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 0xd56a7aab881e349b503f5fea690065b472eab75a5d307a93660ae778191a33ee. 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/862e313e-e8a5-4000-b147-0b624abf6a0f.json and https://artists.proofprofile.net/proofs/artist/862e313e-e8a5-4000-b147-0b624abf6a0f.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 0xdbf2dbbb5659914a6c93a00a5a12210d46032b090b148e59419ab597dcf099a2. 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/TCAFM2126301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689cd042ef8e0c03c5785d5278d56ed1bc09d2cc4c9b7d020468b4c8134b1878. 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/AUBEC2160576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ab6e47cdb22d51f1cebcf562351d65931784c3f67ec5fd7c703a34f66480f8. 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/AUMEV2404484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72cb398e0d08158e6fdc9fe0c7642f163fec68ab56cedbb580cf57aa11b396e. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIJ2496177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c52b3bf90423c169cd41ecc95a49186a6aa9a2368ed3691291c79d15b26e6b5. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAIF2495245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23454ea01d7f41be1f61bc735880f7bea809b79756f3abdf20eceeacddb8b406. 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/TCAIQ2470510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0380c7e60b2806beaf357e7fdebbefb8cca46d9c3c64461bcb9497d467b1e607. 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/TCAIP2447968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebe8a1c44886d193a0461850c30d7bfbcc13977f7a181e838b97f4fa171afeb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIV2465987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7517f698621e8128807ccb030e66faebfdaf8215055f77ec15f4f569f78b73e. 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/TCAIY2448648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921abbeea59d41c7ee33e3441288550efcf30805d344e4f0951e17aa9a3ac00b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAIS2467920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb95b307f01d02ad89a087cb6049e9c7a87b7f5868df23e0780275c7c7d8d2c7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAJB2400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b9dff0959fcf63f4e934615a5466dd70a4ab3f62b0f89d3f67292de4ff74e0. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJS2581010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f5e9b70e8395cca3a259df00b0a89d11fb63c7818790f38f24d9050714baec. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJU2586625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6247707319f4e1fc7fa6720403f62441b0b066401f57ff14c146c874c9a26c1d. 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/AUGBT2537076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82481ac052845182c0c466a7a5ef482d565bc8e9dc0e212d32c9a3f8083bf6bc. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/AUGBT2548911.