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 0xf700362b07a82d8365b30ca249a2bda675d01a1bc34800a7a82f67155eb1ba39. 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/aaeb02b4-8667-4823-b1c9-3df68cd39365.json and https://artists.proofprofile.net/proofs/artist/aaeb02b4-8667-4823-b1c9-3df68cd39365.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 0x809fb093fb473d72c86b7d62efd5c834c309fc67892882abafab2987f351e693. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZMEP2101392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fcd2b63a51a8dc5b45a2761c25fd4ec017f8fe8e3dc0fc1782ac27d39d469e. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZNWV2131657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe11793d6eacf409c77b226eba8b81d79518a104980156cc43a1b1d44020026d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/HUUM72200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99980c197023d9840bc36bcbf8f08c93aedb02289919f327b4e332bc5989c6a. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/HUUM72200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0e33035cbcb094dd5b2af5b4eef3aa585d56532b1a9d582039367a5cd627b32. 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/HUUM72200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8850975552dfd4dad25735a7d79b07ed8a26a018d50c47b292913bee0bac03e. 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/QZDA42242724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac1e20eb972deebd40d383589db13a5278f2dc072d80ec1d79a84384cb8df2a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUAHC2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0838677e5cd2b82ad19e33ec3fc753562a206950f36a888b25bb0090ef0c393. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZMEM2393563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5c39ca0f14bfa285b6c69483af3608e9f996f70c922e622c5ac80b9afe5d09. 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/HUA612303221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5820d9a8fdb4c92fb609024e8d43710f9232ab4c079a7d023cc20b62662264f9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/HUA612303222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766dd9f336dc9db5204a8fffe292c14ec834e013fe8763a5811ee3089bd72a0f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/HUA612303223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5324cc8ca1e830b8ca86ff295970796d88cd95f20e85e1cb309ebea9dd2dd71b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/HUA612303225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40458f335cb4ab8a01205c1f04489c7f9a7a659fe5efc6f5e7214703cb6f100f. 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/HUA612401560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdd70ce78089bdcf5629a0a8bbf8f172fff274993843f39f8ff7e7a10bd2a3a. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/HUA612404063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad65d433b3b58c18e8a2ae7fbf9232548e97f72dab17427fac65eb780d65497. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HUA612405115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1337c448923d224d8f61c01b93d903d33f20a391d35741a616591e978d48aed. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/HUA612501471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8000180d9687b94b3d31a8830464cea5520f69d45714a7feac879373d1ee2491. 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/HUA612501258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1337c448923d224d8f61c01b93d903d33f20a391d35741a616591e978d48aed. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/HUA612501471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86014f56b7c11e9c607610edd698e82d8c08e9c87a7a9d97d778d087b64c1db. 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/HUA612501626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed4eaa2316abc927cdd3f9aa8deeefd4ee6f0919de9c2a02aadae98a0948fbf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/HUA612501628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf6e096265b123a3c6fb9b6cf754571c1a37d80acce844ba9b1d8163ff77acd. 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/HUA612501630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc984981571ff55cfe59b25bb7d96847c1d9c63c71f5d790f1cc0e7c09083a95c. 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/HUAHC2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84db4e679c4edaba2d4e74081394563a7758ebb2cfa2177bf87b208049120dde. 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/FRX872424488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826af365ed0dcbde599427b303ea5efe8d89854cc044b142eb80ef554f07eee8. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/FRX872424489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58253bd1e4155b28ea440fd36904bc6edfd602e27333016e3f46f4431edcb57a. 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/HUA612303804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf901e536e8f57215793f7e7969440cd2532ea35b8042d62b88504cae0cbe08d9. 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/HUB872277077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a2544953d23456aa9aa18a0e37e41e92ef937cec3d444a85cb427456827bc. 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/HUA612302277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9a2544953d23456aa9aa18a0e37e41e92ef937cec3d444a85cb427456827bc. 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/HUA612302277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a16d8430f2ac84e5455844fe9a3a4c2a39c1565e325576e55ec10939ca4194a. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HUUM72100492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c17f758d5b99f86372d8859dac82dea7785d390a98a8fa9e4daf69a1f0185fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282550198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723dc8bbd8acafa746267094559423fbaeae424217967797f38d7b4185b3e1ed. 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/HUUM72200008.