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 0x836171f4b0d9d154445ba43346ac06364fb885350df38846f429848b87f9c58c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5c65b5a-a511-4a94-81d6-b1fe12f94fe8.json and https://artists.proofprofile.net/proofs/artist/c5c65b5a-a511-4a94-81d6-b1fe12f94fe8.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 0x9dddb8e4a3429ef8c9333d5e30da4fe9d9657923f6c0168253f8dbe80bf769e1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:08Z), 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/TCABS1322065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c04faaaed5dde7552c7462d81d99a74232e623ad3bdaf3c3826eaf48426d37. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:24:32Z), 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/TCABS1322073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ab31802a4e1e0c68eb94d641e3f140cb4fc43de18f1056728a7b2ceeab6aa6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCABS1322075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8df9232ed2a1671f8570408978c568f3bcdf22d3c43ff8f478ce25ca465481. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCABT1455708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc854efc84fe5dc8f09331d69b4c1f8aaaf514a22ed8f60a4a8668d7cae27add3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/TCABT1455715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cc6961f14f42ddbb2bfa26501156aa6d1d02262762d3f41d34bcfb87f97c75. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:09:24Z), 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/TCABT1455718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85f5fc25bf56cb1d3a52fd02fb1ee62d4e9659a7d52979a8c1017d83d98b541. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:44:10Z), 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/TCABT1455723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373ad37d1782e446c75d2608e60ba7c53efae4bbc4ef28b8bc522385303997f2. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCABT1455725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe905a690a145c2d2aafc4febf1b89bcff7e0fbe1d4f8162bd678251ae68722db. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCABT1455731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae155e3a47b8dddbe9b435a5cf7ba2aa25c2479df7ec7289432cd4e7f948ac3. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:27:45Z), 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/TCABT1455733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b505531bf4fc0d0edb7b20a00394df03d79572170a1cf28a1148a6a5fdf4e9. 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/TCABT1455735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711243c42cfd7e07403d7fcbae51955dcd312abae35e8f8ec87049c3acfb708f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:30:26Z), 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/TCABQ1323692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fb89801013499723527744333353fabf949c23ebfdf1bac1785bf085b0e9fc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCABQ1323702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772ffdd3dac24891fe630b44401efedf2562556ff4f318a8ba33b704b22d8093. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCABQ1323704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f2ad1f4bfde126ab26094f693e62bfb24551693d64efb13cf0740a0317b093. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCABQ1323718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4401712ced3d20d8d425a7a6859d3ecd16e116b538843fe36e77652a8f93ecfe. 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/TCADX1872366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa257532bfc73a004bdec24d727a9dfd649d74611e2723b2079ded29e24c8a877. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCADX1872371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b4d2d536d1f0b5cbdd2d3f1078794f0e3a921c2eda095f7a116e3082d2c939. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCADX1872376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4616c9ab29bea388654cec63cadce7cdc7ffa8c10476ca4f9ccdf742e046f8fb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:39:43Z), 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/TCADX1872381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2329a615ac8749a7f233f829d1b044338be84d42259a98f8eff46d88c21aa3b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCADX1872384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10efd22e80177c99a21ff07dd936aedfbbc3942758ca9a4afc301be0fd820e4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/RUA071200454.