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 0x3d2e1c6360940ccd26bb748d71fcf371bc9044336d069e025e5032bf88a6eb6b. 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/cb94dbcc-36e1-497d-b244-8e927364ae0b.json and https://artists.proofprofile.net/proofs/artist/cb94dbcc-36e1-497d-b244-8e927364ae0b.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 0xe5bc6b533586cd206655e3eb7f9050874645457caef082d885e6e965b6f1b15f. 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/QM24S1834244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b13baace34b3bfacf4d69b576a4a8a021d86cc22f9dfc65c7d52d6a7acf5dcd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:53:39Z), 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/TCAFE2060269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7baaea75b6ac6dfc2416f3e9593a83b60009b609033f9c35836a530aad2d0f. 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/TCAFE2060273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86557dc3face1ee48f10d1996dd2c6b3fc3d130ecd3528b9a880026d9c83bb6. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/TCAFE2060311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51fb4f9b3b769a63e7ecc10b0a5f77f1f53fe15e88b4bd19bd2f630c89b563a. 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/TCAFE2060321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41e4b84f8d546efcc4f58bbf21b354509b6199c016ba70be06776f0476bb628. 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/TCAFE2060325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585773856d30c01580680ea2bb9437358458e842afda83378ce14baa1fe71e70. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:37:31Z), 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/TCAFE2060329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9754ccee6b306632da47f2de8d6ffc1571d2d28bc32017db783607821859e1f0. 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/TCAFE2060333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb3530bde524f6366308aac274e8669b300b44c7df458f944a51ec742aca412. 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/QZGXC2200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33ad3c794f32b18ddc1ba7a2bdda581448e01e964ffb73f19f068fd6933c353. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZGXC2100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52e170abb28350cf9475471469c51b76aed7c4b23798035fa32c2f697e830e2. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:46:21Z), 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/QZGXC2300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb685849953d4b088700f7957a6f9e7a8f76a1d2ec37d11be9879f5cd8a0681d. 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/QZGXC2300910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946692cd6fccb233e8ea32833f6d424dbedb33843087230790256b6994f25db2. 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/QZGXC2301145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8b04249f967a16fae4278edcc792548ec31e85b05a91eefff9abc2f0d1f885. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:47:29Z), 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/QZGXC2400469.