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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6060139a4ffe3dac8d63d3e67edfd46e1410a85df7f36ca22b9e35edd7a720. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0e05886-ae5f-4693-bd61-0f97fd406507.json and https://artists.proofprofile.net/proofs/artist/e0e05886-ae5f-4693-bd61-0f97fd406507.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c21e32614556314290f45306dc0f213c0c369ca92f91cb5edc956daf362f801. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA82033530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dd14f779e31f987e9eff6fc2b353dfaa9d16eedcd180eaa4f3027b7091e1a7. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:45Z), 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/QZK6N2096220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda4cdd8d3007f4450ead083b89588a1464b84ba7f38834e6928fe40d5807f9. 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/QZNWR2168634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d30c832e8304dc51d479228531292404a778dea1637f1bdc8da726cd651678. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:21:28Z), 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/QZNWU2170499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7320d26639f7aecb415e00479e6df49f0ebcba43edca5bc34b076e0a76dbab87. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZHN92240260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bb70e6f832bbe9d688479862c8fa9bd690888f59716f1aab86a3cc0d4ced0e. 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/QZK6K2278774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73aa0e9d4275d9e78b39328518980e58380870ecc7c98eb2219d1f32ab7ae17. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6N2221113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f02ca87848352ca9ccfdf9d55ff5a1e9634dad8429df22950111f21ac7efe5d. 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/QZK6K2278777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714fe4eb392a3b81c9565e146e7e52b19dc61313ef2ab65a9843de1b302c53f0. 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/QZNWU2206814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca45611f8680137b4a2a928e698e8fd2cac8b52c1aa9a30ae81a53e613156f3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNWY2202495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7dfa919bbc27c34bddc695577f8a7160478366138c834cdec17e3ebaca0a3d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB92229437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75049ac94ae0b5af3434a5fc969e367a424c92b2627f107d0461cfdff3cdcf1d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB92229438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d315d13713f8bcd97a687318dcc20727ecf56036d20776c88eb190e7781552. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ42334133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef145d490f08fde48cf327a7c44202aa05f95b23dbe258dd9a84c86037c81981. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZHN92388541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c104f99989006cf6b3ab1002d56369062ffd376dd99a834d8d2a3be489e1265. 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/QZK6H2315824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6179968267f18bb1216b1d23a9d74f597ded24e35c021dc577402abedf33b459. 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/QZNWS2388875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af968ce016f8197b7a3b34cd5ae857ffe15c86d23a43c13b4ec18d0180e97a8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:39:06Z), 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/QZMHP2436607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a51ad49cd1c9abc07bade1bcb9f7f8eefc7b39ff4140e0b283ec9ac7f04cac. 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/QZS652403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54490b376a43ca1bc75ce08be8d6f4ca1f479e485a66edd9094858347d5872db. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZS632463589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3a4c52a24f38f5e9a3db8992691ea4e4c0d1ef81a7f86c924dd2454774ae92. 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/QZS672449277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dba3d9ef854dd43d192380282ba900771c0700e7ab089bfdbda086567a32bf. 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/QZS672465548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a51ad49cd1c9abc07bade1bcb9f7f8eefc7b39ff4140e0b283ec9ac7f04cac. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZS652403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2690ba9e81bcd68be9bc1e679ab87e70f385e67ef0390e68fdf3a7829b70b8cb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:37:32Z), 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/QZS662440618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54490b376a43ca1bc75ce08be8d6f4ca1f479e485a66edd9094858347d5872db. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZS632463589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1507697fb391dcb39b9d0b6bc459b484e781cebb71b7ec8f07284aa7a41ec9. 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/QZMHN2469491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f62bb01ebec250aea972c8db8bfe2dae45046c6d20dffc18652525b6f052d7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:08:42Z), 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/QZTBC2487879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b6aeb920747852162d1bfc2d084e3a91376f3b3b725b188c0db2c88f3182e6. 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/QZTBF2479255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9f4226e91c9237d002de49a16e97a82a30384b37accaceecaeef93c2384513. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZTBF2479258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c0505fd498af54f557cc44c48e19b951015161ea15c31383af7fc548dbfd61. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZK6L2550983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d061b331f99c8fbc98a229f04fa34ca3400eca505203bf92b245ac1f34218a0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6H2528436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138dec70b4d51073260751ecdc6f0de08f06f16e7a7b9e975521f95a416f5b2b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:50:15Z), 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/QZZ782576050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1ec6b17597d857385bbc0ede2e20b274209bb42f1d602010de6708dfeb6910. 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/QZTB52360611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dde99d520e46aec07a6c62df424fe5b5a36efb085b4d843bd1342ce1e09846. 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/QZTB52360612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dccd7112c9ccd3cc7da2950857453f4559e7f72ca61c72f72a8e55513b533db. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZK6P2570476.
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