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 0xeeb823603efcf5e81f54185769b83137946efdb768c097ce4edaec25d065e8b0. Chain 2 (Bitcoin): anchored in block 953886 (2026-06-16T04:37:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ca6e5ac-272b-4aca-bd6c-cef34c75c03f.json and https://artists.proofprofile.net/proofs/artist/0ca6e5ac-272b-4aca-bd6c-cef34c75c03f.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 0xa5fed5d362e810aab13f0094bf9f761dccfbb2f61de1e0eec4a4f82b706b6479. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBC2504215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65105f150ca49009aadb558f5486e8ac59aded3e37e0e53e6ff67c6286a36649. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTBC2504216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec72c8938e87268138f12030833c7d55127a5f04fe4efddb1b41572e9ae2832. 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/QZTBC2504217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcedb46a44098fdd9b2a03922df619e363928ae69ca0ab7b81f27c2acf1da8a0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTBC2504218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2fb9200d6ebd5839e34014fd5460570d26235492737b23658257d29730134. 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/QZTBC2504219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c24f90fbe507af442cc5635b7f017fd1f5d2b4b2ee728b0bf2b3b69da090ae8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBC2504220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3338e8f167c72e0010f9fffd56454d9dc02ffddfaff3fce9722f7e001e85de26. 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/QZTB62556657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65be9bb8ffb160a770f2c59b53fd77cdf0d8a035c044e8f19ad628ceee304531. 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/QZTBC2504221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0ca4c7972d973f1a452c79e2822148fe8a3300a220d9f624c875a8cb502183. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZTBC2504222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a714994706a81be2be0979a9ed969e3d6cff807d1753d6b93172fdb9e8d8ee. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTBC2504223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1289578ad20a35aea253f93343fd3de99947778d68b9d8c723f38a4f6b4512. 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/QZTBC2504224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e3038570d35b928da8fba38693a4e125c487ffc74166c4c923537f50a4c4df. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTBC2504225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebc5f8a053ef7a79055d527485382e4a30b5f1298f690000f62739ea0e2eac1. 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/QZTAW2575731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f9dfcb3c617444dec93cceda2078d4cfe3665fefeb7f8321bcd2f90cb3bd0b. 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/QZTBC2504226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16dd4ae1f84b8ee29ec84cd9616a44786d5852cdc7833794385e2f1bf4ba56b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:41Z), 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/QZTBC2504227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d785a0b7e76a90d4e27c70f3cc0bd3608c9d4a1b3c55ee93778eec71fea2ae0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:38Z), 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/QZTBC2504228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341b323f1edd035476b60bb7e8582ce83159b4065292df1b3c8bdcde248f1777. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTBC2504229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb62209bbe2a82527a46acf5c5d78f83f1f0ec189d92ef05aa8d1591e5539eb. 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/QZTBC2504230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b5d6a0089cc260115427f14f8e1e940e2ec7d5a25796e999ba69afc49d238. 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/QZTBC2504231.