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 0x68ef5a11c909ec5fa96810c93c661a78a8f703d8e5125a6afc464bf0ba16dfd1. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/290bc03a-4b0d-4fcb-bae4-e36ef766f26d.json and https://artists.proofprofile.net/proofs/artist/290bc03a-4b0d-4fcb-bae4-e36ef766f26d.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 0x7ffc9f7199bbcc33d629f427d85eaa82b375d82d858803149b6b011e0270b641. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA5KR1945599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf124a8ba55341ef29ded8d7bf8202324889fe529dde27c7dc71fc1042bf51ccc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEUD41908717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f2ea57c05c7a90f3d0c85af5a7ce9769a4775e8a4af689ca63582d6e581dac. 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/GBENT1510056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a42ea5416c81426078ae57693d39988bf900370d1adf5c2bd25917c4bf5d2. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CA5KR1827748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe43b54416fc328fa57067a2cc60e889c05a48d64dc5107aeb0a49b0faa7b852. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/CA5KR2053847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5403f9b5c459961324d75d6af44be5c04ddec6bd3b433e175d7df9de17cdf243. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CA5KR2053849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1658a500ffb92daca9fe55abec78e3a0f0029818d5df2a27cab8f8f048a6a7e1. 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/CA5KR2053852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb868b38b28a6dac6cff168a93605b919c150cffc01a429e5256553429019f7a8. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CA5KR2143092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe052552caf49988dc98860f50f2ab2bb8894482aaa98cecbf2f7248cd6caf0a9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CA5KR2143101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2a712a91f18d0331769206468e52dc660bcaea0c6d6a54bd0bc604edd669f3. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CA5KR2143096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad17c9695b5c2a088db91e30f57807a4d1e899fd4992623d4deffbc4b631144. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR2143099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d36bae9ce69075f96aa095af70e1575128d67e91812d3e678805f6d1171d52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEH742228971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad32b0c7bb850f12c38e68b99554be287e11499283f65d7bc8f75aa2ab9a840b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEH742228973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb584340a8810254936af99c6648c3ae987555d175fb856e864d3e3b211c4c0b7. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEH742228974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0e68b744330f92b2163dd50d2b19f1c2d8cf6da8c814ecbb93c4283ac7b6ca. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/CA5KR1966331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19cb1f2e933fe459a1ebd51885c13319b337984be505480d7587d933331f346. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1966334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d24cb7c74786b6dd1872c5469eefb224d18b8330751828a030afe8f4c575a63. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CH9251100157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64359a7540db9b561cf893bbf9945cec08dd5c189af385afe103178aaa1ece87. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CA5KR1907634.
VA Innocent Music December Sampler vol.6
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f0c891da40db18a8e75f6c14a92432a092d10f119b3c5867a8cf0a94231a07. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1705220.