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 0x39abe9bf8a3dd82a5ce30c959bed6aa8a985df0688cb48267b4e6e0357dc5051. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98d8a5c5-0529-4f1e-99ae-be8ca0a1ff03.json and https://artists.proofprofile.net/proofs/artist/98d8a5c5-0529-4f1e-99ae-be8ca0a1ff03.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 0x3a8de11918e523cb635edb1e77feb1b6fcccc9a8436ad18b139a75bc15f0aa90. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITL771301624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cab69896e1dbafc347d7529e26713ad0029e84b3e28187054ceedcc269061c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH901200672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb605691a19df57a6dd5b63e503a1b1b0627263311445075a1b05b67389318e2a. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/ITI731700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53ca083a98b7deab4e1b2163e65bc8151d931b906bce5306508428515b1fe4f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITI731700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7982ba0eb39d8cb1226fe9a89fcdd86d598d9fbf6761e7c0cc3a96cfd786141. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITI731700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fbd095a20da074a04a99441cf4cfe06657aaa8b6fd3bc2f04a14a432857ff2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ITI731700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1365c7d9bc2612b20d710c417b9844322509f8d8093b38592c6ba6f268c23a5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ITI731700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ef7f09e4a9539c1eb32e1c6b928589d2f14812922fb6eaabd0966b970dabad. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITI731700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2628204dcb32e307e65aa7a70efd4d9a6c50910a1466bdf7c0569bf01d8f2662. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITI731700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095b9b761edec94335b3a638647a964a9ce434a6ebb585ac35449e3b08dfefe0. 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/ITI731700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68410a19993db73f052593ff7de10182dd74bc5ade77b7a4ba707ac1b37b0972. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITI731700115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc5ba2277859f528216166cb7f4888d7ec32f052cc19aa0b2c4acd0d185ba82. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/IT6DT1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fc28c3f66ff52d171250c2f948391b626c3afbcb8d20f16090ddfb9dc22717. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/IT6DT1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9ce9d14a1f5e440f6a177d8fc57f0940684381cca7a60e947bf57c682f8676. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IT6DT1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e04d8f012905234e152ccd6ddefd2d45e9eae37eb8e998407e28fc87f5a9f1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/IT6DT1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588eeb43e898dfa450f9f6fb37e59c5e3aee0913b4d0afe28fce9431b55a24ae. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/IT6DT1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d55b0cfc2ad533e190ad610f5aae1372d4f3136d381b2597e5d18eea1d2a88. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR6V82705795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41df620f0608e6017030b7304c28ff1bc121e32c8641706c3a2e3049e7aef7d4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR6V82705796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0422a538088b055668388c71e641af430f5f64d14594e51898c1efe04ed6e0a5. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR6V82705798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7448240915dc653c37c7d612b9d40f9e743582f22f9c50868a79ed6bbcab3c6d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR6V82705802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a14c13bae6c0c3d910191c676489fcd1886a475b3707ca6ad2031e35b4dd34. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR6V82705803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcd1e93f825f0b9a7fb9647b16d03502d1873f41cea51cc95dcef4c103b69c2. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FR6V82705818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6c034498f6ced9c3d2026ae8c07a21867b0dd2e396b28350137da6b1f93190. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR6V82705822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a046153fccf8be8e81fbfc5bc1e297f8618afe239d42b2604e5719201405898. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR9W11514037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbccadf5d129948b91999af13eafafe452eab3cd3f13610808fbea0e8567b5d. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ITU932300127.