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 0xcd3278d446a55ba355999b86054ba06170d06934be07998d441ef6ff105bd79f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/49c4f314-98b7-45b2-8d88-e06ad54251b2.json and https://artists.proofprofile.net/proofs/artist/49c4f314-98b7-45b2-8d88-e06ad54251b2.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 0x7c3be6621a2683724f4ac56caf63d067ce50943426b7c0101c0b3bbc2ba3ba18. 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/FR9W12346341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0f11823b1cfe23978a822fde8edd715b8d32caa4a2b6af71d40df59a587ae7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:58:09Z), 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/FR9W12329625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be8e866d9e795a02af595059a4c5465efa475a5c5a4f130e2c8594d2032cda1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:47:54Z), 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/FR9W12252786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db469668efda52ec50d21d4393c4dcd88c8e2366a17b4db6afe90481973332c. 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/FR9W12314758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bb4ebedc866ad55f0a91587d3a68960a2f2cae05a37f75a76dccc7bf785e7d. 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/FR9W12346342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc20dcad09b0efff0ce7194503ab0db31d34cb525414aca2daf1448e7bc7391. 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/FR9W12346343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5cbd79a08ee32828e70acb32d5e90ee908d7d88221b41082c1e24355c09ee3. 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/FR9W12346344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e70b4f30719f50e062902ea25f84a640a3b1b5af044cfc7754ab41655cdde6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR9W12346345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3596b8eb7c00cd6d3359971ad1e325719c74b82b5cb61f3bfb3f6c3010b863de. 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/FR9W12346346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4f2063f380dbb688d307263b120cb762fbd25c652e9f34e84c5c9ec41948c0. 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/FR9W12342900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297fa18bf00b6a391f6bf121e7f1ad098708020aec595a2e76d2a68a3d4cfae5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12346347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754f6a6a8050350aecda8bf6f358d8745bc2fd812ef69c04c4b3d59440d1e69. 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/FR9W12346348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0f11823b1cfe23978a822fde8edd715b8d32caa4a2b6af71d40df59a587ae7. 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/FR9W12329625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db469668efda52ec50d21d4393c4dcd88c8e2366a17b4db6afe90481973332c. 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/FR9W12314758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be8e866d9e795a02af595059a4c5465efa475a5c5a4f130e2c8594d2032cda1. 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/FR9W12252786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c4edf78f92106e4d5e38c5c4977b36d582b9d1124a14ec34bac6225a9f45af. 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/FRPZ92100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8e4583aa2880f0fbe1de0a77fc66fff09229656cf0fe8b8a1653b64cf9e655. 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/FRPZ92100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a7e2977fc6444b29922a8b37f64ca7aa0d1d6e49d0333f492a5eaed5acc28. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRDKW2105923.