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 0x6611e16b625a1e49530a6e8157afc291c441257a35e24e2f80115000f7a4c056. 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/08d20afd-c302-498b-a81a-08e88f676366.json and https://artists.proofprofile.net/proofs/artist/08d20afd-c302-498b-a81a-08e88f676366.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 0x431331e3e11719cf27ab70f630bd87467bcf127d99e8b7ebb3bf7039a230b029. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES75E2503072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e794ff4bc36aeb06e115b53dcfbc569fcab8668ef5b6184c2daf739ce37c4d8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES75E2503073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b8c06a15896636dd539d5a4bf90556c3bcc9350a6fd245efabaff9c96bde61. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ES75E2503074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d16878cb0368b59ecd26fc192102a770ade74852ca8de0c03237c56466dbc21. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:00:30Z), 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/ES75E2503075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621c15922b0c0bc968e1285983a15d5159b47b2b034e1994c6b9e4e8a31628cc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ES75E2503076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbe7a87426ed167ac7338ee5c414c444e8f75114141b67f9cf8998102b7ba3e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES75E2503077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac42b2b51a0fc4b08291c2efcbe0da97ea0b6828f21688b69146022d9ec4f4a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ES75E2503078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd341c32035423e577bb2c5e70b4c37ca1a2fd7e6a6f80d90a737511f217e215d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES75E2503079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99d3fd546e3f15f8afd9e77f2ebd5dc6df0457e712253b11be5331b58a3e387. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES75E2503080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf8f2e5e8e7b922193c4f666e1b648ca7d01f2723548c1559dbde8423422ddc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:59Z), 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/ES75E2505448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42e277f67fdef7faf2ed384f39d25d34b69bcfe6140d80edfebd8dc8e1b109e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:47:55Z), 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/ES75E2505449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a0b1b210256bb889b97b740220ebfc6cbb4517c355b43ca5df1da68b16ce29. 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/ES75E2505450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba36c37294bdcbd8b73e881303897141db66930d24eee346cccfe557e2f6408. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES75E2505451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc68c435ead5ab747a4514e2de74f11093181111a15142ea241e39456972a5a4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES75E2505452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0124fac70c0a62dc06f5937658b820e937da7416a073ff01bb0a49d6391cdd39. 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/ES75E2505453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4fa05f1e87aad5074c3c21952b57f4c73c251352b002b26f697f305a602345. 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/ES75E2505455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54d86e5a7ebdadb605a7ce3105174239c1afa9552cbc374937ab828856e0bf4. 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/ES75E2505456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449f24bec2b0971d132050ccc1220fc52b6b3d3a85956a6bd7977750c5bf38e7. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/ES75E2505457.