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 0x6a85120f2a78b2740dd031315b4433f9a22dafe6e37de46f3fcae847f0c094df. 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/a46a54b5-a00f-40fc-8f4a-27cd65ad5609.json and https://artists.proofprofile.net/proofs/artist/a46a54b5-a00f-40fc-8f4a-27cd65ad5609.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 0x08f2af8753e5259219f2640580691f3c9ec3c3fa86c3b3319ba24b969983bab9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR10S1858178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b30ca5037dfcd0c2f258acc514ec8352fd06cf808fc274cdb63fa4ee048d29d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IL7192000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5de0912a25acf3092566635d4fb271f9c40c2fd7a780ca59fd1868332af241. 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/FRX282136682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c3dd087305738256e28b4598a05745092c16c001209e059c74ebfa4ecbaa29. 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/IL7192100603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27af3cb237cff32bae1372aa399d03d3835e29233a7d76b4d90bda46abcf9468. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/IL7192100671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b67a57312f0913b66cd026920391f7864e3a26f53c6e05a0a987404c26b6108. 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/IL7192200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2700eaba1288b45a76deeb5382bc53bb2a247f613f3e292ad381291b923c687. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/FR96X1689255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca20983da506d6900007111f12161fdbda9dcbb799a85e9ee82d4154cad7158. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/IL7192200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ccf6a2bf55fc6c60c75767b209ada507b37495d4784ddf69200b85c3f135ef. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/IL7192200519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed3e94b0c1cd37f37e799235304f93e4a4f5fad6b638640bcc91d6de944417. 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/IL7192300778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47a0a10fc4060298e7e30f761b295ad0b27e67e0c729a6f3c37b7846029b9bd. 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/IL7192302017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad17a29e3d87e8d5da50c01a7ae174967a78de8b5794d1101144640bb4c474bf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/IL7192401490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ccf6a2bf55fc6c60c75767b209ada507b37495d4784ddf69200b85c3f135ef. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/IL7192200519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2c917535dfc0bfc3b4d430ca1fa4e1917c593974c7a81fea5eed755cab7d7b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL7192401985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638a521545ae70c4f41ea8ec31fe9bdb2e545aaf1b0c1b8c0b28ada3f09f0234. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IL7192301265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4618a6005323b1b95ea5b7a5828350c8ed2ef6554941f03d83a6c2e5105fdf58. 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/IL7192401987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc12659c15b5e709df2215a50534fc4d1679042ee0c2caf8843115757e06be7d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/IL7192401988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad17a29e3d87e8d5da50c01a7ae174967a78de8b5794d1101144640bb4c474bf. 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/IL7192401490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca20983da506d6900007111f12161fdbda9dcbb799a85e9ee82d4154cad7158. 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/IL7192200237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc12659c15b5e709df2215a50534fc4d1679042ee0c2caf8843115757e06be7d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/IL7192401988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c9e2fdff0ba7992af5fd4b6e121214562982c3ffbca900e1f6d85cefa6bd9b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/IL7192402946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f781472073d7b66a1d7e11cacb7f439758383a18d48a12fce547064aa0923c. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/IL7192500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedccc20b0f4c871a5335daaeb3f1caaf7a449c2b415a0266750e3c44ac390e1a. 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/IL7192501551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319d5736b296a50472c75941da1377a36dcffdf566df8bcc7f1e35271f83fb72. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/IL7192200617.