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 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 0xea88f1eb19083fe42837571d132f4daf4e6ca6411a30a2f119e397abe5e3f8d7. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9138b733-f32e-468f-84dc-c8f5867d5f19.json and https://artists.proofprofile.net/proofs/artist/9138b733-f32e-468f-84dc-c8f5867d5f19.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 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 0xa600f7a156989134c9ca4e4b12d7a6ba927fc0839ab8abc5a41edfcfb38787f4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB42558875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c047b9fa39d2a48969133b40034d61e1811319854058ca125e93c975d95362. 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/QZTB42558876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b7bd83b08a7af094f28ecd51355121262a1dfc520e4f239e64a467f9df5c7. 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/QZTB42558877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411dd2cbd48c2d4de75117d8eeadd781483534fa97568ef6799ee04b1593e56d. 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/QZTB42558878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dc742bb486fdf51263ca4073437785661ce551f8e1fb150fa663246a449613. 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/QZTB42558879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51bd36f37ee0ec4c5bd3e38c45ea33e4b11134b959abe5ed7fafbbb37e789cc. 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/QZTB42558880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597eb1caaed375e752f0908c44e34addffcccc2a221944be767a556749c51460. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTB42558881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c21913141a146891d6bcad39c43b8ea5f453fe394b722ad5e32838362981a82. 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/QZTB42558882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59c53feafa2c7c2d4b1e7fe508cd20739fa4322e9d69043517076332cd90071. 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/QZTB42558883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57213b544c59bf3978dde9b9d0983945ace36b062902bbcd2fa67ff5e7f4be20. 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/QZTB42558884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8000083febf88fb38781898e4ad4fdd33b3d85b5a8a1f0a757bdbbe683a8368d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTB42558885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77740d5a3a0077b4ad4e63235410108f406da22c0655ff12d6c665f073f6e140. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/QZTB42558886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e9d11db44e1f1deb7fa415cfde8ef37eac23310b65df4964197a8c7950815a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZTB42558887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d7fb0bd55243c344ae9aa6ff912945a34c4e7d04d0b2b0d1100e76b72f5876. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTB42558888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe594bc0867b9ec4bfb74580d4463ac8e8b2187437eafb6c63a8a49330abecfcb. 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/QZTB42558889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cea4adaea281993cf235c674167233f37cd753bef946d6bc9069f87e28b64a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTB42562490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ec0817dbf33082eadbb55f3174b4631038d772a2f532298b0feb488aee6536. 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/QZTB52569089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b2e5a6024657048752230d7f6af8c1af5d87fecc59ef7c61e0fd64a0863b57. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ772536859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3a1424d46c997bcc74f8375140044aaf6c4d3d180f2b39708b311f6637e0e. 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/QT3F22501564.