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 0xbbc7ee8cb0fc070ddc1fea7f594e56b1e091c3ac9651c3ffe60ba1ac84cbfe68. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cfe12a4-12f6-4c09-9835-af611c97c9c6.json and https://artists.proofprofile.net/proofs/artist/2cfe12a4-12f6-4c09-9835-af611c97c9c6.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 0xdcc86997f3a4d163617c1ab02fb9346b7448f45b2a6fa55f0e6d9ad87793ad96. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZGLS2512223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38abc39e63ee544ff4edb8847cffc584fddaefc2c829a02582682ed4ebea64d5. 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/QZGLS2512241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9e128b89808ad4a811f312cb8aabc2f0e177c4a55f277573f68772622c9897. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZGLS2509674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408a5ad4d5482589f4de4495d63684a9e1dabeecf683f837e24c9e149bc3e684. 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/QZGLS2512247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af9d7df1c9e5b6394171b4a6480b832155821ca7ca68e9081882d37bb77a4df. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:43:43Z), 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/QZGLS2512268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6100fdc7d6b35d7954f4434e7e822d2af766a4d59a928c3bbc8c99e47f9c755b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:15:32Z), 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/QZGLS2512242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adc5cf6ccb50dc8c832436b0d01dd56c372e87766a7ddd6cfad58c827b0592e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:29Z), 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/QZGLS2512246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc83299e5f1a385c803beb977841f5794ff0bff11e7870ba89d21b842980f56. 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/QZGLS2512267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85ad906541509e8d23cacdf6909af77da7e0b41a23d0373314842223f89590d. 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/QZGLS2512226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404cb2c8136ce774c1bb62f3c31d79099fe860520c476693a08629b28c404680. 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/QZGLS2512244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec4de3bf3be1386f98b240c3d70e6747c9368f874278f160eec6dfa69c6aaf7. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:32Z), 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/QZGLS2514281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa945c9aab5a8e2ef8318e46d11986ed651a49eaf00e8341770e6910ca2c1f66d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZGLS2512272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600b8e61a50146f60cdc8edd59d42534d6a63d3ba6f0fad168c61e5ebe15db45. 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/QZGLS2512221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db8f1e2a50fa7024631a5e6e1980d889ebb37ec2c5fc6434266ae5a74bdf3fb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:50:45Z), 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/QZGLS2509902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e665df3ccb281968a87876256a36c4324c3b17ae678a4a02abe6a2bda394e4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:34:01Z), 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/QZGLS2514286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5043e44ce9ac0c926834221f7635d0f7ec0c697b16f3d7df5128dd619a813af0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLS2512218.