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 0x535f52b809beb85ca38429ec4e7031977a7e35bc72649051b64f0e6c52253d44. 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/d40b89b7-876a-4786-b662-3aa34302f19c.json and https://artists.proofprofile.net/proofs/artist/d40b89b7-876a-4786-b662-3aa34302f19c.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 0xd812b9230b9a9284289d6438f054fea9513beeba36c658b60d6afb722c1083d9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKZT91900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548364a393d4edd08227f71b1dbfb8d68d81dd5eafe875012622c9ee5d06b6bb. 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/DKZT91900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2c1f91c2dd5f2d2456254b2cd9a5855080710a5f852bb3b6146444115327f3. 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/DKZT91900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407491aedee69c869ddc3c69002eba09917b33fd33b8590284bd52d0b4164c91. 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/DKZT91900104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6945d11a7bb506f2c884924a496230b38f59ee68bcc46b780a44fb10049843e. 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/DKZT91900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd509045ef7d7def58b46de54a7913f676d8061270ad81438520f8d9f62226. 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/DKZT91900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cb3c0ea66e0e95799ffc8964602643f99ecb3fe393ee8522428ea7ade28976. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DKZT91900107.
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 0x2990c2597195cdefdbd6eafc1ad90c71d7aa2d8e02937fcf5914b0d8bf4466d1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DKZT91900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddddadbb514f7ba7ba4a6048a7ba273197c313b985cdc7c9b1187e35d6e3e78a. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/DKZT91900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f9f24bb24b95f6f8559d0d064c73b30cff891a4a40b921b420b58974fd6286. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DKZT91900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8d3c04dd7ac9c28873d5c7b5e0225f5d5ec87e191f75d9f2dc77419ae5612. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:49:54Z), 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/DKZT92200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a14c3904eb515f9738396007e3933867d175b5d5982984114641c36deb1701. 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/DKZT92200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984dac4c7ed42598e78522ae7fbf4629025c7ee03e4c63752c671a3898d49361. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DKZT92200905.
Europe (feat. Claudia Campagnol, Marcus Miller, Manu Katché)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a3d799c6ebae34b031ed6ec677cfa405828123ce995d3092ff208469dee9c9. 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/ITQ001600286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4be16bb964b4b8bf45ced1d7df1edaf12cd2fd5db57bddfb8d4ef6b74b6a7c. 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/ITQ001600289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64b86a6c355758d1281b03ce7b89aae0c32c7e45300866441fd069983614ca3. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DKZT92100401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503c6eddd08ab98b12a6c2f6448179a07bdf81012899583e205a30a9f3167cbf. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DKH7B1800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aef889c5e572dcd612d33076643a5593d9bd32c19a4e44358d137c151ef3d0. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DKH7B1800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50384b00ac70d2132a3393dc108d1e2cf2bb97dac8e2f081cddcc42f402575ee. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DKH7B1800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead7a5cad766717d44a76a16934113c941aee5fbfc3befee628046cef842c9f4. 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/DKH7B1800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa91e6de07e6c25d1258a6254951e6794a54e492f331522caae2b8403be21b1. 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/DKH7B1800107.