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 0xf1e96bdeb243c6afb6c8b3a68ebb53ce6be37a0e5ec11e541646325be7c80997. 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/09f07928-a5f5-4506-850b-551cfd2a1b6f.json and https://artists.proofprofile.net/proofs/artist/09f07928-a5f5-4506-850b-551cfd2a1b6f.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 0x437d0853b6a3205f2174616046acf1b79bfe5bd0eaa9a8d748ac4e9dd6da628d. 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/QZFYW1936336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adf5aacf745340c4179fa6fa311e05d5fc2abf46108e3f86e8ea5fbb2359974. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/DEXN92182340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526c33c04da7c04f0b59b942d73d403b636fb6eca3a3bb28bed556076061a505. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DE1A12196994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeeaac27e43ec92fd64b83867784609590cc309e25cd5b0e4e45cd30a39c1e9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX8KD2466451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54645cbe8d798f5f4f244f2cf608cd327cee00be7a8af864cb0ab1796db5e5c2. 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/GX8KD2417728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca899725def6396cae40fa3822b5edf3dc9fd57a0389aff9ea3a9cb33bf03db7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GX8LD2402522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3da007a66b32463214377d463be3c94bb0bfa8e17a96ccd443e8a06996742e. 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/QZWDE2313275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dab91cfe596671300754b311c5db09d12d2381de01ee1039d5894814b4dcff. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GX8LD2443006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dcde637fc808ad2bf16484ad652c75cea24893cad9cd4c8fbbdda3a809e5f0. 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/GX8LD2471885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c13302cd969a825581c188307c7d8c77ea329505eb0aa6063f8205dd54b0e1c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GX8LD2454902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ec9d9a64648f81cd0a120c258c301eef5d3ee3625bd8c30ba9530e222d12a0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GX38U2405744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a5035f5e91bcbf61540cf2efdf8895c29e5a8694fc9a764c5447f08ba2d705. 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/GX5MY2491855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d77c6ea7df16c76374fe8410700691ff58d3e73d0bc4af046dfa257ae42a6b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX38U2501715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da662e5cfd3b4e73c28efdae72e7d73da7c6f2d92a3d689fc983c9ca3f40472. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GX5MY2510058.