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 0xfd8ae42dc11f0c8359f3cbee23a7ed4894b28407931e503081b319790a84eacb. 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/88372d02-e7ad-4c3c-86dc-4fc3e74c1bf9.json and https://artists.proofprofile.net/proofs/artist/88372d02-e7ad-4c3c-86dc-4fc3e74c1bf9.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 0xf2bb3af353016c1b3a6f8d5f720baeea4f95355b884d891c8b7b96858439d812. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GBKQU1547674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6178a150a741c3c30b45e4832428348af5ee9727a2c0bf17dde75f2b8635d80a. 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/GBKQU1610142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677ae500c464cf6d5420c55469eef4597de40e79962ac65523803aeb5b1395e8. 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/GBKQU1610144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3137b09acb9fd5797cdecf61328c7fda27c76e21837bd9fc48275e93133dca81. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBKQU1645735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4c42a30cfeefe0f0f0bc8a76661ad73497b43e8552d5ec09aefeacfa87fe31. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLF711803619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c74de8dcd278eae161de44277cb545d854e9559d109e6cd6bba4d034f893029. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/BEIW12000523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1349ce1f6f3e820dd0f27cc3ed61d6ec00c8917403bec47badf3d0ae5db2a1d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2201350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6400e7197f0762862031aeb5a44e70bc0bdde133f7adcfaa80d6e593101d81e. 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/BEIW12300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4696393ba3f22aec19b81e186339c71fd85dbaa339479fc77ed82bb919e53d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DKAZA2100333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458868c79f91bb92c1aea1249472a3bf9fd0f7a75c89d6e98edb2ee7cccbaed1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLQ8D2300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b549521cee4461557b413572428aaa76bc5e3fb2048586c291ac9faf1a6c26c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKR6V2192638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa89077587daaa65fbf8c0a42b873e0872f0a5b419a6e6fb9b679bfc982a0a82. 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/NL8RL2330244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2908140dbd9f6ad77f069e6406e0f59a5e45df09f60790e0ab8860fd2e64b49b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEY921907215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c74de8dcd278eae161de44277cb545d854e9559d109e6cd6bba4d034f893029. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BEIW12000523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01393b428a35d99e4864750818a72e9705a3daa8ec4168fb30adb96d65225f6. 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/DEKC41500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacdf1ed53d5f16997d31ba0085e74c2d04db2fde99bdbec21fa79c52164597f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEGA22103451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6400e7197f0762862031aeb5a44e70bc0bdde133f7adcfaa80d6e593101d81e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BEIW12300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef68b17bc8a058ea91b1487935e8f1a1780f8081c64391170663925301d322e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BEIW12300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2908140dbd9f6ad77f069e6406e0f59a5e45df09f60790e0ab8860fd2e64b49b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BEY921907215.