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 0x8179cd44d54caae9c755f1c6517abb7acd1c90cf4ca72ea9892121581b805504. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7104320-5468-4ada-a7ce-23f743659ec0.json and https://artists.proofprofile.net/proofs/artist/a7104320-5468-4ada-a7ce-23f743659ec0.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 0x4bb481c781ce9327e419c7b306060ac1f78e2ceff13317b2d84758f32673163b. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZK6J2039928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b050366eb91629833034c4d0acdd688483181b92db6a37d69aafe502b98b9b2. 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/QZHNA2198786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1087ce49b6d1b17499b8bcb5ea2bd1164c0fa44fba60e2ba501c45be9add36. 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/QZNWV2143018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1050efbf3d25891a1b7468e5219e04885cd5ccaa9599c8ad06bfe4e78d38d. 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/QZHN42277350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf773150286dc127568dd7ecd41248b3910f9df8dcb87ca7c823d92d50e3ae158. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZRP42242407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b5b958f86dd8f9e36d757cfbefbce1e798fa7536a335facc37f4db12b5c6a1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZRP42242408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e4fc740f00f20b372eadbad5662a27ad22abc8a30b04449123c72191587096. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZRP42242409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb38e49aca1d5f6fe13679a43b58e85724f73a5a4feac69edfee104f16bbb7f. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/QZES92363093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3a7fe1c109cad795011b17885ce7cec0a39b1a3aca8c939208c8c30ce1001b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:24:03Z), 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/QZES92363094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5c66a3d7ffa047f7b77cf130da59a510c85c289cbf18d11fd2a10f4aa53f2d. 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/QZES92363096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c83cbb2078ef8563692410ac194830c404cfc1f1162909fba40b9172336ffe0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTB62467171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37875c6c99105bee45b2c92d955873d0a27e841396677aa20a6e39eeef84f3e2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEN2095923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff273bab90a9896bcb5e6709656c52f40ed7c2efa2568025942e8ea114833af. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHNC2559821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2526c285cf173698fca5c239835bc3ab6db337b87fe526f092af6252c3cdd21. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZHNC2559822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab35a39e8c524a48a7d4bcfc0bf02509fb27ec34242f6eebd593e7078d6b1ea1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:16:35Z), 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/QZHNC2559823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe347dc5dcdff7aff1e332fd06fe4b0470395374a0b4769dc4cb20eedd0c224e3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:06Z), 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/QZHNC2559825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24e886aa42842b20d41e1d9dbd7105c6f1cf4e986b4f9e5cb4ef53b22c69d80. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZHNC2559826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0d33dcd551aeb7808ec5b4265b9a65bf044f5002fbec99b81fd83944bdc18. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAY2535479.