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 0x91052520b410a006bdc16d218ecc1fda5b0ac1f538ea8eb0b99f8a20ed1438d5. 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/a1abbb92-1129-44ec-a802-34068bc8581e.json and https://artists.proofprofile.net/proofs/artist/a1abbb92-1129-44ec-a802-34068bc8581e.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 0x61bb34b5e7900c9e14fa5101cd80fa1aea9413dc67451d4ed6b42013522ffd5c. 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/SEYOK1849995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05688785884ced8cd12a71301ad90d941db2ef9790357c33e006edddc2b04c0f. 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/SEYOK1915275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb7a6b9f47e3c80e6a5dfae9c654aca2f2f999d86189574b8c448872d76d10e. 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/SEYOK1954427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399b0a7ae986f9a1a403615a15e2fc1374317512888dfe3463cb137b029440ca. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/SEYOK2005955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1b4188884eed4bc2cf353a38bcf56f34c483e5efe536cd2d8950f12961a3ff. 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/SEYOK2014318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa4bf1e12611fd3db842f831f791908284732e4782d6f6daf5811fea080f460. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK2053524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf77085e4928101b1e02d198668eebf11cf380fe102e23d53db99585503e793. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK2027859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a16c7b734678eef3bf40b69af3051bb1204cd260ca511b22b6e58f83c289156. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK2053525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b2625dba5112ef1bd356e254278c0aace35fd9ac86640e040dca7dcdceba30. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK2053526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98eb410dce318c04a6155f36ed8cdcfa3bcd7705e5f9ecb3ad3b587bc2845789. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK2053527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef42d0ce596ec597460c1f45ad069cee6ac83320ac5cf774ee48bd5e898b717b. 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/SEYOK2053528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd1edb5dd47514817456dea335054298cb104e06c3dde1e70ede8fb7de1d011. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SEYOK2053529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448dd8abb6a3f13ac0d400577ff987dfe9041f96235d5a75274fe2f270144e18. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEYOK2039321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3019b4590d435398935aef95b98ee6f4acfd0eb6859d220bfb7462ef82722cca. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEYOK2053530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2005a96a9477201d0b736ee4d1ad3c669718676bdd05502cfe2b17beefd4758b. 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/DEE862300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c74c71a2595035a2801bd2fde786d8d4704e308b9cc11ac2c068215d72ba780. 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/DEE862300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d652991b8cc5806cc1ad4e4881a1958d89c52d92488be1644fa06b182c8a387. 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/DEE862300543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b214d8d080a77cbdcced5ea503db7ff78610b288e93dfd6360898ddeb1b7ae5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEE862300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31097180aca2b5e81167b82f33c8b099ef3b5b84e5360042a6b69b98ea5eb862. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEE862300546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de60793d1784bdf430623db5056d1a3c32d521192f3cfd4bd757515018c63f7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH7812372898.