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 0x63e88243bdfa0c4523c1045a42189cb12f0ecb8ac0591fd1c4ac6996faa6c28c. 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/6ad7a6a1-cd49-42ce-b4ba-bcc729d1b563.json and https://artists.proofprofile.net/proofs/artist/6ad7a6a1-cd49-42ce-b4ba-bcc729d1b563.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 0x522ab1db8960aa24479e9dc1b5b67f643066690b6fc61e5e92ed34e696031fcc. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZHN81921426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24cd28154bee5fd787fe177221b325c4188b93cbbcc0103e1c614bf8eb7ecd5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6N1941101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15850bcc77e5b3376b3f5aa24c3b1cd6123924885a2bf461599fa64ee74c2a9d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ72001341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77e548c953b6737e4c6a2963f5ecc743e24f056c744f9f22a37f61c14352ccc. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/UKY5J2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6e6cb3ecd25b9299d3d4b603168db4399ab700b207c9a958cf6478d5beadb9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKY5J2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb07d2f9c358f6253e61e650b10356ac3060e371db4fc0b54c83f84e608b35. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:32:56Z), 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/UKY5J2000061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe6642e36460b36d30545fe3f3b3fff46546a3996a67373e5dd17bff6f86425. 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/QZHN92367054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004c47ae6a40ef2cb02ca2ccab90112b220b43919b25d5434e35cae20c328e7e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZES92453910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afbdc681b2bf0f75e16ea8bfb34e303fca3d34b4346897d5b5c1bd92e15df3a. 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/QZHN82422663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ab863f42f6e32e91966c3bd7f8a55ac691530c711585b6af5d79b02e0a58cd. 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/QZHN82422665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a67129fe58e1c2246ead23ddd0975788bf6b869bae70c092acec85c0a841ed. 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/QZWFE2390029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92823b7d7f52edc5441b94389f9989fce2be430180d95b039dcffcad3c96b2fa. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZK6P2414833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe165f70ad066ad506c6db429877949611110edad17f52730e307f5a23fc170e. 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/QZJ842401196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ae0f677242cf30b59a8535f9f50aad07647d8debcae9a71816c253f7aaa3db. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZJ842401673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9cb6e462041171a0b587abff1a937d31179b637f7f57a3ce99ef8bf7cea44f. 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/QZJ842402191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e47cac7db054beb8088dacb6ed04643777cc440edf4cd68201bd4d7702ea3e. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QZJ842402963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9921c9607bbc1ac0bda3a77f1a368b590284f5db497e6d4d29467ea1523037e7. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZJ842402988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc30bb4720ae4051f4ae5a8d3eaa181e52a49c1bfa32a30f81f963264e223a64. 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/QZJ842404693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da8d4653364cafe02be717bbe7502886dfad629e505d0ae04501245404e7336. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:23Z), 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/QZJ842404391.