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 0x0a966cc0a85a0e1a9d45edf2ab8e967a5f2a0afd81ca26109e34f071c44a35d7. 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/2e5016a4-865b-414a-a094-7d6e75ae4e3d.json and https://artists.proofprofile.net/proofs/artist/2e5016a4-865b-414a-a094-7d6e75ae4e3d.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 0xea11e021ab737d1cc8048346b8b3f348946853799c85aec1a7c5e760fbdec3b3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BR3440500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6becfafb1d1434623eb2c321c5f9fb0e2934d2e8b4aea7e342b63c8fcc32d3ac. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BR3440500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7ef9d80b5975cdb15317cdbd470fa846b06276517864a66af8ccd0ab3ed07c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BR3440500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f8aee8a415d1a625c1f1e5017e4959eef202de07c66c8a693d86ad8833f8b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BR3440500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53645d243fd3e0ed00cb191ba2860991a7cc28973f9a69ec99557041052ec7ec. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:00Z), 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/BR3440500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93b45b0eb2817c9677f306722d975f4868e677731237b4541083164a45d596. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/BR1R80900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24567c65fcd976250554170f2fcc6f0d6fd8133edf88c2f982053f24b99e372. 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/BROJ51400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761a76989a69b1791ff258743b9ecf67a59181d35ccdbf9b40a9999bec153cdc. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/BROJ51400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696870d576fa73603c8f8683fbc945add0b36326451fc5095ef18322a86108d5. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BROJ51400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98734fb5650870107354773399cdcef24f37f269e175dfcb847c0ff1f35a375. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T08:00:42Z), 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/BROJ51400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f36914bcd0c363b27a53ff1514a8500de1a9b3d7a383e31888655ea6ce7a54. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/BRYAT1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f9e1420e2eb53801540750a317220f1081a7b40e8006678b8a2522645d414. 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/QZ5AB2139047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b28756660da2fd10f24d174a53868a39393503efcc055e260c68f992f491afb. 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/BRDSL1300002.