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 0x5126b248ec1312a8aac23939fa3b99610f981cfbb0ba2c5ec46551d15b5bf70c. 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/ae027136-4ff2-4476-bfcb-b5847c9216ca.json and https://artists.proofprofile.net/proofs/artist/ae027136-4ff2-4476-bfcb-b5847c9216ca.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 0x18932792aecaf9afabd70b3f54c8bf3758072e951fbf1e59bdff0ae63d5e5134. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:05Z), 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/TCAGG2274980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab39e37a1232c401d3a80a2783721b2527485edb10d869bfc675c5f28536f61. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAGG2274992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e16acd440758db31537d97ca9dc00dbc9f7d525d91c2a9a558280a398f46c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:25:35Z), 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/TCAGG2275000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdad0a56525a7d473c2d19c7a09feb532cf43700226c13bd4ce7b862711ab383. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAGG2275006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c4c7e88ec33d74cda01dc7faf7c5821882b2ec5f0381c727b73d02554cfc02. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGG2275018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57eb756b947d1f12e0674635a9fc65fbc47d0526d4c8ffd5f96b3c9fd2c1f6f. 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/TCAGG2275027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5afc9a78ae45708eba6939f8f06a87b44c4c9ea07c14b08ab0384b6d3ba697. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:16Z), 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/TCAGG2270750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a654447e6287fd4482ffd2c2e9ad5545f5abfa6136b61382855fa28ada067d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:03:13Z), 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/TCAGG2270768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2319de38eab52d3b91f64a8a32d105416fd3d1d8895cd9e72700be59dc8c28. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGG2270801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8273670809a1694db551bcc100ebef8416b775cf73eb2512d6d11e87ccee9d59. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:34Z), 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/TCAGG2270806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554cbe62f55a2367ee7aa774bd5ed4fd985913183f71062fd2d43bafbf033178. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAGG2270830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce10922aebce7fe1c0602f90c4b246a1b2456cfc8ba5a45c92b79f9756161e8f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAHU2410281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5936bd0830a21a0c211bdb6c9e9b8f4febae17636c733fa80fa9d4ab00dc873. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:02:21Z), 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/TCAHW2429655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729362a4663c10cac9255c6e5ea98ddb2e2b5843f655ce74db55212828af5dd4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAHX2414367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6582050c0d80c8bfd01de69e737c1758043b89716e1c494f594e34d3705c8f. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAHY2494253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bae1e4f6314bd8143c1d883e8a63849eb2f9a128e6a73bfebb377ef56107cb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIF2468028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb99345a59ae936f48696c0360d7774c85ac06b6d517b9283bc1c51a896c9a4. 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/TCAIU2448835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b7ff4abe2231fa6e511fb8f576bc11692a9783f21d7d06e54b02290746d414. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:16:02Z), 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/TCAJT2588693.