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 0xd58a2d162beda4cccf8dc9455179e4a8c192f169da1158c3226ecfe6ca35987c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f88c0cb-f3c4-4d41-be26-56bec4521312.json and https://artists.proofprofile.net/proofs/artist/1f88c0cb-f3c4-4d41-be26-56bec4521312.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 0xe72e5c10fa4694f90618ed3a6b8346cd7afc746552f3c549ddd601e7886e60ac. 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/TCADA1749399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca449155210e8b8a3c9da47f31908024499ca1123b8f3fdcf7fae49d47eee06. 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/TCADA1749401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfd6946d5493a54dab047dde407ae7f677aa3f04ea525d7ef9ce00edbe82b76. 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/TCADA1749403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa236b45c143d876e69fe1772514b98be7f7d3e479f24d92eac10e0def7879321. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TCADA1749404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317ddbb7d6a12944c84fed4f05c6d99442d1ba2b03da4421d36c88de98c528ef. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCADA1749406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a4df7f11c63f3b148c759391657d28af8142f936e74835c7587a4125464b56. 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/TCADA1749402.
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 0xeef5504c94e0495bef440f3c44c19dee20a345611880b00a010c64ccc17902c9. 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/TCADA1749407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9dbbef096d06659ae09316691098eedeb79b513f641eca2d3231ea2b034bbdc. 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/TCACS1637929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9edd41d5acf6d70c47d19da127b9f66a973ea637c75141a4b9c2ee2f0b2c69. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCACS1637930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88a6b84d8482c5e9c0c07a301375c22191168fe0856400fb9526a7f1232faf9. 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/TCACS1637932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f642596963fa542c9bdba6895b552e9070fc019bb60e401496027bc25d910a7. 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/TCACS1637933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0caec25df94ab0f6018315d5c7822fd5f53884b6f82ef9b73af4008ca7ace9b. 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/TCACS1637934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91eb0d0b5f1ae1baf1ff4b54209045179c1f2678a711d3d0e45ff9e072c75ed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCACS1637935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9ea06ae0cca64410b5108d8f288bb994101109fe6730de1586834c2680fbcb. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TCACS1637936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977c4315fedc95fa0dd2c9b68e34cccdb9e5ee0a3189a0b50a04899e9c6db57c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCACS1637939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1769ae532964a374904d5c25808779afb5ed5e744a23149c6bb17607b37e68. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADB1738224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbebc32fcd0800038118628c1591dfad8bb6d76ea58b4245a22d30f6646eb85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADB1738226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3f5131a126ebb18a21c5c8bb834bb9fd4d4b8787fd758642833c82b5a409f5. 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/TCADB1738227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ee0be48bef1df07b1fd60c642bdfca08708f2cf16541ea3620d7f594fa679c. 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/TCADB1738231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cf3cb09300f380d0facec393c4746ec9339377c6628733ab0c7e18626fe304. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADB1738241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f536fffac230e53a58a78874e091095179a01ef1b7802de40f28ab77ce7fc3. 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/TCADB1738242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07ce3f9d24056a7eef57cd644234199c3df9e63c631f458e6daa1e81cfc41c5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCADB1738244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8ac7fc75d96dbce9e1f4e108de688fc7a9f6e23f93912a77c7197a0431a37a. 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/TCAIE2493536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5404a0c5ba6472f48da8636ac47f4b9151e40e5f3e94e52b22cada7712c2b83a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHT2323505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64edd87a77bd5d53fabab3dde710a093a5e899aed47b97988c5331f9acfa8597. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAHG2373341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef18a9f75bb48d12d9e661e0027beb407df4f14d1b2c0328b1b6d2a15a01a328. 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/TCACC1465411.