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 0x3686c8f6c56dfae0b824e1a044ce7a62fa75c51fbe60bb2d5de8545db664a3f6. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1236c4d4-0eca-4cc4-9a55-5a87611b0757.json and https://artists.proofprofile.net/proofs/artist/1236c4d4-0eca-4cc4-9a55-5a87611b0757.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 0xfccf5e9fcc90404af44c503e107d7b4bd1bc1d97962b1b1d8f24f5fdb3471d99. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6DC1550685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe524c6b864798385e4d1c7bd5dcc8ab1bf31bba47d60374113bd0d42852e18db. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:26:46Z), 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/QM6DC1550690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9406ca91adce02f4b77c594719032fa53e95b34f7772740cdd1496d1db6950. 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/QM6DC1550698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2f5f021e85f76fab03254fe21ed85ca9fff951d4b44f4d4e020b6f4ae22da3. 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/QM6DC1668048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0678beb7b6d05c780456836e450720e536b5ea8b77beb754c91d7b7190ba35. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QM6DC1878944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c8d7cae188792c4042a64d67f7eb737d3d4cde6b752c949b47edc13bf4a7eb. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:35:58Z), 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/QM6DC1878947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0678beb7b6d05c780456836e450720e536b5ea8b77beb754c91d7b7190ba35. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:58Z), 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/QM6DC1878944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c8d7cae188792c4042a64d67f7eb737d3d4cde6b752c949b47edc13bf4a7eb. 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/QM6DC1878947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc9d82299ae98ea30192eb705565d1ea60a6727d42fd0ac898ca1fdcd814637. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM6DC1878809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01f635d583fea33493c31c2199c0aca0a83aadf663f1a7c7ab50a26d8efa4dd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM6DC1878814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cc2e1c911a9714984bc9ced465e8bbe728f8a7fc0d883bab2bba10f98e8ef2. 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/QM6DC1878815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cc2e1c911a9714984bc9ced465e8bbe728f8a7fc0d883bab2bba10f98e8ef2. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM6DC1878815.