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 0x57a42cb58dbaae42ebabe2c8ca06ae4a99a911df69d0394b842c2f8b4408f989. 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/5c30aa87-85bb-4514-ab9d-8f129191c744.json and https://artists.proofprofile.net/proofs/artist/5c30aa87-85bb-4514-ab9d-8f129191c744.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 0xb31200c5c27448f8bf73193e929ddb184dc5117414f64b0c4625e79db5ab9ea1. 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/UKEX31917471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab95c10a243f5f9a493c5ccb14aa139e443d03fd13d1201d67a0d43e06ba6847. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/UKEX31917472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe867010cf927f4050197abbac35e3c952a9260b606799bbb633bbda5cf6629ca. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/UKEX31917475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1256e99f462968c2bf8417ca28f7ca6867f99160c3fc8ae3c77e5ccfe4e8feec. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/UKEX31917494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d337e16f2ee5b32b064abd663526cbc841532026eadd2332e5fe6eed56a54c9. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/UKEX31917497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0d4475d888fae3b29f7cd15e5862f82d133926f3f6ddcdcf7cb3e93ee89e79. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/UKEX31917498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f581b625fa85b5512346ccb9724cf484a8c48bc3184b4eac240f9dd10e72c1. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/UKEX31917501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e21703a593c4fa69c889b69dfe1b5a6b88ee82c8e20208e467f6452200d1f2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/UKEX31917502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7632096f527fe9c47d96ed839d83bc889e0fa914c3695f3ab383dcaf58f407. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/UKEX32020258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f043b0b2598e3783742c85d48351e6a2b9eb82a25c8a0b922ffb17eb8669f6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKEX32020259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd3354dd616653bbc84d0f7ce3b4dd0d45cfd0cdf0d7472c991ee44b6b1829. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/UKEX32020261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76ac2edd82a226db09627d4d3078b1f35e9297c126f9a95c5d9840be2d1333f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKEX32020263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b3b08184ac716eb862fc94c765278a4e747fbec2c13aec5db772533e8ad249. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UKEX32020264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5008dd956a6d24b42c9e2adf56031447bf2fef8ab04b4c48193e320c758f8c. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKEX32020265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cdb56c3e7cfb33534bd31aeb7312cb795de1b49ba2142c59499e32f2dfd204. 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/RUA1D2208008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728f01b9ad686277f9a42f9fd27d883b7a6bb0842a681e4c8a59c7d4c45fbbda. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/RUA1D2208009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ac157cbac84c9efc20c278be51bdb56818b3f886ae4086657b7812ff8d1ce4. 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/RUA1D2208010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0defba7fa4c03172a17153477b9fe56a76046b68639aea5ed99e612c1af9fe34. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKEX32329168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0d5c142b274dbe463bdbfb8b71676b7713195579d466236c00d23390298417. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUA1D2390762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9067c2f078f6f5ebb68a76f60f039afe521b9eab346e8503ec65d15ac06ce1. 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/RUAGT2306990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7b8793c10e5534ed365afc0d084f2088679014569741cb64b8e46a1df39787. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRX762441437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b033df060d5b3563b42e3120f90f376a99f4d2f3678c4fdd20d9fdf4b7fcf6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUAH62412099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091a678e16f57df76fd85ad8b374508ed97df422e8614e92ed588754bd78a28e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/RUAH62424259.