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 0x55d5b62c69dd16b7fda430f8d276e18957d60616017c6e962d2fac707cb2b01e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/488b6ba0-b7cd-4834-b025-af0f3c6679a6.json and https://artists.proofprofile.net/proofs/artist/488b6ba0-b7cd-4834-b025-af0f3c6679a6.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 0x40e341d8a584deb1be48cae80aaf33a54cdfc18f5a887f782bdbad1cbce070cc. 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/NLSB72400337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614751be8194cfe744a850f55d2eea1e5202ce52c58dfd323de53b6cf7e7e5db. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USANG2409633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f438645dfa42b0566b3330fe3aa11b3254617e1d134025a1a37dcd649c56a8d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USANG2252907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f67a58dd362096995bb116ce0f5710733b12ea6c07d480909dce998c47768e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USANG2252909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a22bd980a1fb9e1a9d87e79d502b521263821954aaf2a433741eca7a227049. 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/USANG2216300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484e9cccaa5b27d6bb3d98ef0abf262e98f79063a54bfe5e952bc2227c99fdbc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USANG2216311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497646b9b8467966f4409ed2e9e67629b82dddfd9f521615af4fdbc65c2cddd0. 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/USANG2216092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755ff1b774ca7e8f52f0906bd47aeb89a41ba009509a0315ea3b1f44117d54a5. 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/QM3BC2220066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7f0fbdffca76f8e51608550a190b5aa56af4b966075edb74c6dda40dbe8db8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM3BC2220069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0846a2b549faedac04e66f52e9946de27e6856f5c1309c2df8c2f827fd1efd4c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM3BC2220072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0acd50007c4e165d875a1d7ea3c5ed1a07fd6866e958853429513cbb3da4d05. 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/USANG2430010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91376a22c62906c4db11dcff0e1f9f99567f6d9f5307ea09eb8a623d0ec3487e. 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/USANG2430011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689e35c1d51a6f8f82d628a4b2df7dc1cad8e6f83af60965651ce1650f10c95d. 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/USANG2430012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11bc59203eb03219f2d53bb3a274f4c87478c336878330c85c4f6867aa83054. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US3DF2478265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666f44df83ca05f59134249c34304f12c1642c4ce811a54bd1c249512ab0ebb4. 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/US3DF2440279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3736e8a0459084d7f32a8a41df188210d4ad00c2f137c58de5e48935cdc53c7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QM3DF2288268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfe1a2d056366fb021a5a94a7f5dcb93dbb26161cd901b6c43c89966b471b08. 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/QM3DF2262860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8260248a31b6b2a4b1354d6d88de8e69cdff25ec8b816163c91d43a32a3c856a. 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/QM3DF2262861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf5a43c24cc65a4b154e0cff68849952b2e2099bf66457b94786626482205f0. 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/QM3DF2262862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aa3ed96f0c7085650719e3876b6dc30886f75f5414d720548c7a07fe007dfe. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM3DF2208703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d73a994f153efca9b20d024ad1ad41ff014eeec60e303dda604b26dbecf6b2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USANG2272676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f576c2786c4d93423c0b749d7d66125828c3e3218c2cd4e4fb59a54425da63. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USANG2242179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c03362ceda66f3e67a82d5cda31b61e54ad646946d53f32dccba5edafd41358. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USANG2246772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c057004f79c9fa18f9d0c743097cc455dc51830ae07b4072cf6982987509af8. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USANG2216296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497646b9b8467966f4409ed2e9e67629b82dddfd9f521615af4fdbc65c2cddd0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USANG2216092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390211c1c61bd02b60b74de6ec015a5ed75b05c4e6589b72819872bfe69ee9a3. 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/USANG2204377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24acedb6f86359cde1955d4e177e5fabe2b3a95f67c9766ff21b34fcb3881fdb. 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/USANG2204379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfe26eb23eaba11a3f9c4aa402a8c29e1ef0cc335edaf484f2c215d91b547cc. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USANG2204381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4de419d97800ed0a608fb89674b8ca39645a343a80f710b23e0df69bc9c7e22. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USANG2204382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6a7e05c6338edbfaaa0be4cb4152318711bae2963f6ebd94b8b01119a51028. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USANG2204380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7754f85e884754d8cdd276613d74d10163f4d2453ee97146682da77bff8cdf1e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USANG2210135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4374c38f181917aee6ebe497897763d8b600e862862f3d03930ff92709aca99e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/SE5BU2267554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7754f85e884754d8cdd276613d74d10163f4d2453ee97146682da77bff8cdf1e. 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/USANG2210135.