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 0xeda3cf392d5b1a0dcc2eeb32683cfebadc0612630a973cfa0faaad8238cde1a0. 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/7089fb86-a93a-44f6-b187-5316b6767834.json and https://artists.proofprofile.net/proofs/artist/7089fb86-a93a-44f6-b187-5316b6767834.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 0x7668a0016196f23e77fde24d21eb56ee8d73f6324396b8db20de2a66ca8132e8. 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/USHM91309021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fc1d59b4aab9f6a22e019dfb18f9948258193502531cf8e94de579704b9d00. 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/USHM91309022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ea97fd9f2789a6f736b8ceaa3140fd2326546f95f87f9c8a8b011aed162159. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USHM91309026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f11e3e84937a29e6dee54ed0b77d79920aeac1ce9407ff7e783dac0bbcc9b1. 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/USDY42254664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9f11e3e84937a29e6dee54ed0b77d79920aeac1ce9407ff7e783dac0bbcc9b1. 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/USDY42254664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aed48a990d9bd9c5baf805c4c5ec8083b4503deda78e1cb466bf23809c145ca. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USHM22280727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3af0ff2cc3eab8c8c9c0f5066ffd84ea9bb7b44ec40c460dcb294db7a6e844. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USHM22280728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd697cc637181d3ea8b1d7bfcb68c6ced6f3b1ea08dd963035c4e718a07fc895e. 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/USHM22280731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fbec2573fe408e3686275beaa7e1e715e059b9055acecd39ca09395aa190fa. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USL4R2378933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b90cbc98422545023ad4cfaaedc23a3574e5a64ac9ef6e7d86db2e95dd28a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2406066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41e3e13e91f3f7c354df5e09dd9efb81ecec1dcb77c20aad0fa0bdd63c87f84. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USCGH2467982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fbec2573fe408e3686275beaa7e1e715e059b9055acecd39ca09395aa190fa. 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/USL4R2378933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2b90cbc98422545023ad4cfaaedc23a3574e5a64ac9ef6e7d86db2e95dd28a. 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/USCGH2406066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8361e28c159ec8985ede411b470b6430df82c6db0e3c1926da7f21406ab26e72. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM92466850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686d5e1142f1a0b5c36ca5eb9af18971eb41d0878a97a9792c73d5e76bd0d91. 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/USL4Q2465780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd686d5e1142f1a0b5c36ca5eb9af18971eb41d0878a97a9792c73d5e76bd0d91. 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/USL4Q2465780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8361e28c159ec8985ede411b470b6430df82c6db0e3c1926da7f21406ab26e72. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM92466850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a5f59a7adbc5ad3e9694250bc15cc245940eceacf8f0afcf11fd9d78932f34. 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/USCGJ2393584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70eb8633a0c97aded039cb00ad8103c8c4d580cbc7c402d9b43f29124cd8f240. 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/USHM22449929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3388ce7f8456cd876cf8169e786d69a3be4a3a142395d1d44cedac75ab740267. 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/USX9P2406755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf997ac1af3611e9092c3c0c3cee2b0fdb62173d855cbac8fdc24fb3398b974. 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/USX9P2406756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8111b59bc5441695dc7d6f2168a8887f81f96ed373f30f336eaf89f7379bd76d. 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/USX9P2406757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324840cb4279c42bb51491779945f884d0fb26b75eebc9828ff2122a8871952. 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/USX9P2406758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d41750b3fc5656acdfe0caa6ad5ef4c0896a9508b8c298b9d685422101cfdb8. 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/USX9P2406759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbfbf7c388d7514709e5a2588fe987209a73c34408a9b3c3b3be686d3be0b4a. 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/USX9P2406760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdecb34096c22a7bd1b2eb5aaa67fdce1c5e45e40cc166b1e56d5163dd5d75ba. 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/USX9P2406761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9d6debea909298b82414039fb9dacb349b8944527295bd88e8743e740e7c5b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USL4R2380548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccb8ac0e9f9867e8af5d96aad35e5302f2d2d67e9a47d9bab45e11f45dbe6b8. 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/USCGJ1596526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8107ddee8ab7dd648a2d17b1d4bb700d6845ecff76f2da76912f506f95faa887. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGJ2264225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3af0ff2cc3eab8c8c9c0f5066ffd84ea9bb7b44ec40c460dcb294db7a6e844. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM22280728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62768b08e9ef34495c99cfe207c6f8e0b38f6f88d1fd0ee07a035ce4d1850c77. 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/USL4R2526224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7aaf79aa64586397e997b48b33dc6e3caf0bf7982779033f3dfba48e83c0fc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z1665392.