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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b61633deeae7acf8b3887add95a201d084cfb88e1d013a8da4e0a5fc6bd99c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c183325-2c48-49b9-a37f-6c7b5e2e4901.json and https://artists.proofprofile.net/proofs/artist/4c183325-2c48-49b9-a37f-6c7b5e2e4901.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdead7a9bd2377a9551d70bc723fb5453a83eb0d99bbc801eed9f0322968f7175. 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/BR4GA1700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b75c7964fb2fb33c946c4b8ba9edf5185a3425fe05081c57abe4d2ed3c28a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BR4GA1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb490f3442e3401d2c6e613dfd34423836295877fedb9682373ef8b7ec067a6b0. 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/BR4GA1700029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43eb67be351270f99414fba38206eaebc147699c3ddf542a0e6762e045ba603c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BR4GA1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1120ccd184b346042bb0937c817fce10364fec18147dd67ba92b925405eed5. 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/BR4GA1700031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4dae286e88703a02e22b308bf630bb6b6cb4d3185ad1a910487d9c6ddbc9f98. 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/BR4GA1700032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab705f0b11a002deed53f65df5780323e33b1bac8e8b93eff184a81b2023eef6. 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/BR4GA1700035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca40d7e432f16a753f8005243aa8f32f0d5c59324a3285895cf2358371a0b3b. 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/BR4GA1700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ffd2e837d532c178c88275c79eb3a001b93fba8d3c643a3abe16b16c3018f7. 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/BR4GA1700033.
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 0x4f068f2605e089b46c6b905fb559f6ad7af29d0ddaf04607347d0552a0a3ac8e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR4GA1700034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c630876da41c6192bbe6cc17d91e5954ffe4c2d08fafa8680b5e8b77d3d581. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR4GA1700037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7f2f306d4c1c27493ca1423de7e8dff97f89f7bdd25ae7be2e2329e0608fd4. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BR4GA1700038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a7fe68f8c72c0761b4e62b51e3d846e61f76e9f8f73226590daea02f3a0603. 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/BR4GA1700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d165d99c646033aa88bdbd5520fb61159d04b9a9a3ec1900d4163021496191. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BR4GA1700065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8072274bc943d85fed0e659cb4a7c2da49f31280ae8faf1c6706274eebc4514. 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/BR4GA1700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3e52cd50d6c30de536c16715b73308e3e207b9e6745a31bc1e13b3166ebc5e. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:42:26Z), 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/BR4GA1800137.