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 0xd52dd3a98c621cc1aab4d6b47df436a7abcc0ee2355311b6d31fd6705a73d33a. 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/e2511b9f-4993-42ae-8aac-de83668a8311.json and https://artists.proofprofile.net/proofs/artist/e2511b9f-4993-42ae-8aac-de83668a8311.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 0x156a6f1dd257c11a26e744a5b2248b8053bf220d6eaf50eb1c8e8459c544fb11. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GBLFP2258276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b31f5d352265608b509129db628a6165b6b4483afaa7b31f0bd3a0b80574f7. 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/GBLFP2263099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc5621ab7286741fb9ef4fc0ec98da6bd612851ece8865aa653188bfdfd2fbb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLFP2258277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10429ea1f193177f62713ecfe5a53d38a3b1bd978bd510ae391b957613dbcede. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GBLFP2258278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34549f684104278e29b355fe1482a4f6acee8af6f597041ffe381c7cda2f2e8f. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/GBLFP2260296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dd21c8cf338a5318a89696f11902cbe4bbd794c52e476a252f55927b33fee4. 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/GBLFP2260301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d616bef221d5421abda061e4c5640567add944013a5508f98e4c0ebce87d14d. 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/GBLFP2260300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d08ed63dd905939f32cb5cf242bce395103082eda17271df5d0ec12c89646c. 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/GBLFP2260302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984b77792b6099b408fce274e31d33cda1909a966791c6b5acd97ed3ac698cfc. 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/GBLFP2264978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb0ae6a5180d833e4b081bd2dd0d8faf6e3f018297d55ec9445e78e475a0c7e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBLFP2264980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2168e0633806d5aaad4455b9e48186db27a92472992840bd38095daec33603f6. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBLFP2260303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651a27f62213ddc41984ee0b0989cf3840fcb3744a36445cb9b99a96ed695a1. 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/GBLFP2261292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49989cac980011b8e32cd5b57396c4ced99674da1e918e059552643c21e70cb9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/GBLFP2264983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4ba994ee0c1e976bb65d8eaea3e7c8f2668766e12c66cd49448df185d23130. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBLFP2261296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a10360a8babd129e67e6232de8d7d53cb7657735cf69cefeaa45b39c01b3649. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBLFP2261293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e8d054a293814c32b88ed64dcbb882352289f9914cfe8496ffc7871aa44d8c. 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/GBLFP2261294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4774557914c46437a79da3519139fa779d6e392dc8360406396b6d975a81688. 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/GBLFP2261297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8141f627007223a916f3bb4ca47f4fb871ce0c0f87847536bc53bc2f0f4db098. 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/GBLFP2263100.