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 0xc930c7e2997189fd1eac6e028ac61c9964a4eb7bba4808d7ec88f1f8747e6db3. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4d41d0f-e975-4efa-8617-2cf1beeaf4c7.json and https://artists.proofprofile.net/proofs/artist/d4d41d0f-e975-4efa-8617-2cf1beeaf4c7.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 0x85571673954e49c981c6b5761ad04d583ae951a4bee493b07149bfede01ee71a. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBBHF1310391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b2f8c49add84fdb9e65d9bb01ab37c07e831dd559c8c3f18dd49f39f75c1a6. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/GBBHF1310392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82595a1859f35406854b82e1bdca69ca0ba67a6438c354a61b479a09e2686bc9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBBHF1310393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd883df1dd2bdd858ca9d537f84e1c18e583406c4e3d12f5d6e7d063285ae9d0c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBBHF1310394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e7f46a4387ca1886a7956c7c5c4b852888bda365e3f83a59c21e5ac1586980. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBBHF1310396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb83bce287704b0c5efca6111d8457ff4bfd778433ffb6b38385e2df589409d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBBHF1310397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22336a984147f08b1509c24535f8dad6148ec4396b9409cadc50aaab7aa70641. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBBHF1310398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735a7a3b8c150a84b41e8a05c73db5aa06b298451e1bad2a78dd818655a7be7f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBBHF1310399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c24b7497125795b6b11952e70d39b0cba3ebf1317ea457dfae6fd15b103fd1. 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/GBBHF1310400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceebfc6361f44e9d393db305a10dd0737d87879f47aa0ebb537877725055793. 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/GBBHF1310401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7719239b9c18e505ae1efc4c8180f56004f10a3237ac9f1478e00a3ded7794f2. 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/GBBHF1310724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc5e8d161e691fc4010aef16b49e3253fee358013a7a9fbe82c4138c4bcc59d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/UKU932252724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a22d0cb63eaa2ba6c620825d67579cb499b15ffd5b14715278af1529aea936. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BEZ352200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf677802a77ac4fcecdd72951c6adda4480e07c4eab1a9d23c781e7583065e43c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BEZ352200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221a2e43b84be8eca1fa38f11dc9399adcecd1e7dfbf6c22c4399f853290691b. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BEZ352200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed5034663ea285f84da3482785dffd0167cb01b7457afea040f91c70822ffcf. 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/BEZ352200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4274f2ab4b6fa53fcab2aff1d38d15f9ebebe650c993b6e628f0cd8deac4e6. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GB3X91500040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a06ab88a9bffaeca99a1b1c0f4bfe195ff7aa8b5fe2728a5037615033e27c34. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GB3X91500041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70da946edd23f10273af136a971c6ba12af114e610b5891026f1abb061af6aca. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GB3X91500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e19dfd7af155c7af4774408574e27eef5b18254240930555e09dd8c08a1f0ff. 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/GB3X91500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5f7b220ab4e9ad442a80415b24879991540513a2ef37cf290d1821719d0e44. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GB3X91200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b7f9fe3ba6eb892ad16d0d190fcd137563bb7b2d00f4f41a44ef5c9d820361. 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/GB3X91100002.