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 0x9d8b059696d829e08b9806d74b05dcad46f09566e621b24411f86b23b7648e80. 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/dc912da6-020d-4b4d-b851-c51ab444ad27.json and https://artists.proofprofile.net/proofs/artist/dc912da6-020d-4b4d-b851-c51ab444ad27.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 0x6d5b127e3e96ccab0c934eea0f09dcd10141d867c9ebdd473a5265686af0d58f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6L2157022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1033bf1023475fceeea96fe4e833f762eba70bf7eed038f3d14835e48916c3cc. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:50Z), 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/TCAGP2212709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e6b254a4dbaebece88be59ed3b3fad1e327238dafe68224f787a693058c90. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEZC62418085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7ea6eb6dc234aa2b6fb32e1034b9024cafdf8c16013fdfa6ab17129d5c2914. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62435853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa020b7120d2b9c8b987912ce972eecedc174564c85885b3ba8910c6488bd0071. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEZC62437962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e6e573e151a9ec99891d0cb23af4cfc4d48b66221b05c2670aecc273816857. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEZC62441132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f2f5352f2a8208f4dcb9d3cf2822eed066923dd190f8ccf55990005d0ca41. 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/DEZC62444312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca6a418fcc1c02ec6bd468c3fe73dc3fbf28c44f0c78206993bdb2818d49c80. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEZC62415102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e6b254a4dbaebece88be59ed3b3fad1e327238dafe68224f787a693058c90. 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/DEZC62418085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e6e573e151a9ec99891d0cb23af4cfc4d48b66221b05c2670aecc273816857. 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/DEZC62441132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f2f5352f2a8208f4dcb9d3cf2822eed066923dd190f8ccf55990005d0ca41. 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/DEZC62444312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa020b7120d2b9c8b987912ce972eecedc174564c85885b3ba8910c6488bd0071. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/DEZC62437962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc7a8bbcb3f39c18d71b7fb34c884d043d844e880311fc1acc02d86752277a1. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEZC62431530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3e99ead82b151786ad87603f88888537ba729387f72269cba9c3c5594764e0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DECE72500414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70a96f47170b5739a5408c5726484b4845b54c23fad33dec30cab6215b9ceb8. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/DECE72500418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a5bda6192d978f49b0da4692c19fe589ab10aa82504bd8b841e95bd64126bf. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DECE72500412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34f620406079300e9cbbf775be94e2e76b1db469a3bc36584809a29ddfab3c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEZC62519005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f01500a5a214e7a0aa9a2f9f66bbe09ebd899d8ceb188ce782a2d5eed649da9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEZC62510082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ba0fa8fdcbf20a4403e449777f420f2528e5f1d472ba7aa313be3534e7cbc5. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/DEZC62594164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862f0dd163696a12edb4cc83c4655db0bc4fe0fdeb50fe2cb5f30837b58f4cc3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:10Z), 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/DEZC62514883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff47aa34ae83bd95ac28661d461b8a7888b01d1b1351c665faeb699f559854d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:06:56Z), 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/DEZC62515692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f1d65324e1983cf3212de2071988e31b68cf9210e41f79e20aaab004d0218d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEZC62513436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d191ed1b5334594400d85cfa384059a1acaaf43b6cc7e256e756648be62cc23. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/DEZC62517152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c34f620406079300e9cbbf775be94e2e76b1db469a3bc36584809a29ddfab3c. 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/DEZC62519005.