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 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 0x4b59d4a51244b468de97344f5ac6150e12e8c0bd826217dc0df35c1b4dc41959. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07072795-2f12-4f0f-909e-7973dfa3be46.json and https://artists.proofprofile.net/proofs/artist/07072795-2f12-4f0f-909e-7973dfa3be46.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 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 0xd21d1a8a91858acf3a552985de9e64725df2f03f43dff03229d87299fc24425a. 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/US7VG1648709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21d1a8a91858acf3a552985de9e64725df2f03f43dff03229d87299fc24425a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/US7VG1648709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c5eabba09567ed77ed25308419f63b4f908cc756fe1aba3c5c06c4041ccab4. 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/QZ5AB1619474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fff1419e1f6d0f9e46fb63ec3fc00d10c6ed92a011f870eaa1be8c3bc30906. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ5AB1619475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9867e11263d39c147bafe1ff540ab3211bf5b7c8cca82a8c9cba37bd3b1e5b8e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZ5AB1619476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c78e95b833316ad0aa87a2329bfbba1acede9b8f4a010e5fdeecb117d50087. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZ5AB1619479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c5eabba09567ed77ed25308419f63b4f908cc756fe1aba3c5c06c4041ccab4. 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/QZ5AB1619474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fff1419e1f6d0f9e46fb63ec3fc00d10c6ed92a011f870eaa1be8c3bc30906. 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/QZ5AB1619475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9867e11263d39c147bafe1ff540ab3211bf5b7c8cca82a8c9cba37bd3b1e5b8e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5AB1619476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c78e95b833316ad0aa87a2329bfbba1acede9b8f4a010e5fdeecb117d50087. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZ5AB1619479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f0c2c11b6d485248c9e23c149f362dc6972947caffb7022976cb1a9b4ef392. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UKXN22470254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac23f93802d12aa69512b73502d4bc01c8e4c0d316699c3cc097436efca45b4a. 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/UKXN22470250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cc187eeb9262cbb77a2c34925d0672a668a05151a2ac3242834f7d1e432b99. 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/UKXN22470252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5d23ef7a94ef901c0ca07dd99770e50d37c76b9ab3329b9bca0f9c163a8292. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/UKXN22470255.
Colombian Soul Compiled by Bagar AKA Tricky D
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5fe04bf32a28d67faad1ebb345a412279e9ad45407e2724916ed6d5f5092b7. 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/GBEQT1900039.