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 0xa57f2712e61873e0b2f7858fbaf7b08d27e08ada27952b15ba081d0b324b8efe. 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/d9901eac-c701-4675-9caa-b6cc03e12824.json and https://artists.proofprofile.net/proofs/artist/d9901eac-c701-4675-9caa-b6cc03e12824.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 0x151b45955f26dcddbae52a263b73764f5a9ad82624b665dc77a9779e652e7537. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZQ791800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9f4666930d60f59cf9f787d9b3d56b083d156d07ccf83c0f039cd8d891312d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZQ791800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647935f3b701ab99403416a34e60bbde6d7f832c4bca0eb807fbe3b269d9c049. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZQ791800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4987de8aec8724bfeb16f747317f865919acf0d2b642894281952a31f70e566d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZQ791800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fe1eb87612978c19eedac217faca65b831e280c4572b992619ba7cbe225fe6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CZQ791800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5e82c439465879e7e251ce6028237b2d6967f8aab1fd26e86d30afcd55153c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/CZQ791800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff08cf70302e54ed7e86c2c00b31405f2975642bf1ca4c6668254b592742765. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZQ791800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d81f912fde5e0b99880cf45bfda478138c79e018b3e79b513a12650521dec. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CZQ791800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c939b43121a9cf71bbf8541e6cd3a51968aac4f39244cfe7b00c85a28dc208. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZQ791800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4485ba56d0437580e130fc843cd852b743bea49b6c96d78ad413ca1478c91c9e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:27:33Z), 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/CZQ791800007.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632eb7265448c10949f8eeb9d47c3e3736ca8e2d19faacdcf931377f77e52825. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:06Z), 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/CZQ791800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0812edc4fce60968ed514f31031413caaed866b53055c511b5bc9a93f891d72. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CZQ791800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645079ae42e9476e5af7d6ac23a6258cbbf070cd426b3035ae4a3a880db8318a. 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/CZBY92200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52a8e7fed82c0371287b11feb5829075a85ebcce5a21828cfefa252a4c964c1. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CZBY92200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178a9c95883652453e6c70320aacc6f985b73bc65dfc8c8d8a9bfd5790566f37. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CZBY92200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5a470a3111c475f650274d73d8ddb29b3c595ddee8f6208217ee6dc54312d9. 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/CZBY92200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8de9215b02f1af2cf8e98bc68d08afb9e20761e7f2d6e82ee09c3de0691d25. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:21:53Z), 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/CZBY92200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251db5283c3138dce5caf776894bf42c3000ea1f4ccd45554e9ff509956dde0e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CZCZ42400052.