34d09c6120dc45ce06cfee87e5092d3eb835ed1650d92678f065d75. 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/GBKQU2490691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877401b15f5f213f79114c329b740ac360c58cb0185988bdfdcfc62557b737c0. 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/GBKQU2490692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d9870c3734ac1a7329d173c38f9fc5c571d1f231465d25f4630fe7c72c326f. 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/QM3DF2402477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1117158b744d7572e9ff7803cf0b9d1972f7d5c7ef89eb6f8c017c8f40e3c38b. 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/US3DF2525270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769301246e62941c852957ab3cb28b2db931b115826171cf1c4bb48037a25bef. 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/US3DF2525269.