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 0xd0ad7283b5521a3c963ad95cd11e90c5f718d80af67cf2e9cff3905be5e31dd1. 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/b25059c9-e23a-4ee1-a93c-8d2f45eca5fb.json and https://artists.proofprofile.net/proofs/artist/b25059c9-e23a-4ee1-a93c-8d2f45eca5fb.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 0xcc4a8b60e36503d460b2dccaabec7223fbe19e5ab1dc59594c6af11bdfc4d663. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:37:08Z), 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/US3DF2231456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d8342ed79f08bc2b1694a823f373a24848969301923ac4a746238f88e7b2ed. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:31:29Z), 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/US3DF2262079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e279ab33925b0148f5266cca78066775bcc7582e80f55f1489a89a48ba802a6. 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/QM3DF2291443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4485a6eebf0a8d01ee9268a9696ba0cd198cb3fafd1dd3ad5b6a20a36fef3e3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:45:52Z), 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/QZHN72385313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5717f21bbe814a0ca0d5e106c0e0366fd39e130c41c0e3a60da6022d58a4d6a. 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/QZHN72385314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e5c293d7328d01a4a441f725e1a070c97f5209a054b8c165beda7cb54f0cf5. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZK6L2343393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7ac919f08e4ad5f562fa7f7f355f4c59ac2e3418d99b47b420ed919340dbca. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMANG2253505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006e6e424d5225c62b071e4bc5c617f8c4c7f57d8f2d6d2c975512e599aa908. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:05:47Z), 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/DEH742436687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053f9580b2b04879c96bb154640eb78670b00f7bea951a525071da9a222fba91. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEH742439846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9321c608afb3e7d1f5df495b093a7c042f2db49031da2f9bda87f706d7d52d0. 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/DEH742439847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe006e6e424d5225c62b071e4bc5c617f8c4c7f57d8f2d6d2c975512e599aa908. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEH742436687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18b7d6a834fd5c4dd3a52fcc88a424b090347b5242ab783d24fb5b4f8b0d898. 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/US3DF2447701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b864c47dc2e4b546ba09475f68555d2ec0564ee290e6f2329520f0f368d5d8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/UKZGC2401394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdac52f29830e471c8cba815ebcc67b487bbb21fd33b532898dd83ed531dfcc7. 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/QM3DF2289069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee924c7094725bab0bcbd350e8f9fb347cd21f90b9f773091f89f0f802a2b81. 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/QZHN62418960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68a5225920e5f47934e93105b4008bffb75cf4517bae3ccf6551e158cd83c29. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN62416532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3936bb7ee674311753ab1189337132ec9e3a7ba0c0932b0dd3cb4166ae2eab38. 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/GXESV2402487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123d4b3eccbf3ecfcce595e32b0638a1a2666d19c8c4d9068b5cbaf8e029c12b. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/US3DF2445348.
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 0x1e1e24c3c608015a85bc85d56123767e4791b38e88c02b27486c42980364feeb. 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/QM3DF2289072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e048cbe8b49a1da13d7a8b94e8446389e54eb310f713c8bba4583998f090a1. 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/US3DF2416462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32e29a95f6eacf5a90247f229cca9772705b939596e376e87783671c465ecf8. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/UKZGC2309382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda51c356d0aaa147c017a5b0f3c58b893297c2980fff39b39addee2924ffb0a5. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/UKZGC2309383.